Merge pull request #1504 from bwitt/error_outofspace

Return error on out of space

.github/workflows/ci.yml

@@ -17,8 +17,32 @@ env:
   DEBIAN_FRONTEND: noninteractive
 
 jobs:
+  unit-test:
+    name: "Unit Tests"
+    runs-on: ubuntu-22.04
+    continue-on-error: false
+    timeout-minutes: 30
+    steps:
+      - name: "Checkout Repository"
+        uses: actions/checkout@v4
+        with:
+          # fetch the whole repo for `git describe` to work
+          fetch-depth: 0
+      - name: "Docker Image"
+        run: |
+          make docker-image
+      - name: "Unit Tests"
+        run: |
+          make docker-unit-tests
+          mkdir -p out/coverage
+          mv unit.out out/coverage/
+      - uses: actions/upload-artifact@v4
+        with:
+          name: unit-tests-coverage
+          path: out/
+
   test:
-    name: "Test (Ubuntu 22.04)"
+    name: "System Test"
     runs-on: ubuntu-22.04
     continue-on-error: false
     timeout-minutes: 30
@@ -63,21 +87,10 @@ jobs:
         with:
           directory: ${{ runner.temp }}
 
-      - name: "Run Unit Tests"
-        env:
-          RUN_LONG_TESTS: 'yes'
-          AZURE_STORAGE_ENDPOINT: "http://127.0.0.1:10000/devstoreaccount1"
-          AZURE_STORAGE_ACCOUNT: "devstoreaccount1"
-          AZURE_STORAGE_ACCESS_KEY: "Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw=="
-          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
-          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-        run: |
-          sudo mkdir -p /srv ; sudo chown runner /srv
-          COVERAGE_DIR=${{ runner.temp }} make test
-
       - name: "Run Benchmark"
         run: |
-          COVERAGE_DIR=${{ runner.temp }} make bench
+          mkdir -p out/coverage
+          COVERAGE_DIR=$PWD/out/coverage make bench
 
       - name: "Run System Tests"
         env:
@@ -89,22 +102,53 @@ jobs:
           AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
         run: |
           sudo mkdir -p /srv ; sudo chown runner /srv
-          COVERAGE_DIR=${{ runner.temp }} make system-test
+          mkdir -p out/coverage
+          COVERAGE_DIR=$PWD/out/coverage make system-test
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: system-tests-coverage
+          path: out/
+
+  coverage:
+    name: "Upload Coverage"
+    runs-on: ubuntu-22.04
+    continue-on-error: false
+    timeout-minutes: 30
+    needs:
+      - unit-test
+      - test
+    steps:
+      - name: "Checkout Repository"
+        uses: actions/checkout@v4
+
+      - name: "Download Unit Test Coverage"
+        uses: actions/download-artifact@v4
+        with:
+          name: unit-tests-coverage
+
+      - name: "Download System Test Coverage"
+        uses: actions/download-artifact@v4
+        with:
+          name: system-tests-coverage
 
       - name: "Merge Code Coverage"
         run: |
           go install github.com/wadey/gocovmerge@v0.0.0-20160331181800-b5bfa59ec0ad
-          ~/go/bin/gocovmerge unit.out ${{ runner.temp }}/*.out > coverage.txt
+          ~/go/bin/gocovmerge coverage/*.out > coverage.txt
 
       - name: "Upload Code Coverage"
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: coverage.txt
+          fail_ci_if_error: true
+
 
   ci-debian-build:
     name: "Build"
-    needs: test
+    needs:
+      - coverage
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
@@ -224,7 +268,8 @@ jobs:
 
   ci-binary-build:
     name: "Build"
-    needs: test
+    needs:
+      - coverage
     runs-on: ubuntu-latest
     strategy:
       matrix:

AUTHORS

@@ -78,3 +78,4 @@ List of contributors, in chronological order:
 * Juan Calderon-Perez (https://github.com/gaby)
 * Ato Araki (https://github.com/atotto)
 * Roman Lebedev (https://github.com/LebedevRI)
+* Brian Witt (https://github.com/bwitt)

Makefile

@@ -8,7 +8,7 @@ GOOS=$(shell go env GOHOSTOS)
 GOARCH=$(shell go env GOHOSTARCH)
 
 export PODMAN_USERNS = keep-id
-DOCKER_RUN = docker run --security-opt label=disable -it --user 0:0 --rm -v ${PWD}:/work/src
+DOCKER_RUN = docker run --security-opt label=disable --user 0:0 --rm -v ${PWD}:/work/src
 
 # Setting TZ for certificates
 export TZ=UTC
@@ -185,16 +185,16 @@ docker-image-no-cache:  ## Build aptly-dev docker image (no cache)
 	@docker build --no-cache -f system/Dockerfile . -t aptly-dev
 
 docker-build:  ## Build aptly in docker container
-	@$(DOCKER_RUN) aptly-dev /work/src/system/docker-wrapper build
+	@$(DOCKER_RUN) -t aptly-dev /work/src/system/docker-wrapper build
 
 docker-shell:  ## Run aptly and other commands in docker container
-	@$(DOCKER_RUN) -p 3142:3142 aptly-dev /work/src/system/docker-wrapper || true
+	@$(DOCKER_RUN) -it -p 3142:3142 aptly-dev /work/src/system/docker-wrapper || true
 
 docker-deb:  ## Build debian packages in docker container
-	@$(DOCKER_RUN) aptly-dev /work/src/system/docker-wrapper dpkg DEBARCH=amd64
+	@$(DOCKER_RUN) -t aptly-dev /work/src/system/docker-wrapper dpkg DEBARCH=amd64
 
-docker-unit-test:  ## Run unit tests in docker container (add TEST=regex to specify which tests to run)
+docker-unit-tests:  ## Run unit tests in docker container (add TEST=regex to specify which tests to run)
-	@$(DOCKER_RUN) aptly-dev /work/src/system/docker-wrapper \
+	$(DOCKER_RUN) -t --tmpfs /smallfs:rw,size=1m aptly-dev /work/src/system/docker-wrapper \
 		azurite-start \
 		AZURE_STORAGE_ENDPOINT=http://127.0.0.1:10000/devstoreaccount1 \
 		AZURE_STORAGE_ACCOUNT=devstoreaccount1 \
@@ -203,7 +203,7 @@ docker-unit-test:  ## Run unit tests in docker container (add TEST=regex to spec
 		azurite-stop
 
 docker-system-test:  ## Run system tests in docker container (add TEST=t04_mirror or TEST=UpdateMirror26Test to run only specific tests)
-	@$(DOCKER_RUN) aptly-dev /work/src/system/docker-wrapper \
+	@$(DOCKER_RUN) -t aptly-dev /work/src/system/docker-wrapper \
 		azurite-start \
 		AZURE_STORAGE_ENDPOINT=http://127.0.0.1:10000/devstoreaccount1 \
 		AZURE_STORAGE_ACCOUNT=devstoreaccount1 \
@@ -214,16 +214,16 @@ docker-system-test:  ## Run system tests in docker container (add TEST=t04_mirro
 		azurite-stop
 
 docker-serve:  ## Run development server (auto recompiling) on http://localhost:3142
-	@$(DOCKER_RUN) -p 3142:3142 -v /tmp/cache-go-aptly:/var/lib/aptly/.cache/go-build aptly-dev /work/src/system/docker-wrapper serve || true
+	@$(DOCKER_RUN) -it -p 3142:3142 -v /tmp/cache-go-aptly:/var/lib/aptly/.cache/go-build aptly-dev /work/src/system/docker-wrapper serve || true
 
 docker-lint:  ## Run golangci-lint in docker container
-	@$(DOCKER_RUN) aptly-dev /work/src/system/docker-wrapper lint
+	@$(DOCKER_RUN) -t aptly-dev /work/src/system/docker-wrapper lint
 
 docker-binaries:  ## Build binary releases (FreeBSD, macOS, Linux generic) in docker container
-	@$(DOCKER_RUN) aptly-dev /work/src/system/docker-wrapper binaries
+	@$(DOCKER_RUN) -t aptly-dev /work/src/system/docker-wrapper binaries
 
 docker-man:  ## Create man page in docker container
-	@$(DOCKER_RUN) aptly-dev /work/src/system/docker-wrapper man
+	@$(DOCKER_RUN) -t aptly-dev /work/src/system/docker-wrapper man
 
 mem.png: mem.dat mem.gp
 	gnuplot mem.gp
@@ -240,4 +240,4 @@ clean:  ## remove local build and module cache
 	rm -f unit.out aptly.test VERSION docs/docs.go docs/swagger.json docs/swagger.yaml docs/swagger.conf
 	find system/ -type d -name __pycache__ -exec rm -rf {} \; 2>/dev/null || true
 
-.PHONY: help man prepare swagger version binaries build docker-release docker-system-test docker-unit-test docker-lint docker-build docker-image docker-man docker-shell docker-serve clean releasetype dpkg serve flake8
+.PHONY: help man prepare swagger version binaries build docker-release docker-system-tests docker-unit-test docker-lint docker-build docker-image docker-man docker-shell docker-serve clean releasetype dpkg serve flake8

api/files.go

@@ -13,6 +13,10 @@ import (
 	"github.com/saracen/walker"
 )
 
+// syncFile is a seam to allow tests to force fsync failures (e.g. ENOSPC).
+// In production it calls (*os.File).Sync().
+var syncFile = func(f *os.File) error { return f.Sync() }
+
 func verifyPath(path string) bool {
 	path = filepath.Clean(path)
 	for _, part := range strings.Split(path, string(filepath.Separator)) {
@@ -114,34 +118,69 @@ func apiFilesUpload(c *gin.Context) {
 	}
 
 	stored := []string{}
+	openFiles := []*os.File{}
 
+	// Write all files first
 	for _, files := range c.Request.MultipartForm.File {
 		for _, file := range files {
 			src, err := file.Open()
 			if err != nil {
+				// Close any files we've opened
+				for _, f := range openFiles {
+					_ = f.Close()
+				}
 				AbortWithJSONError(c, 500, err)
 				return
 			}
-			defer func() { _ = src.Close() }()
 
 			destPath := filepath.Join(path, filepath.Base(file.Filename))
 			dst, err := os.Create(destPath)
 			if err != nil {
+				_ = src.Close()
+				// Close any files we've opened
+				for _, f := range openFiles {
+					_ = f.Close()
+				}
 				AbortWithJSONError(c, 500, err)
 				return
 			}
-			defer func() { _ = dst.Close() }()
 
 			_, err = io.Copy(dst, src)
+			_ = src.Close()
 			if err != nil {
+				_ = dst.Close()
+				// Close any files we've opened
+				for _, f := range openFiles {
+					_ = f.Close()
+				}
 				AbortWithJSONError(c, 500, err)
 				return
 			}
 
+			// Keep file open for batch sync
+			openFiles = append(openFiles, dst)
 			stored = append(stored, filepath.Join(c.Params.ByName("dir"), filepath.Base(file.Filename)))
 		}
 	}
 
+	// Sync all files at once to catch ENOSPC errors
+	for i, dst := range openFiles {
+		err := syncFile(dst)
+		if err != nil {
+			// Close all files
+			for _, f := range openFiles {
+				_ = f.Close()
+			}
+			AbortWithJSONError(c, 500, fmt.Errorf("error syncing file %s: %s", stored[i], err))
+			return
+		}
+	}
+
+	// Close all files
+	for _, dst := range openFiles {
+		_ = dst.Close()
+	}
+
 	apiFilesUploadedCounter.WithLabelValues(c.Params.ByName("dir")).Inc()
 	c.JSON(200, stored)
 }

api/files_test.go

@@ -0,0 +1,476 @@
+package api
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+	"mime/multipart"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strings"
+	"syscall"
+
+	"github.com/aptly-dev/aptly/aptly"
+	ctx "github.com/aptly-dev/aptly/context"
+	"github.com/gin-gonic/gin"
+	"github.com/smira/flag"
+
+	. "gopkg.in/check.v1"
+)
+
+type FilesUploadDiskFullSuite struct {
+	aptlyContext *ctx.AptlyContext
+	flags        *flag.FlagSet
+	configFile   *os.File
+	router       http.Handler
+}
+
+var _ = Suite(&FilesUploadDiskFullSuite{})
+
+func (s *FilesUploadDiskFullSuite) SetUpTest(c *C) {
+	aptly.Version = "testVersion"
+
+	file, err := os.CreateTemp("", "aptly")
+	c.Assert(err, IsNil)
+	s.configFile = file
+
+	jsonString, err := json.Marshal(gin.H{
+		"architectures": []string{},
+		"rootDir":       c.MkDir(),
+	})
+	c.Assert(err, IsNil)
+	_, err = file.Write(jsonString)
+	c.Assert(err, IsNil)
+	_ = file.Close()
+
+	flags := flag.NewFlagSet("fakeFlags", flag.ContinueOnError)
+	flags.Bool("no-lock", false, "dummy")
+	flags.Int("db-open-attempts", 3, "dummy")
+	flags.String("config", s.configFile.Name(), "dummy")
+	flags.String("architectures", "", "dummy")
+	s.flags = flags
+
+	aptlyContext, err := ctx.NewContext(s.flags)
+	c.Assert(err, IsNil)
+
+	s.aptlyContext = aptlyContext
+	s.router = Router(aptlyContext)
+	context = aptlyContext
+}
+
+func (s *FilesUploadDiskFullSuite) TearDownTest(c *C) {
+	if s.configFile != nil {
+		_ = os.Remove(s.configFile.Name())
+	}
+	if s.aptlyContext != nil {
+		s.aptlyContext.Shutdown()
+	}
+}
+
+func (s *FilesUploadDiskFullSuite) TestUploadSuccessWithSync(c *C) {
+	testContent := []byte("test file content for upload")
+
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+
+	part, err := writer.CreateFormFile("file", "testfile.txt")
+	c.Assert(err, IsNil)
+
+	_, err = part.Write(testContent)
+	c.Assert(err, IsNil)
+
+	err = writer.Close()
+	c.Assert(err, IsNil)
+
+	req, err := http.NewRequest("POST", "/api/files/testdir", body)
+	c.Assert(err, IsNil)
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 200)
+
+	uploadedFile := filepath.Join(s.aptlyContext.Config().GetRootDir(), "upload", "testdir", "testfile.txt")
+	content, err := os.ReadFile(uploadedFile)
+	c.Assert(err, IsNil)
+	c.Check(content, DeepEquals, testContent)
+}
+
+func (s *FilesUploadDiskFullSuite) TestUploadVerifiesFileIntegrity(c *C) {
+	testContent := bytes.Repeat([]byte("A"), 10000)
+
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+
+	part, err := writer.CreateFormFile("file", "largefile.bin")
+	c.Assert(err, IsNil)
+
+	_, err = io.Copy(part, bytes.NewReader(testContent))
+	c.Assert(err, IsNil)
+
+	err = writer.Close()
+	c.Assert(err, IsNil)
+
+	req, err := http.NewRequest("POST", "/api/files/testdir2", body)
+	c.Assert(err, IsNil)
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+
+	c.Assert(w.Code, Equals, 200)
+
+	uploadedFile := filepath.Join(s.aptlyContext.Config().GetRootDir(), "upload", "testdir2", "largefile.bin")
+	content, err := os.ReadFile(uploadedFile)
+	c.Assert(err, IsNil)
+	c.Check(len(content), Equals, len(testContent))
+	c.Check(content, DeepEquals, testContent)
+}
+
+func (s *FilesUploadDiskFullSuite) TestUploadMultipleFilesWithBatchSync(c *C) {
+	testFiles := map[string][]byte{
+		"file1.txt": []byte("content of file 1"),
+		"file2.txt": bytes.Repeat([]byte("B"), 5000),
+		"file3.deb": []byte("debian package content"),
+	}
+
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+
+	for filename, content := range testFiles {
+		part, err := writer.CreateFormFile("file", filename)
+		c.Assert(err, IsNil)
+		_, err = part.Write(content)
+		c.Assert(err, IsNil)
+	}
+
+	err := writer.Close()
+	c.Assert(err, IsNil)
+
+	req, err := http.NewRequest("POST", "/api/files/multitest", body)
+	c.Assert(err, IsNil)
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+
+	c.Assert(w.Code, Equals, 200)
+
+	uploadDir := filepath.Join(s.aptlyContext.Config().GetRootDir(), "upload", "multitest")
+	for filename, expectedContent := range testFiles {
+		uploadedFile := filepath.Join(uploadDir, filename)
+		content, err := os.ReadFile(uploadedFile)
+		c.Assert(err, IsNil, Commentf("Failed to read %s", filename))
+		c.Check(content, DeepEquals, expectedContent, Commentf("Content mismatch for %s", filename))
+	}
+}
+
+func (s *FilesUploadDiskFullSuite) TestUploadReturnsErrorOnSyncFailure(c *C) {
+	oldSyncFile := syncFile
+	syncFile = func(f *os.File) error {
+		if filepath.Base(f.Name()) == "syncfail.txt" {
+			return syscall.ENOSPC
+		}
+		return nil
+	}
+	defer func() { syncFile = oldSyncFile }()
+
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+
+	part1, err := writer.CreateFormFile("file", "ok.txt")
+	c.Assert(err, IsNil)
+	_, err = part1.Write([]byte("ok"))
+	c.Assert(err, IsNil)
+
+	part2, err := writer.CreateFormFile("file", "syncfail.txt")
+	c.Assert(err, IsNil)
+	_, err = part2.Write([]byte("will fail on sync"))
+	c.Assert(err, IsNil)
+
+	err = writer.Close()
+	c.Assert(err, IsNil)
+
+	req, err := http.NewRequest("POST", "/api/files/syncfaildir", body)
+	c.Assert(err, IsNil)
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+
+	c.Assert(w.Code, Equals, 500)
+	c.Check(bytes.Contains(w.Body.Bytes(), []byte("error syncing file")), Equals, true)
+}
+
+func (s *FilesUploadDiskFullSuite) TestVerifyPath(c *C) {
+	c.Check(verifyPath("a/b/c"), Equals, true)
+	c.Check(verifyPath("../x"), Equals, false)
+	c.Check(verifyPath("./x"), Equals, true)
+	c.Check(verifyPath(".."), Equals, false)
+	c.Check(verifyPath("."), Equals, false)
+}
+
+func (s *FilesUploadDiskFullSuite) TestListDirsEmptyWhenUploadMissing(c *C) {
+	_ = os.RemoveAll(s.aptlyContext.UploadPath())
+
+	req, err := http.NewRequest("GET", "/api/files", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+
+	c.Assert(w.Code, Equals, 200)
+	c.Check(strings.TrimSpace(w.Body.String()), Equals, "[]")
+}
+
+func (s *FilesUploadDiskFullSuite) TestListDirsReturnsDirectories(c *C) {
+	uploadRoot := s.aptlyContext.UploadPath()
+	c.Assert(os.MkdirAll(filepath.Join(uploadRoot, "d1"), 0777), IsNil)
+	c.Assert(os.MkdirAll(filepath.Join(uploadRoot, "d2"), 0777), IsNil)
+	c.Assert(os.WriteFile(filepath.Join(uploadRoot, "rootfile"), []byte("x"), 0644), IsNil)
+
+	req, err := http.NewRequest("GET", "/api/files", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+
+	c.Assert(w.Code, Equals, 200)
+	body := w.Body.String()
+	c.Check(strings.Contains(body, "d1"), Equals, true)
+	c.Check(strings.Contains(body, "d2"), Equals, true)
+}
+
+func (s *FilesUploadDiskFullSuite) TestListFilesNotFound(c *C) {
+	req, err := http.NewRequest("GET", "/api/files/does-not-exist", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 404)
+}
+
+func (s *FilesUploadDiskFullSuite) TestListFilesReturnsFiles(c *C) {
+	base := filepath.Join(s.aptlyContext.UploadPath(), "dir")
+	c.Assert(os.MkdirAll(base, 0777), IsNil)
+	c.Assert(os.WriteFile(filepath.Join(base, "a.txt"), []byte("a"), 0644), IsNil)
+	c.Assert(os.WriteFile(filepath.Join(base, "b.txt"), []byte("b"), 0644), IsNil)
+
+	req, err := http.NewRequest("GET", "/api/files/dir", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+
+	c.Assert(w.Code, Equals, 200)
+	body := w.Body.String()
+	c.Check(strings.Contains(body, "a.txt"), Equals, true)
+	c.Check(strings.Contains(body, "b.txt"), Equals, true)
+}
+
+func (s *FilesUploadDiskFullSuite) TestDeleteDirRemovesDirectory(c *C) {
+	base := filepath.Join(s.aptlyContext.UploadPath(), "todel")
+	c.Assert(os.MkdirAll(base, 0777), IsNil)
+	c.Assert(os.WriteFile(filepath.Join(base, "a.txt"), []byte("a"), 0644), IsNil)
+
+	req, err := http.NewRequest("DELETE", "/api/files/todel", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 200)
+
+	_, statErr := os.Stat(base)
+	c.Check(os.IsNotExist(statErr), Equals, true)
+}
+
+func (s *FilesUploadDiskFullSuite) TestDeleteFileRemovesFile(c *C) {
+	base := filepath.Join(s.aptlyContext.UploadPath(), "todel2")
+	c.Assert(os.MkdirAll(base, 0777), IsNil)
+	c.Assert(os.WriteFile(filepath.Join(base, "a.txt"), []byte("a"), 0644), IsNil)
+
+	req, err := http.NewRequest("DELETE", "/api/files/todel2/a.txt", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 200)
+
+	_, statErr := os.Stat(filepath.Join(base, "a.txt"))
+	c.Check(os.IsNotExist(statErr), Equals, true)
+}
+
+func (s *FilesUploadDiskFullSuite) TestDeleteFileNotFoundStillOk(c *C) {
+	base := filepath.Join(s.aptlyContext.UploadPath(), "todel3")
+	c.Assert(os.MkdirAll(base, 0777), IsNil)
+
+	req, err := http.NewRequest("DELETE", "/api/files/todel3/nope.txt", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 200)
+}
+
+func (s *FilesUploadDiskFullSuite) TestRejectsInvalidDir(c *C) {
+	req, err := http.NewRequest("DELETE", "/api/files/..", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 400)
+}
+
+func (s *FilesUploadDiskFullSuite) TestRejectsInvalidFileName(c *C) {
+	base := filepath.Join(s.aptlyContext.UploadPath(), "dirx")
+	c.Assert(os.MkdirAll(base, 0777), IsNil)
+
+	req, err := http.NewRequest("DELETE", "/api/files/dirx/..", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 400)
+}
+
+func (s *FilesUploadDiskFullSuite) TestListDirsEmptyIfUploadPathIsNotDir(c *C) {
+	_ = os.RemoveAll(s.aptlyContext.UploadPath())
+	c.Assert(os.WriteFile(s.aptlyContext.UploadPath(), []byte("not a dir"), 0644), IsNil)
+
+	req, err := http.NewRequest("GET", "/api/files", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+
+	c.Assert(w.Code, Equals, 200)
+	c.Check(strings.TrimSpace(w.Body.String()), Equals, "[]")
+}
+
+func (s *FilesUploadDiskFullSuite) TestListFilesReturns500OnPermissionError(c *C) {
+	base := filepath.Join(s.aptlyContext.UploadPath(), "noperms")
+	c.Assert(os.MkdirAll(base, 0777), IsNil)
+	c.Assert(os.WriteFile(filepath.Join(base, "a.txt"), []byte("a"), 0644), IsNil)
+	c.Assert(os.Chmod(base, 0), IsNil)
+	defer func() { _ = os.Chmod(base, 0777) }()
+
+	req, err := http.NewRequest("GET", "/api/files/noperms", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+
+	c.Assert(w.Code, Equals, 500)
+}
+
+func (s *FilesUploadDiskFullSuite) TestDeleteFileReturns500OnNonNotExistError(c *C) {
+	base := filepath.Join(s.aptlyContext.UploadPath(), "dirisfile")
+	c.Assert(os.MkdirAll(base, 0777), IsNil)
+	subdir := filepath.Join(base, "subdir")
+	c.Assert(os.MkdirAll(subdir, 0777), IsNil)
+	c.Assert(os.WriteFile(filepath.Join(subdir, "x"), []byte("x"), 0644), IsNil)
+
+	req, err := http.NewRequest("DELETE", "/api/files/dirisfile/subdir", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+
+	c.Assert(w.Code, Equals, 500)
+}
+
+func (s *FilesUploadDiskFullSuite) TestUploadBadMultipartReturns400(c *C) {
+	req, err := http.NewRequest("POST", "/api/files/badmultipart", bytes.NewBufferString("not multipart"))
+	c.Assert(err, IsNil)
+	req.Header.Set("Content-Type", "multipart/form-data; boundary=missing")
+
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+
+	c.Assert(w.Code, Equals, 400)
+}
+
+func (s *FilesUploadDiskFullSuite) TestUploadRejectsInvalidDir(c *C) {
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+	part, err := writer.CreateFormFile("file", "a.txt")
+	c.Assert(err, IsNil)
+	_, err = part.Write([]byte("x"))
+	c.Assert(err, IsNil)
+	c.Assert(writer.Close(), IsNil)
+
+	req, err := http.NewRequest("POST", "/api/files/..", body)
+	c.Assert(err, IsNil)
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 400)
+}
+
+func (s *FilesUploadDiskFullSuite) TestUploadReturns500IfUploadRootIsNotDir(c *C) {
+	_ = os.RemoveAll(s.aptlyContext.UploadPath())
+	c.Assert(os.WriteFile(s.aptlyContext.UploadPath(), []byte("not a dir"), 0644), IsNil)
+
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+	part, err := writer.CreateFormFile("file", "a.txt")
+	c.Assert(err, IsNil)
+	_, err = part.Write([]byte("x"))
+	c.Assert(err, IsNil)
+	c.Assert(writer.Close(), IsNil)
+
+	req, err := http.NewRequest("POST", "/api/files/testdir", body)
+	c.Assert(err, IsNil)
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 500)
+}
+
+func (s *FilesUploadDiskFullSuite) TestUploadReturns500OnFileOpenFailure(c *C) {
+	// Pre-populate MultipartForm to inject a FileHeader that fails on Open().
+	form := &multipart.Form{
+		File: map[string][]*multipart.FileHeader{
+			"file": {{Filename: "broken.bin"}},
+		},
+	}
+
+	req, err := http.NewRequest("POST", "/api/files/openfaildir", nil)
+	c.Assert(err, IsNil)
+	req.MultipartForm = form
+
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 500)
+}
+
+func (s *FilesUploadDiskFullSuite) TestUploadReturns500OnCreateFailure(c *C) {
+	base := filepath.Join(s.aptlyContext.UploadPath(), "readonly")
+	c.Assert(os.MkdirAll(base, 0777), IsNil)
+	c.Assert(os.Chmod(base, 0555), IsNil)
+	defer func() { _ = os.Chmod(base, 0777) }()
+
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+	part, err := writer.CreateFormFile("file", "a.txt")
+	c.Assert(err, IsNil)
+	_, err = part.Write([]byte("x"))
+	c.Assert(err, IsNil)
+	c.Assert(writer.Close(), IsNil)
+
+	req, err := http.NewRequest("POST", "/api/files/readonly", body)
+	c.Assert(err, IsNil)
+	req.Header.Set("Content-Type", writer.FormDataContentType())
+
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 500)
+}
+
+func (s *FilesUploadDiskFullSuite) TestDeleteDirReturns500OnRemoveFailure(c *C) {
+	parent := s.aptlyContext.UploadPath()
+	base := filepath.Join(parent, "cantremove")
+	c.Assert(os.MkdirAll(base, 0777), IsNil)
+	c.Assert(os.WriteFile(filepath.Join(base, "a.txt"), []byte("a"), 0644), IsNil)
+
+	c.Assert(os.Chmod(parent, 0555), IsNil)
+	defer func() { _ = os.Chmod(parent, 0777) }()
+
+	req, err := http.NewRequest("DELETE", "/api/files/cantremove", nil)
+	c.Assert(err, IsNil)
+	w := httptest.NewRecorder()
+	s.router.ServeHTTP(w, req)
+	c.Assert(w.Code, Equals, 500)
+}

files/public.go

@@ -15,6 +15,10 @@ import (
 	"github.com/saracen/walker"
 )
 
+// syncFile is a seam to allow tests to force fsync failures (e.g. ENOSPC).
+// In production it calls (*os.File).Sync().
+var syncFile = func(f *os.File) error { return f.Sync() }
+
 // PublishedStorage abstract file system with public dirs (published repos)
 type PublishedStorage struct {
 	rootPath     string
@@ -25,7 +29,7 @@ type PublishedStorage struct {
 // Global mutex map to prevent concurrent access to the same destinationPath in LinkFromPool
 var (
 	fileLockMutex sync.Mutex
-	fileLocks = make(map[string]*sync.Mutex)
+	fileLocks     = make(map[string]*sync.Mutex)
 )
 
 // getFileLock returns a mutex for a specific file path to prevent concurrent modifications
@@ -119,7 +123,17 @@ func (storage *PublishedStorage) PutFile(path string, sourceFilename string) err
 	}()
 
 	_, err = io.Copy(f, source)
-	return err
+	if err != nil {
+		return err
+	}
+
+	// Sync to ensure all data is written to disk and catch ENOSPC errors
+	err = syncFile(f)
+	if err != nil {
+		return fmt.Errorf("error syncing file %s: %s", path, err)
+	}
+
+	return nil
 }
 
 // Remove removes single file under public path
@@ -268,6 +282,13 @@ func (storage *PublishedStorage) LinkFromPool(publishedPrefix, publishedRelPath,
 			return err
 		}
 
+		// Sync to ensure all data is written to disk and catch ENOSPC errors
+		err = syncFile(dst)
+		if err != nil {
+			_ = dst.Close()
+			return fmt.Errorf("error syncing file %s: %s", destinationPath, err)
+		}
+
 		err = dst.Close()
 	} else if storage.linkMethod == LinkMethodSymLink {
 		err = localSourcePool.Symlink(sourcePath, destinationPath)

files/public_test.go

@@ -1,8 +1,14 @@
 package files
 
 import (
+	"bytes"
+	"errors"
+	"io"
 	"os"
+	"os/exec"
 	"path/filepath"
+	"runtime"
+	"strings"
 	"syscall"
 
 	"github.com/aptly-dev/aptly/aptly"
@@ -11,6 +17,77 @@ import (
 	. "gopkg.in/check.v1"
 )
 
+type fakeProgress struct{ bytes.Buffer }
+
+func (p *fakeProgress) Start()    {}
+func (p *fakeProgress) Shutdown() {}
+func (p *fakeProgress) Flush()    {}
+func (p *fakeProgress) InitBar(count int64, isBytes bool, barType aptly.BarType) {
+}
+func (p *fakeProgress) ShutdownBar()     {}
+func (p *fakeProgress) AddBar(count int) {}
+func (p *fakeProgress) SetBar(count int) {}
+func (p *fakeProgress) Printf(msg string, a ...interface{}) {
+}
+func (p *fakeProgress) ColoredPrintf(msg string, a ...interface{}) {
+}
+func (p *fakeProgress) PrintfStdErr(msg string, a ...interface{}) {
+}
+
+type fakeRSC struct {
+	*bytes.Reader
+	closeErr error
+}
+
+func (r *fakeRSC) Close() error { return r.closeErr }
+
+type fakePool struct {
+	sizeErr error
+	openFn  func(string) (aptly.ReadSeekerCloser, error)
+}
+
+type fakeLocalPool struct {
+	fakePool
+	statErr error
+}
+
+func (p *fakeLocalPool) Stat(path string) (os.FileInfo, error) { return nil, p.statErr }
+func (p *fakeLocalPool) GenerateTempPath(filename string) (string, error) {
+	return "", nil
+}
+func (p *fakeLocalPool) Link(path, dstPath string) error    { return nil }
+func (p *fakeLocalPool) Symlink(path, dstPath string) error { return nil }
+func (p *fakeLocalPool) FullPath(path string) string        { return path }
+
+func (p *fakePool) Verify(poolPath, basename string, checksums *utils.ChecksumInfo, checksumStorage aptly.ChecksumStorage) (string, bool, error) {
+	return "", false, nil
+}
+
+func (p *fakePool) Import(srcPath, basename string, checksums *utils.ChecksumInfo, move bool, storage aptly.ChecksumStorage) (string, error) {
+	return "", nil
+}
+
+func (p *fakePool) LegacyPath(filename string, checksums *utils.ChecksumInfo) (string, error) {
+	return "", nil
+}
+
+func (p *fakePool) Size(path string) (int64, error) {
+	if p.sizeErr != nil {
+		return 0, p.sizeErr
+	}
+	return int64(len(path)), nil
+}
+
+func (p *fakePool) Open(path string) (aptly.ReadSeekerCloser, error) {
+	if p.openFn != nil {
+		return p.openFn(path)
+	}
+	return nil, io.EOF
+}
+
+func (p *fakePool) FilepathList(progress aptly.Progress) ([]string, error) { return nil, nil }
+func (p *fakePool) Remove(path string) (int64, error)                      { return 0, nil }
+
 type PublishedStorageSuite struct {
 	root            string
 	storage         *PublishedStorage
@@ -69,6 +146,14 @@ func (s *PublishedStorageSuite) TestPutFile(c *C) {
 	c.Assert(err, IsNil)
 }
 
+func (s *PublishedStorageSuite) TestPutFileReturnsErrorIfSourceMissing(c *C) {
+	err := s.storage.MkDir("ppa/dists/squeeze/")
+	c.Assert(err, IsNil)
+
+	err = s.storage.PutFile("ppa/dists/squeeze/Release", filepath.Join(s.root, "no-such-file"))
+	c.Assert(err, NotNil)
+}
+
 func (s *PublishedStorageSuite) TestFilelist(c *C) {
 	err := s.storage.MkDir("ppa/pool/main/a/ab/")
 	c.Assert(err, IsNil)
@@ -134,6 +219,11 @@ func (s *PublishedStorageSuite) TestSymLink(c *C) {
 	c.Assert(linkTarget, Equals, "ppa/dists/squeeze/Release")
 }
 
+func (s *PublishedStorageSuite) TestReadLinkReturnsErrorOnMissingPath(c *C) {
+	_, err := s.storage.ReadLink("does/not/exist")
+	c.Assert(err, NotNil)
+}
+
 func (s *PublishedStorageSuite) TestHardLink(c *C) {
 	err := s.storage.MkDir("ppa/dists/squeeze/")
 	c.Assert(err, IsNil)
@@ -163,6 +253,18 @@ func (s *PublishedStorageSuite) TestRemoveDirs(c *C) {
 	c.Assert(os.IsNotExist(err), Equals, true)
 }
 
+func (s *PublishedStorageSuite) TestRemoveDirsWithProgress(c *C) {
+	err := s.storage.MkDir("ppa/dists/squeeze/")
+	c.Assert(err, IsNil)
+
+	err = s.storage.PutFile("ppa/dists/squeeze/Release", "/dev/null")
+	c.Assert(err, IsNil)
+
+	p := &fakeProgress{}
+	err = s.storage.RemoveDirs("ppa/dists/", p)
+	c.Assert(err, IsNil)
+}
+
 func (s *PublishedStorageSuite) TestRemove(c *C) {
 	err := s.storage.MkDir("ppa/dists/squeeze/")
 	c.Assert(err, IsNil)
@@ -337,3 +439,287 @@ func (s *PublishedStorageSuite) TestRootRemove(c *C) {
 	dirStorage := NewPublishedStorage(pwd, "", "")
 	c.Assert(func() { _ = dirStorage.RemoveDirs("", nil) }, PanicMatches, "trying to remove the root directory")
 }
+
+// DiskFullSuite uses a loopback mount; requires Linux + root.
+
+type DiskFullSuite struct {
+	root string
+}
+
+var _ = Suite(&DiskFullSuite{})
+
+func (s *DiskFullSuite) SetUpTest(c *C) {
+	if runtime.GOOS != "linux" {
+		c.Skip("disk full tests only run on Linux")
+	}
+
+	s.root = c.MkDir()
+}
+
+func (s *DiskFullSuite) TestPutFileOutOfSpace(c *C) {
+	mountPoint := "/smallfs"
+	if os.Geteuid() == 0 {
+		mountPoint = filepath.Join(s.root, "smallfs")
+		err := os.MkdirAll(mountPoint, 0777)
+		c.Assert(err, IsNil)
+		fsImage := filepath.Join(s.root, "small.img")
+		cmd := exec.Command("dd", "if=/dev/zero", "of="+fsImage, "bs=1M", "count=1")
+		err = cmd.Run()
+		c.Assert(err, IsNil)
+		cmd = exec.Command("mkfs.ext4", "-F", fsImage)
+		err = cmd.Run()
+		c.Assert(err, IsNil)
+		cmd = exec.Command("mount", "-o", "loop", fsImage, mountPoint)
+		err = cmd.Run()
+		c.Assert(err, IsNil)
+		defer func() {
+			_ = exec.Command("umount", mountPoint).Run()
+		}()
+	}
+
+	storage := NewPublishedStorage(mountPoint, "", "")
+	largeFile := filepath.Join(s.root, "largefile")
+	cmd := exec.Command("dd", "if=/dev/zero", "of="+largeFile, "bs=1M", "count=2")
+	err := cmd.Run()
+	c.Assert(err, IsNil)
+
+	err = storage.PutFile("testfile", largeFile)
+	c.Assert(err, NotNil)
+	c.Check(strings.Contains(err.Error(), "no space left on device") ||
+		strings.Contains(err.Error(), "sync"), Equals, true,
+		Commentf("Expected disk full error, got: %v", err))
+}
+
+func (s *DiskFullSuite) TestLinkFromPoolCopyOutOfSpace(c *C) {
+	mountPoint := "/smallfs"
+	if os.Geteuid() == 0 {
+		mountPoint = filepath.Join(s.root, "smallfs")
+		err := os.MkdirAll(mountPoint, 0777)
+		c.Assert(err, IsNil)
+		fsImage := filepath.Join(s.root, "small.img")
+
+		cmd := exec.Command("dd", "if=/dev/zero", "of="+fsImage, "bs=1M", "count=1")
+		err = cmd.Run()
+		c.Assert(err, IsNil)
+
+		cmd = exec.Command("mkfs.ext4", "-F", fsImage)
+		err = cmd.Run()
+		c.Assert(err, IsNil)
+
+		cmd = exec.Command("mount", "-o", "loop", fsImage, mountPoint)
+		err = cmd.Run()
+		c.Assert(err, IsNil)
+		defer func() {
+			_ = exec.Command("umount", mountPoint).Run()
+		}()
+	}
+
+	storage := NewPublishedStorage(mountPoint, "copy", "")
+
+	poolPath := filepath.Join(s.root, "pool")
+	pool := NewPackagePool(poolPath, false)
+	cs := NewMockChecksumStorage()
+
+	largeFile := filepath.Join(s.root, "package.deb")
+	cmd := exec.Command("dd", "if=/dev/zero", "of="+largeFile, "bs=1M", "count=2")
+	err := cmd.Run()
+	c.Assert(err, IsNil)
+
+	sourceChecksum, err := utils.ChecksumsForFile(largeFile)
+	c.Assert(err, IsNil)
+
+	srcPoolPath, err := pool.Import(largeFile, "package.deb",
+		&utils.ChecksumInfo{MD5: "d41d8cd98f00b204e9800998ecf8427e"}, false, cs)
+	c.Assert(err, IsNil)
+
+	err = storage.LinkFromPool("", "pool/main/p/package", "package.deb",
+		pool, srcPoolPath, sourceChecksum, false)
+	c.Assert(err, NotNil)
+	c.Check(strings.Contains(err.Error(), "no space left on device") ||
+		strings.Contains(err.Error(), "sync"), Equals, true,
+		Commentf("Expected disk full error, got: %v", err))
+}
+
+type DiskFullNoRootSuite struct {
+	root string
+}
+
+var _ = Suite(&DiskFullNoRootSuite{})
+
+func (s *DiskFullNoRootSuite) SetUpTest(c *C) {
+	s.root = c.MkDir()
+}
+
+func (s *DiskFullNoRootSuite) TestSyncIsCalled(c *C) {
+	storage := NewPublishedStorage(s.root, "", "")
+	sourceFile := filepath.Join(s.root, "source.txt")
+	err := os.WriteFile(sourceFile, []byte("test content"), 0644)
+	c.Assert(err, IsNil)
+	err = storage.PutFile("dest.txt", sourceFile)
+	c.Assert(err, IsNil)
+	content, err := os.ReadFile(filepath.Join(s.root, "dest.txt"))
+	c.Assert(err, IsNil)
+	c.Check(string(content), Equals, "test content")
+}
+
+func (s *DiskFullNoRootSuite) TestLinkFromPoolCopySyncIsCalled(c *C) {
+	storage := NewPublishedStorage(s.root, "copy", "")
+	poolPath := filepath.Join(s.root, "pool")
+	pool := NewPackagePool(poolPath, false)
+	cs := NewMockChecksumStorage()
+
+	pkgFile := filepath.Join(s.root, "package.deb")
+	err := os.WriteFile(pkgFile, []byte("package content"), 0644)
+	c.Assert(err, IsNil)
+
+	sourceChecksum, err := utils.ChecksumsForFile(pkgFile)
+	c.Assert(err, IsNil)
+
+	srcPoolPath, err := pool.Import(pkgFile, "package.deb",
+		&utils.ChecksumInfo{MD5: "d41d8cd98f00b204e9800998ecf8427e"}, false, cs)
+	c.Assert(err, IsNil)
+
+	err = storage.LinkFromPool("", "pool/main/p/package", "package.deb",
+		pool, srcPoolPath, sourceChecksum, false)
+	c.Assert(err, IsNil)
+
+	destPath := filepath.Join(s.root, "pool/main/p/package/package.deb")
+	content, err := os.ReadFile(destPath)
+	c.Assert(err, IsNil)
+	c.Check(string(content), Equals, "package content")
+}
+
+func (s *DiskFullNoRootSuite) TestPutFileSyncErrorIsReturned(c *C) {
+	storage := NewPublishedStorage(s.root, "", "")
+
+	sourceFile := filepath.Join(s.root, "source-syncfail.txt")
+	err := os.WriteFile(sourceFile, []byte("test content"), 0644)
+	c.Assert(err, IsNil)
+
+	oldSyncFile := syncFile
+	syncFile = func(_ *os.File) error { return syscall.ENOSPC }
+	defer func() { syncFile = oldSyncFile }()
+
+	err = storage.PutFile("dest-syncfail.txt", sourceFile)
+	c.Assert(err, NotNil)
+	c.Check(strings.Contains(err.Error(), "error syncing file"), Equals, true)
+}
+
+func (s *DiskFullNoRootSuite) TestLinkFromPoolCopySyncErrorIsReturned(c *C) {
+	storage := NewPublishedStorage(s.root, "copy", "")
+	poolPath := filepath.Join(s.root, "pool")
+	pool := NewPackagePool(poolPath, false)
+	cs := NewMockChecksumStorage()
+
+	pkgFile := filepath.Join(s.root, "package-syncfail.deb")
+	err := os.WriteFile(pkgFile, []byte("package content"), 0644)
+	c.Assert(err, IsNil)
+
+	sourceChecksum, err := utils.ChecksumsForFile(pkgFile)
+	c.Assert(err, IsNil)
+
+	srcPoolPath, err := pool.Import(pkgFile, "package-syncfail.deb",
+		&utils.ChecksumInfo{MD5: "d41d8cd98f00b204e9800998ecf8427e"}, false, cs)
+	c.Assert(err, IsNil)
+
+	oldSyncFile := syncFile
+	syncFile = func(_ *os.File) error { return syscall.ENOSPC }
+	defer func() { syncFile = oldSyncFile }()
+
+	err = storage.LinkFromPool("", "pool/main/p/package", "package-syncfail.deb",
+		pool, srcPoolPath, sourceChecksum, false)
+	c.Assert(err, NotNil)
+	c.Check(strings.Contains(err.Error(), "error syncing file"), Equals, true)
+}
+
+func (s *DiskFullNoRootSuite) TestGetFileLockReusesMutex(c *C) {
+	a := getFileLock(filepath.Join(s.root, "a"))
+	b := getFileLock(filepath.Join(s.root, "a"))
+	c.Check(a == b, Equals, true)
+
+	c1 := getFileLock(filepath.Join(s.root, "c1"))
+	c2 := getFileLock(filepath.Join(s.root, "c2"))
+	c.Check(c1 == c2, Equals, false)
+}
+
+func (s *DiskFullNoRootSuite) TestPutFileFailsIfDestinationDirMissing(c *C) {
+	storage := NewPublishedStorage(s.root, "", "")
+
+	sourceFile := filepath.Join(s.root, "src.txt")
+	err := os.WriteFile(sourceFile, []byte("x"), 0644)
+	c.Assert(err, IsNil)
+
+	err = storage.PutFile("missingdir/dest.txt", sourceFile)
+	c.Assert(err, NotNil)
+}
+
+func (s *DiskFullNoRootSuite) TestLinkFromPoolRejectsNonLocalPoolForHardlink(c *C) {
+	storage := NewPublishedStorage(s.root, "", "")
+	pool := &fakePool{}
+
+	err := storage.LinkFromPool("", "pool/main/p/pkg", "x.deb", pool, "x", utils.ChecksumInfo{MD5: "x"}, false)
+	c.Assert(err, NotNil)
+	c.Check(strings.Contains(err.Error(), "cannot link"), Equals, true)
+}
+
+func (s *DiskFullNoRootSuite) TestLinkFromPoolCopyReturnsErrorIfOpenFails(c *C) {
+	storage := NewPublishedStorage(s.root, "copy", "")
+	pool := &fakePool{openFn: func(string) (aptly.ReadSeekerCloser, error) { return nil, io.ErrUnexpectedEOF }}
+
+	err := storage.LinkFromPool("", "pool/main/p/pkg", "x.deb", pool, "x", utils.ChecksumInfo{MD5: "x"}, false)
+	c.Assert(err, NotNil)
+}
+
+func (s *DiskFullNoRootSuite) TestLinkFromPoolCopyReturnsErrorIfReaderCloseFails(c *C) {
+	storage := NewPublishedStorage(s.root, "copy", "")
+
+	pool := &fakePool{openFn: func(string) (aptly.ReadSeekerCloser, error) {
+		return &fakeRSC{Reader: bytes.NewReader([]byte("data")), closeErr: io.ErrClosedPipe}, nil
+	}}
+
+	err := storage.LinkFromPool("", "pool/main/p/pkg", "x.deb", pool, "x", utils.ChecksumInfo{MD5: "x"}, false)
+	c.Assert(err, NotNil)
+	c.Check(err, Equals, io.ErrClosedPipe)
+}
+
+func (s *DiskFullNoRootSuite) TestLinkFromPoolCopyReturnsErrorIfSizeFailsWhenDestExists(c *C) {
+	storage := NewPublishedStorage(s.root, "copy", "size")
+	pool := &fakePool{sizeErr: io.ErrUnexpectedEOF, openFn: func(string) (aptly.ReadSeekerCloser, error) {
+		return &fakeRSC{Reader: bytes.NewReader([]byte("data")), closeErr: nil}, nil
+	}}
+
+	destDir := filepath.Join(s.root, "pool/main/p/pkg")
+	c.Assert(os.MkdirAll(destDir, 0777), IsNil)
+	c.Assert(os.WriteFile(filepath.Join(destDir, "x.deb"), []byte("old"), 0644), IsNil)
+
+	err := storage.LinkFromPool("", "pool/main/p/pkg", "x.deb", pool, "x", utils.ChecksumInfo{MD5: "x"}, false)
+	c.Assert(err, NotNil)
+	c.Check(err, Equals, io.ErrUnexpectedEOF)
+}
+
+func (s *DiskFullNoRootSuite) TestLinkFromPoolCopyChecksumReturnsErrorIfDstMD5Fails(c *C) {
+	storage := NewPublishedStorage(s.root, "copy", "")
+	pool := &fakePool{openFn: func(string) (aptly.ReadSeekerCloser, error) {
+		return &fakeRSC{Reader: bytes.NewReader([]byte("data")), closeErr: nil}, nil
+	}}
+
+	// Make destinationPath a directory so MD5ChecksumForFile fails.
+	destDir := filepath.Join(s.root, "pool/main/p/pkg")
+	c.Assert(os.MkdirAll(destDir, 0777), IsNil)
+	c.Assert(os.MkdirAll(filepath.Join(destDir, "x.deb"), 0777), IsNil)
+
+	err := storage.LinkFromPool("", "pool/main/p/pkg", "x.deb", pool, "x", utils.ChecksumInfo{MD5: "x"}, false)
+	c.Assert(err, NotNil)
+}
+
+func (s *DiskFullNoRootSuite) TestLinkFromPoolHardlinkReturnsErrorIfStatFailsWhenDestExists(c *C) {
+	storage := NewPublishedStorage(c.MkDir(), "hardlink", "")
+	pool := &fakeLocalPool{statErr: errors.New("stat failed")}
+
+	destDir := filepath.Join(storage.rootPath, "pool", "main", "p", "pkg")
+	c.Assert(os.MkdirAll(destDir, 0777), IsNil)
+	c.Assert(os.WriteFile(filepath.Join(destDir, "x.deb"), []byte("x"), 0644), IsNil)
+
+	err := storage.LinkFromPool("", "pool/main/p/pkg", "x.deb", pool, "x", utils.ChecksumInfo{MD5: "x"}, false)
+	c.Assert(err, NotNil)
+}