Remove deprecated io/ioutil (#15707)

cmd/admin-bucket-handlers.go

@@ -25,7 +25,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"strings"
 	"time"
@@ -74,7 +73,7 @@ func (a adminAPIHandlers) PutBucketQuotaConfigHandler(w http.ResponseWriter, r *
 		return
 	}
 
-	data, err := ioutil.ReadAll(r.Body)
+	data, err := io.ReadAll(r.Body)
 	if err != nil {
 		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)
 		return
@@ -671,7 +670,7 @@ func (a adminAPIHandlers) ImportBucketMetadataHandler(w http.ResponseWriter, r *
 	if objectAPI == nil {
 		return
 	}
-	data, err := ioutil.ReadAll(r.Body)
+	data, err := io.ReadAll(r.Body)
 	if err != nil {
 		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)
 		return
@@ -871,7 +870,7 @@ func (a adminAPIHandlers) ImportBucketMetadataHandler(w http.ResponseWriter, r *
 				continue
 			}
 
-			bucketPolicyBytes, err := ioutil.ReadAll(io.LimitReader(reader, sz))
+			bucketPolicyBytes, err := io.ReadAll(io.LimitReader(reader, sz))
 			if err != nil {
 				rpt.SetStatus(bucket, fileName, err)
 				continue
@@ -1032,7 +1031,7 @@ func (a adminAPIHandlers) ImportBucketMetadataHandler(w http.ResponseWriter, r *
 				continue
 			}
 		case bucketQuotaConfigFile:
-			data, err := ioutil.ReadAll(reader)
+			data, err := io.ReadAll(reader)
 			if err != nil {
 				rpt.SetStatus(bucket, fileName, err)
 				continue

cmd/admin-handlers-site-replication.go

@@ -22,7 +22,6 @@ import (
 	"context"
 	"encoding/json"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"strings"
 	"time"
@@ -319,7 +318,7 @@ func (a adminAPIHandlers) SRPeerGetIDPSettings(w http.ResponseWriter, r *http.Re
 }
 
 func parseJSONBody(ctx context.Context, body io.Reader, v interface{}, encryptionKey string) error {
-	data, err := ioutil.ReadAll(body)
+	data, err := io.ReadAll(body)
 	if err != nil {
 		return SRError{
 			Cause: err,

cmd/admin-handlers-users.go

@@ -22,7 +22,6 @@ import (
 	"encoding/json"
 	"errors"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"sort"
@@ -229,7 +228,7 @@ func (a adminAPIHandlers) UpdateGroupMembers(w http.ResponseWriter, r *http.Requ
 		return
 	}
 
-	data, err := ioutil.ReadAll(r.Body)
+	data, err := io.ReadAll(r.Body)
 	if err != nil {
 		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)
 		return
@@ -1464,7 +1463,7 @@ func (a adminAPIHandlers) AddCannedPolicy(w http.ResponseWriter, r *http.Request
 		return
 	}
 
-	iamPolicyBytes, err := ioutil.ReadAll(io.LimitReader(r.Body, r.ContentLength))
+	iamPolicyBytes, err := io.ReadAll(io.LimitReader(r.Body, r.ContentLength))
 	if err != nil {
 		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
 		return
@@ -1848,7 +1847,7 @@ func (a adminAPIHandlers) ImportIAM(w http.ResponseWriter, r *http.Request) {
 		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(s3Err), r.URL)
 		return
 	}
-	data, err := ioutil.ReadAll(r.Body)
+	data, err := io.ReadAll(r.Body)
 	if err != nil {
 		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)
 		return
@@ -1871,7 +1870,7 @@ func (a adminAPIHandlers) ImportIAM(w http.ResponseWriter, r *http.Request) {
 		default:
 			defer f.Close()
 			var allPolicies map[string]iampolicy.Policy
-			data, err = ioutil.ReadAll(f)
+			data, err = io.ReadAll(f)
 			if err != nil {
 				writeErrorResponseJSON(ctx, w, importErrorWithAPIErr(ctx, ErrInvalidRequest, err, allPoliciesFile, ""), r.URL)
 				return
@@ -1906,7 +1905,7 @@ func (a adminAPIHandlers) ImportIAM(w http.ResponseWriter, r *http.Request) {
 		default:
 			defer f.Close()
 			var userAccts map[string]madmin.AddOrUpdateUserReq
-			data, err := ioutil.ReadAll(f)
+			data, err := io.ReadAll(f)
 			if err != nil {
 				writeErrorResponseJSON(ctx, w, importErrorWithAPIErr(ctx, ErrInvalidRequest, err, allUsersFile, ""), r.URL)
 				return
@@ -1983,7 +1982,7 @@ func (a adminAPIHandlers) ImportIAM(w http.ResponseWriter, r *http.Request) {
 		default:
 			defer f.Close()
 			var grpInfos map[string]GroupInfo
-			data, err := ioutil.ReadAll(f)
+			data, err := io.ReadAll(f)
 			if err != nil {
 				writeErrorResponseJSON(ctx, w, importErrorWithAPIErr(ctx, ErrInvalidRequest, err, allGroupsFile, ""), r.URL)
 				return
@@ -2021,7 +2020,7 @@ func (a adminAPIHandlers) ImportIAM(w http.ResponseWriter, r *http.Request) {
 		default:
 			defer f.Close()
 			var serviceAcctReqs map[string]madmin.SRSvcAccCreate
-			data, err := ioutil.ReadAll(f)
+			data, err := io.ReadAll(f)
 			if err != nil {
 				writeErrorResponseJSON(ctx, w, importErrorWithAPIErr(ctx, ErrInvalidRequest, err, allSvcAcctsFile, ""), r.URL)
 				return
@@ -2117,7 +2116,7 @@ func (a adminAPIHandlers) ImportIAM(w http.ResponseWriter, r *http.Request) {
 		default:
 			defer f.Close()
 			var userPolicyMap map[string]MappedPolicy
-			data, err := ioutil.ReadAll(f)
+			data, err := io.ReadAll(f)
 			if err != nil {
 				writeErrorResponseJSON(ctx, w, importErrorWithAPIErr(ctx, ErrInvalidRequest, err, userPolicyMappingsFile, ""), r.URL)
 				return
@@ -2156,7 +2155,7 @@ func (a adminAPIHandlers) ImportIAM(w http.ResponseWriter, r *http.Request) {
 		default:
 			defer f.Close()
 			var grpPolicyMap map[string]MappedPolicy
-			data, err := ioutil.ReadAll(f)
+			data, err := io.ReadAll(f)
 			if err != nil {
 				writeErrorResponseJSON(ctx, w, importErrorWithAPIErr(ctx, ErrInvalidRequest, err, groupPolicyMappingsFile, ""), r.URL)
 				return
@@ -2185,7 +2184,7 @@ func (a adminAPIHandlers) ImportIAM(w http.ResponseWriter, r *http.Request) {
 		default:
 			defer f.Close()
 			var userPolicyMap map[string]MappedPolicy
-			data, err := ioutil.ReadAll(f)
+			data, err := io.ReadAll(f)
 			if err != nil {
 				writeErrorResponseJSON(ctx, w, importErrorWithAPIErr(ctx, ErrInvalidRequest, err, stsUserPolicyMappingsFile, ""), r.URL)
 				return
@@ -2224,7 +2223,7 @@ func (a adminAPIHandlers) ImportIAM(w http.ResponseWriter, r *http.Request) {
 		default:
 			defer f.Close()
 			var grpPolicyMap map[string]MappedPolicy
-			data, err := ioutil.ReadAll(f)
+			data, err := io.ReadAll(f)
 			if err != nil {
 				writeErrorResponseJSON(ctx, w, importErrorWithAPIErr(ctx, ErrInvalidRequest, err, stsGroupPolicyMappingsFile, ""), r.URL)
 				return

cmd/admin-handlers-users_test.go

@@ -24,7 +24,7 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"os"
@@ -388,7 +388,7 @@ func (s *TestSuiteIAM) TestUserPolicyEscalationBug(c *check) {
 	req.ContentLength = int64(len(buf))
 	sum := sha256.Sum256(buf)
 	req.Header.Set("X-Amz-Content-Sha256", hex.EncodeToString(sum[:]))
-	req.Body = ioutil.NopCloser(bytes.NewReader(buf))
+	req.Body = io.NopCloser(bytes.NewReader(buf))
 	req = signer.SignV4(*req, accessKey, secretKey, "", "")
 
 	// 3.1 Execute the request.

cmd/admin-handlers.go

@@ -27,7 +27,6 @@ import (
 	"fmt"
 	"hash/crc32"
 	"io"
-	"io/ioutil"
 	"math"
 	"math/rand"
 	"net/http"
@@ -758,7 +757,7 @@ func (a adminAPIHandlers) ProfileHandler(w http.ResponseWriter, r *http.Request)
 		}
 	}
 	// read request body
-	io.CopyN(ioutil.Discard, r.Body, 1)
+	io.CopyN(io.Discard, r.Body, 1)
 
 	globalProfilerMu.Lock()
 

cmd/admin-handlers_test.go

@@ -22,7 +22,6 @@ import (
 	"context"
 	"encoding/json"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -220,7 +219,7 @@ func testServicesCmdHandler(cmd cmdType, t *testing.T) {
 	adminTestBed.router.ServeHTTP(rec, req)
 
 	if rec.Code != http.StatusOK {
-		resp, _ := ioutil.ReadAll(rec.Body)
+		resp, _ := io.ReadAll(rec.Body)
 		t.Errorf("Expected to receive %d status code but received %d. Body (%s)",
 			http.StatusOK, rec.Code, string(resp))
 	}

cmd/auth-handler.go

@@ -25,7 +25,6 @@ import (
 	"encoding/hex"
 	"errors"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"strconv"
@@ -333,14 +332,14 @@ func checkRequestAuthTypeCredential(ctx context.Context, r *http.Request, action
 	var locationConstraint string
 	if action == policy.CreateBucketAction {
 		// To extract region from XML in request body, get copy of request body.
-		payload, err := ioutil.ReadAll(io.LimitReader(r.Body, maxLocationConstraintSize))
+		payload, err := io.ReadAll(io.LimitReader(r.Body, maxLocationConstraintSize))
 		if err != nil {
 			logger.LogIf(ctx, err, logger.Application)
 			return cred, owner, ErrMalformedXML
 		}
 
 		// Populate payload to extract location constraint.
-		r.Body = ioutil.NopCloser(bytes.NewReader(payload))
+		r.Body = io.NopCloser(bytes.NewReader(payload))
 
 		var s3Error APIErrorCode
 		locationConstraint, s3Error = parseLocationConstraint(r)
@@ -349,7 +348,7 @@ func checkRequestAuthTypeCredential(ctx context.Context, r *http.Request, action
 		}
 
 		// Populate payload again to handle it in HTTP handler.
-		r.Body = ioutil.NopCloser(bytes.NewReader(payload))
+		r.Body = io.NopCloser(bytes.NewReader(payload))
 	}
 	if cred.AccessKey != "" {
 		logger.GetReqInfo(ctx).AccessKey = cred.AccessKey

cmd/auth-handler_test.go

@@ -21,7 +21,6 @@ import (
 	"bytes"
 	"context"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
@@ -44,7 +43,7 @@ func TestGetRequestAuthType(t *testing.T) {
 		req   *http.Request
 		authT authType
 	}
-	nopCloser := ioutil.NopCloser(io.LimitReader(&nullReader{}, 1024))
+	nopCloser := io.NopCloser(io.LimitReader(&nullReader{}, 1024))
 	testCases := []testCase{
 		// Test case - 1
 		// Check for generic signature v4 header.
@@ -406,7 +405,7 @@ func TestIsReqAuthenticated(t *testing.T) {
 	for i, testCase := range testCases {
 		s3Error := isReqAuthenticated(ctx, testCase.req, globalSite.Region, serviceS3)
 		if s3Error != testCase.s3Error {
-			if _, err := ioutil.ReadAll(testCase.req.Body); toAPIErrorCode(ctx, err) != testCase.s3Error {
+			if _, err := io.ReadAll(testCase.req.Body); toAPIErrorCode(ctx, err) != testCase.s3Error {
 				t.Fatalf("Test %d: Unexpected S3 error: want %d - got %d (got after reading request %s)", i, testCase.s3Error, s3Error, toAPIError(ctx, err).Code)
 			}
 		}

cmd/bucket-handlers_test.go

@@ -21,7 +21,7 @@ import (
 	"bytes"
 	"encoding/xml"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"strconv"
@@ -885,7 +885,7 @@ func testAPIDeleteMultipleObjectsHandler(obj ObjectLayer, instanceType, bucketNa
 		}
 
 		// read the response body.
-		actualContent, err = ioutil.ReadAll(rec.Body)
+		actualContent, err = io.ReadAll(rec.Body)
 		if err != nil {
 			t.Fatalf("Test %d : MinIO %s: Failed parsing response body: <ERROR> %v", i+1, instanceType, err)
 		}

cmd/bucket-policy-handlers.go

@@ -21,7 +21,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"io"
-	"io/ioutil"
 	"net/http"
 
 	humanize "github.com/dustin/go-humanize"
@@ -79,7 +78,7 @@ func (api objectAPIHandlers) PutBucketPolicyHandler(w http.ResponseWriter, r *ht
 		return
 	}
 
-	bucketPolicyBytes, err := ioutil.ReadAll(io.LimitReader(r.Body, r.ContentLength))
+	bucketPolicyBytes, err := io.ReadAll(io.LimitReader(r.Body, r.ContentLength))
 	if err != nil {
 		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
 		return

cmd/bucket-policy-handlers_test.go

@@ -21,7 +21,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"reflect"
@@ -487,7 +486,7 @@ func testGetBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 			t.Fatalf("Case %d: Expected the response status to be `%d`, but instead found `%d`", i+1, testCase.expectedRespStatus, recV4.Code)
 		}
 		// read the response body.
-		bucketPolicyReadBuf, err := ioutil.ReadAll(recV4.Body)
+		bucketPolicyReadBuf, err := io.ReadAll(recV4.Body)
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed parsing response body: <ERROR> %v", i+1, instanceType, err)
 		}
@@ -525,7 +524,7 @@ func testGetBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 			t.Fatalf("Case %d: Expected the response status to be `%d`, but instead found `%d`", i+1, testCase.expectedRespStatus, recV2.Code)
 		}
 		// read the response body.
-		bucketPolicyReadBuf, err = ioutil.ReadAll(recV2.Body)
+		bucketPolicyReadBuf, err = io.ReadAll(recV2.Body)
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed parsing response body: <ERROR> %v", i+1, instanceType, err)
 		}

cmd/common-main.go

@@ -27,7 +27,6 @@ import (
 	"encoding/pem"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"math/rand"
 	"net"
 	"net/http"
@@ -564,7 +563,7 @@ func readFromSecret(sp string) (string, error) {
 	if isFile(pathJoin("/run/secrets/", sp)) {
 		sp = pathJoin("/run/secrets/", sp)
 	}
-	credBuf, err := ioutil.ReadFile(sp)
+	credBuf, err := os.ReadFile(sp)
 	if err != nil {
 		if os.IsNotExist(err) { // ignore if file doesn't exist.
 			return "", nil

cmd/common-main_test.go

@@ -19,7 +19,7 @@ package cmd
 
 import (
 	"errors"
-	"io/ioutil"
+	"os"
 	"reflect"
 	"testing"
 )
@@ -45,7 +45,7 @@ func Test_readFromSecret(t *testing.T) {
 	for _, testCase := range testCases {
 		testCase := testCase
 		t.Run("", func(t *testing.T) {
-			tmpfile, err := ioutil.TempFile("", "testfile")
+			tmpfile, err := os.CreateTemp("", "testfile")
 			if err != nil {
 				t.Error(err)
 			}
@@ -157,7 +157,7 @@ MINIO_ROOT_PASSWORD=minio123`,
 	for _, testCase := range testCases {
 		testCase := testCase
 		t.Run("", func(t *testing.T) {
-			tmpfile, err := ioutil.TempFile("", "testfile")
+			tmpfile, err := os.CreateTemp("", "testfile")
 			if err != nil {
 				t.Error(err)
 			}

cmd/config-common.go

@@ -21,7 +21,7 @@ import (
 	"bytes"
 	"context"
 	"errors"
-	"io/ioutil"
+	"io"
 	"net/http"
 
 	"github.com/minio/minio/internal/hash"
@@ -41,7 +41,7 @@ func readConfigWithMetadata(ctx context.Context, store objectIO, configFile stri
 	}
 	defer r.Close()
 
-	buf, err := ioutil.ReadAll(r)
+	buf, err := io.ReadAll(r)
 	if err != nil {
 		return nil, ObjectInfo{}, err
 	}

cmd/config-migrate_test.go

@@ -19,7 +19,6 @@ package cmd
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"testing"
 
@@ -47,7 +46,7 @@ func TestServerConfigMigrateV1(t *testing.T) {
 	// Create a V1 config json file and store it
 	configJSON := "{ \"version\":\"1\", \"accessKeyId\":\"abcde\", \"secretAccessKey\":\"abcdefgh\"}"
 	configPath := rootPath + "/fsUsers.json"
-	if err := ioutil.WriteFile(configPath, []byte(configJSON), 0o644); err != nil {
+	if err := os.WriteFile(configPath, []byte(configJSON), 0o644); err != nil {
 		t.Fatal("Unexpected error: ", err)
 	}
 
@@ -167,7 +166,7 @@ func TestServerConfigMigrateV2toV33(t *testing.T) {
 	configPath := rootPath + SlashSeparator + minioConfigFile
 
 	// Create a corrupted config file
-	if err := ioutil.WriteFile(configPath, []byte("{ \"version\":\"2\","), 0o644); err != nil {
+	if err := os.WriteFile(configPath, []byte("{ \"version\":\"2\","), 0o644); err != nil {
 		t.Fatal("Unexpected error: ", err)
 	}
 	// Fire a migrateConfig()
@@ -180,7 +179,7 @@ func TestServerConfigMigrateV2toV33(t *testing.T) {
 
 	// Create a V2 config json file and store it
 	configJSON := "{ \"version\":\"2\", \"credentials\": {\"accessKeyId\":\"" + accessKey + "\", \"secretAccessKey\":\"" + secretKey + "\", \"region\":\"us-east-1\"}, \"mongoLogger\":{\"addr\":\"127.0.0.1:3543\", \"db\":\"foodb\", \"collection\":\"foo\"}, \"syslogLogger\":{\"network\":\"127.0.0.1:543\", \"addr\":\"addr\"}, \"fileLogger\":{\"filename\":\"log.out\"}}"
-	if err := ioutil.WriteFile(configPath, []byte(configJSON), 0o644); err != nil {
+	if err := os.WriteFile(configPath, []byte(configJSON), 0o644); err != nil {
 		t.Fatal("Unexpected error: ", err)
 	}
 
@@ -226,7 +225,7 @@ func TestServerConfigMigrateFaultyConfig(t *testing.T) {
 	configPath := rootPath + SlashSeparator + minioConfigFile
 
 	// Create a corrupted config file
-	if err := ioutil.WriteFile(configPath, []byte("{ \"version\":\"2\", \"test\":"), 0o644); err != nil {
+	if err := os.WriteFile(configPath, []byte("{ \"version\":\"2\", \"test\":"), 0o644); err != nil {
 		t.Fatal("Unexpected error: ", err)
 	}
 
@@ -320,7 +319,7 @@ func TestServerConfigMigrateCorruptedConfig(t *testing.T) {
 
 	for i := 3; i <= 17; i++ {
 		// Create a corrupted config file
-		if err := ioutil.WriteFile(configPath, []byte(fmt.Sprintf("{ \"version\":\"%d\", \"credential\": { \"accessKey\": 1 } }", i)),
+		if err := os.WriteFile(configPath, []byte(fmt.Sprintf("{ \"version\":\"%d\", \"credential\": { \"accessKey\": 1 } }", i)),
 			0o644); err != nil {
 			t.Fatal("Unexpected error: ", err)
 		}
@@ -332,7 +331,7 @@ func TestServerConfigMigrateCorruptedConfig(t *testing.T) {
 	}
 
 	// Create a corrupted config file for version '2'.
-	if err := ioutil.WriteFile(configPath, []byte("{ \"version\":\"2\", \"credentials\": { \"accessKeyId\": 1 } }"), 0o644); err != nil {
+	if err := os.WriteFile(configPath, []byte("{ \"version\":\"2\", \"credentials\": { \"accessKeyId\": 1 } }"), 0o644); err != nil {
 		t.Fatal("Unexpected error: ", err)
 	}
 

cmd/data-update-tracker.go

@@ -24,7 +24,6 @@ import (
 	"encoding/binary"
 	"errors"
 	"io"
-	"io/ioutil"
 	"os"
 	"path"
 	"sort"
@@ -296,7 +295,7 @@ func (d *dataUpdateTracker) startSaver(ctx context.Context, interval time.Durati
 		}
 		for _, drive := range drives {
 			cacheFormatPath := pathJoin(drive, dataUpdateTrackerFilename)
-			err := ioutil.WriteFile(cacheFormatPath, buf.Bytes(), os.ModePerm)
+			err := os.WriteFile(cacheFormatPath, buf.Bytes(), os.ModePerm)
 			if err != nil {
 				if osIsNotExist(err) {
 					continue

cmd/data-usage_test.go

@@ -22,7 +22,6 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
@@ -502,7 +501,7 @@ func createUsageTestFiles(t *testing.T, base, bucket string, files []usageTestFi
 		if err != nil {
 			t.Fatal(err)
 		}
-		err = ioutil.WriteFile(filepath.Join(base, bucket, f.name), make([]byte, f.size), os.ModePerm)
+		err = os.WriteFile(filepath.Join(base, bucket, f.name), make([]byte, f.size), os.ModePerm)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -520,7 +519,7 @@ func generateUsageTestFiles(t *testing.T, base, bucket string, nFolders, nFiles,
 		}
 		for j := 0; j < nFiles; j++ {
 			name := filepath.Join(base, bucket, fmt.Sprint(i), fmt.Sprint(j)+".txt")
-			err = ioutil.WriteFile(name, pl, os.ModePerm)
+			err = os.WriteFile(name, pl, os.ModePerm)
 			if err != nil {
 				t.Fatal(err)
 			}

cmd/disk-cache-backend.go

@@ -27,7 +27,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path"
@@ -851,7 +850,7 @@ func (c *diskCache) Put(ctx context.Context, bucket, object string, data io.Read
 // Caches the object to disk
 func (c *diskCache) put(ctx context.Context, bucket, object string, data io.Reader, size int64, rs *HTTPRangeSpec, opts ObjectOptions, incHitsOnly, writeback bool) (oi ObjectInfo, err error) {
 	if !c.diskSpaceAvailable(size) {
-		io.Copy(ioutil.Discard, data)
+		io.Copy(io.Discard, data)
 		return oi, errDiskFull
 	}
 	cachePath := getCacheSHADir(c.dir, bucket, object)
@@ -1311,7 +1310,7 @@ func (c *diskCache) NewMultipartUpload(ctx context.Context, bucket, object, uID
 func (c *diskCache) PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, data io.Reader, size int64, opts ObjectOptions) (partInfo PartInfo, err error) {
 	oi := PartInfo{}
 	if !c.diskSpaceAvailable(size) {
-		io.Copy(ioutil.Discard, data)
+		io.Copy(io.Discard, data)
 		return oi, errDiskFull
 	}
 	cachePath := getMultipartCacheSHADir(c.dir, bucket, object)

cmd/disk-cache-check-support_contrib_windows.go

@@ -21,7 +21,6 @@ package cmd
 
 import (
 	"errors"
-	"io/ioutil"
 	"os"
 
 	"github.com/djherbis/atime"
@@ -30,7 +29,7 @@ import (
 
 // Return error if Atime is disabled on the O/S
 func checkAtimeSupport(dir string) (err error) {
-	file, err := ioutil.TempFile(dir, "prefix")
+	file, err := os.CreateTemp(dir, "prefix")
 	if err != nil {
 		return
 	}

cmd/disk-cache-check-support_other.go

@@ -23,7 +23,6 @@ package cmd
 import (
 	"errors"
 	"io"
-	"io/ioutil"
 	"os"
 	"time"
 
@@ -32,7 +31,7 @@ import (
 
 // Return error if Atime is disabled on the O/S
 func checkAtimeSupport(dir string) (err error) {
-	file, err := ioutil.TempFile(dir, "prefix")
+	file, err := os.CreateTemp(dir, "prefix")
 	if err != nil {
 		return
 	}
@@ -45,7 +44,7 @@ func checkAtimeSupport(dir string) (err error) {
 	// add a sleep to ensure atime change is detected
 	time.Sleep(10 * time.Millisecond)
 
-	if _, err = io.Copy(ioutil.Discard, file); err != nil {
+	if _, err = io.Copy(io.Discard, file); err != nil {
 		return
 	}
 

cmd/dummy-data-generator_test.go

@@ -22,7 +22,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"testing"
 )
 
@@ -46,7 +45,7 @@ type DummyDataGen struct {
 // Given the function:
 //
 //	f := func(r io.Reader) string {
-//	          b, _ := ioutil.ReadAll(r)
+//	          b, _ := io.ReadAll(r)
 //	          return string(b)
 //	}
 //
@@ -115,7 +114,7 @@ func (d *DummyDataGen) Seek(offset int64, whence int) (int64, error) {
 
 func TestDummyDataGenerator(t *testing.T) {
 	readAll := func(r io.Reader) string {
-		b, _ := ioutil.ReadAll(r)
+		b, _ := io.ReadAll(r)
 		return string(b)
 	}
 	checkEq := func(a, b string) {

cmd/erasure-object_test.go

@@ -25,7 +25,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -206,7 +205,7 @@ func TestDeleteObjectsVersioned(t *testing.T) {
 		}
 	}
 
-	if _, err = ioutil.ReadFile(pathJoin(fsDirs[0], bucketName, "dir/obj1", "xl.meta")); err == nil {
+	if _, err = os.ReadFile(pathJoin(fsDirs[0], bucketName, "dir/obj1", "xl.meta")); err == nil {
 		t.Fatalf("xl.meta still present after removal")
 	}
 }
@@ -543,7 +542,7 @@ func TestGetObjectNoQuorum(t *testing.T) {
 		}
 	}
 	if gr != nil {
-		_, err = io.Copy(ioutil.Discard, gr)
+		_, err = io.Copy(io.Discard, gr)
 		if err != toObjectErr(errErasureReadQuorum, bucket, object) {
 			t.Errorf("Expected GetObject to fail with %v, but failed with %v", toObjectErr(errErasureReadQuorum, bucket, object), err)
 		}
@@ -588,7 +587,7 @@ func TestGetObjectNoQuorum(t *testing.T) {
 			}
 		}
 		if gr != nil {
-			_, err = io.Copy(ioutil.Discard, gr)
+			_, err = io.Copy(io.Discard, gr)
 			if err != toObjectErr(errErasureReadQuorum, bucket, object) {
 				t.Errorf("Expected GetObject to fail with %v, but failed with %v", toObjectErr(errErasureReadQuorum, bucket, object), err)
 			}

cmd/format-disk-cache.go

@@ -22,7 +22,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
@@ -421,7 +420,7 @@ func migrateOldCache(ctx context.Context, c *diskCache) error {
 			// get old cached metadata
 			oldMetaPath := pathJoin(oldCacheBucketsPath, bucket, object, cacheMetaJSONFile)
 			metaPath := pathJoin(destdir, cacheMetaJSONFile)
-			metaBytes, err := ioutil.ReadFile(oldMetaPath)
+			metaBytes, err := os.ReadFile(oldMetaPath)
 			if err != nil {
 				return err
 			}
@@ -459,7 +458,7 @@ func migrateOldCache(ctx context.Context, c *diskCache) error {
 				return err
 			}
 
-			if err = ioutil.WriteFile(metaPath, jsonData, 0o644); err != nil {
+			if err = os.WriteFile(metaPath, jsonData, 0o644); err != nil {
 				return err
 			}
 		}

cmd/format-erasure.go

@@ -23,11 +23,11 @@ import (
 	"errors"
 	"fmt"
 	"io/fs"
-	"io/ioutil"
+	"os"
 	"reflect"
 	"sync"
 
-	humanize "github.com/dustin/go-humanize"
+	"github.com/dustin/go-humanize"
 	"github.com/minio/minio/internal/color"
 	"github.com/minio/minio/internal/config"
 	"github.com/minio/minio/internal/config/storageclass"
@@ -203,7 +203,7 @@ func formatErasureMigrate(export string) ([]byte, fs.FileInfo, error) {
 	}
 
 	migrate := func(formatPath string, formatData []byte) ([]byte, fs.FileInfo, error) {
-		if err = ioutil.WriteFile(formatPath, formatData, 0o666); err != nil {
+		if err = os.WriteFile(formatPath, formatData, 0o666); err != nil {
 			return nil, nil, err
 		}
 		formatFi, err := Lstat(formatPath)

cmd/format-erasure_test.go

@@ -22,7 +22,6 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"errors"
-	"io/ioutil"
 	"os"
 	"reflect"
 	"testing"
@@ -122,7 +121,7 @@ func TestFormatErasureMigrate(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if err = ioutil.WriteFile(pathJoin(rootPath, minioMetaBucket, formatConfigFile), b, os.FileMode(0o644)); err != nil {
+	if err = os.WriteFile(pathJoin(rootPath, minioMetaBucket, formatConfigFile), b, os.FileMode(0o644)); err != nil {
 		t.Fatal(err)
 	}
 
@@ -140,7 +139,7 @@ func TestFormatErasureMigrate(t *testing.T) {
 		t.Fatalf("expected version: %s, got: %s", formatErasureVersionV3, migratedVersion)
 	}
 
-	b, err = ioutil.ReadFile(pathJoin(rootPath, minioMetaBucket, formatConfigFile))
+	b, err = os.ReadFile(pathJoin(rootPath, minioMetaBucket, formatConfigFile))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -170,7 +169,7 @@ func TestFormatErasureMigrate(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if err = ioutil.WriteFile(pathJoin(rootPath, minioMetaBucket, formatConfigFile), b, os.FileMode(0o644)); err != nil {
+	if err = os.WriteFile(pathJoin(rootPath, minioMetaBucket, formatConfigFile), b, os.FileMode(0o644)); err != nil {
 		t.Fatal(err)
 	}
 
@@ -190,7 +189,7 @@ func TestFormatErasureMigrate(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if err = ioutil.WriteFile(pathJoin(rootPath, minioMetaBucket, formatConfigFile), b, os.FileMode(0o644)); err != nil {
+	if err = os.WriteFile(pathJoin(rootPath, minioMetaBucket, formatConfigFile), b, os.FileMode(0o644)); err != nil {
 		t.Fatal(err)
 	}
 

cmd/fs-v1-helpers_test.go

@@ -20,7 +20,6 @@ package cmd
 import (
 	"bytes"
 	"io"
-	"io/ioutil"
 	"os"
 	"path"
 	"testing"
@@ -267,7 +266,7 @@ func TestFSDeletes(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	err = ioutil.WriteFile(pathJoin(path, "success-vol", "not-empty", "file"), []byte("data"), 0o777)
+	err = os.WriteFile(pathJoin(path, "success-vol", "not-empty", "file"), []byte("data"), 0o777)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -363,7 +362,7 @@ func BenchmarkFSDeleteFile(b *testing.B) {
 	// We need to create and delete the file sequentially inside the benchmark.
 	for i := 0; i < b.N; i++ {
 		b.StopTimer()
-		err = ioutil.WriteFile(filename, []byte("data"), 0o777)
+		err = os.WriteFile(filename, []byte("data"), 0o777)
 		if err != nil {
 			b.Fatal(err)
 		}
@@ -540,7 +539,7 @@ func TestFSRemoveMeta(t *testing.T) {
 func TestFSIsFile(t *testing.T) {
 	filePath := pathJoin(t.TempDir(), "tmpfile")
 
-	if err := ioutil.WriteFile(filePath, nil, 0o777); err != nil {
+	if err := os.WriteFile(filePath, nil, 0o777); err != nil {
 		t.Fatalf("Unable to create file %s", filePath)
 	}
 

cmd/fs-v1-metadata.go

@@ -22,7 +22,6 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"io"
-	"io/ioutil"
 	"os"
 	pathutil "path"
 
@@ -216,7 +215,7 @@ func (m *fsMetaV1) ReadFrom(ctx context.Context, lk *lock.LockedFile) (n int64,
 		return 0, err
 	}
 
-	fsMetaBuf, err = ioutil.ReadAll(io.NewSectionReader(lk, 0, fi.Size()))
+	fsMetaBuf, err = io.ReadAll(io.NewSectionReader(lk, 0, fi.Size()))
 	if err != nil {
 		logger.LogIf(ctx, err)
 		return 0, err

cmd/fs-v1-multipart.go

@@ -22,7 +22,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"path/filepath"
 	"sort"
@@ -246,7 +246,7 @@ func (fs *FSObjects) NewMultipartUpload(ctx context.Context, bucket, object stri
 		return nil, err
 	}
 
-	if err = ioutil.WriteFile(pathJoin(uploadIDDir, fs.metaJSONFile), fsMetaBytes, 0o666); err != nil {
+	if err = os.WriteFile(pathJoin(uploadIDDir, fs.metaJSONFile), fsMetaBytes, 0o666); err != nil {
 		logger.LogIf(ctx, err)
 		return nil, err
 	}
@@ -525,7 +525,7 @@ func (fs *FSObjects) ListObjectParts(ctx context.Context, bucket, object, upload
 	}
 	defer rc.Close()
 
-	fsMetaBytes, err := ioutil.ReadAll(rc)
+	fsMetaBytes, err := io.ReadAll(rc)
 	if err != nil {
 		return result, toObjectErr(err, bucket, object)
 	}

cmd/fs-v1.go

@@ -22,7 +22,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"os/user"
@@ -868,7 +867,7 @@ func (fs *FSObjects) getObjectInfoNoFSLock(ctx context.Context, bucket, object s
 
 	rc, _, err := fsOpenFile(ctx, fsMetaPath, 0)
 	if err == nil {
-		fsMetaBuf, rerr := ioutil.ReadAll(rc)
+		fsMetaBuf, rerr := io.ReadAll(rc)
 		rc.Close()
 		if rerr == nil {
 			json := jsoniter.ConfigCompatibleWithStandardLibrary

cmd/gateway-main.go

@@ -21,7 +21,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/url"
 	"os"
@@ -279,7 +279,7 @@ func StartGateway(ctx *cli.Context, gw Gateway) {
 		UseTLSConfig(newTLSConfig(getCert)).
 		UseShutdownTimeout(ctx.Duration("shutdown-timeout")).
 		UseBaseContext(GlobalContext).
-		UseCustomLogger(log.New(ioutil.Discard, "", 0)) // Turn-off random logging by Go stdlib
+		UseCustomLogger(log.New(io.Discard, "", 0)) // Turn-off random logging by Go stdlib
 
 	go func() {
 		globalHTTPServerErrorCh <- httpServer.Start(GlobalContext)

cmd/handler-api.go

@@ -18,8 +18,8 @@
 package cmd
 
 import (
-	"io/ioutil"
 	"net/http"
+	"os"
 	"runtime"
 	"strconv"
 	"sync"
@@ -56,7 +56,7 @@ type apiConfig struct {
 const cgroupLimitFile = "/sys/fs/cgroup/memory/memory.limit_in_bytes"
 
 func cgroupLimit(limitFile string) (limit uint64) {
-	buf, err := ioutil.ReadFile(limitFile)
+	buf, err := os.ReadFile(limitFile)
 	if err != nil {
 		return 9223372036854771712
 	}

cmd/handler-utils.go

@@ -23,7 +23,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"mime/multipart"
 	"net/http"
 	"net/textproto"
@@ -305,7 +304,7 @@ func extractPostPolicyFormValues(ctx context.Context, form *multipart.Form) (fil
 			b.WriteString(v)
 		}
 		fileSize = int64(b.Len())
-		filePart = ioutil.NopCloser(b)
+		filePart = io.NopCloser(b)
 		return filePart, fileName, fileSize, formValues, nil
 	}
 

cmd/handler-utils_test.go

@@ -21,7 +21,7 @@ import (
 	"bytes"
 	"context"
 	"encoding/xml"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/textproto"
 	"os"
@@ -45,13 +45,13 @@ func TestIsValidLocationContraint(t *testing.T) {
 
 	// Corrupted XML
 	malformedReq := &http.Request{
-		Body:          ioutil.NopCloser(bytes.NewReader([]byte("<>"))),
+		Body:          io.NopCloser(bytes.NewReader([]byte("<>"))),
 		ContentLength: int64(len("<>")),
 	}
 
 	// Not an XML
 	badRequest := &http.Request{
-		Body:          ioutil.NopCloser(bytes.NewReader([]byte("garbage"))),
+		Body:          io.NopCloser(bytes.NewReader([]byte("garbage"))),
 		ContentLength: int64(len("garbage")),
 	}
 
@@ -61,7 +61,7 @@ func TestIsValidLocationContraint(t *testing.T) {
 		createBucketConfig.Location = location
 		createBucketConfigBytes, _ := xml.Marshal(createBucketConfig)
 		createBucketConfigBuffer := bytes.NewReader(createBucketConfigBytes)
-		req.Body = ioutil.NopCloser(createBucketConfigBuffer)
+		req.Body = io.NopCloser(createBucketConfigBuffer)
 		req.ContentLength = int64(createBucketConfigBuffer.Len())
 		return req
 	}

cmd/lock-rest-server_test.go

@@ -20,7 +20,7 @@ package cmd
 import (
 	"bufio"
 	"bytes"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"sort"
@@ -49,7 +49,7 @@ func BenchmarkLockArgs(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		req.Body = ioutil.NopCloser(bytes.NewReader(argBytes))
+		req.Body = io.NopCloser(bytes.NewReader(argBytes))
 		getLockArgs(req)
 	}
 }
@@ -68,7 +68,7 @@ func BenchmarkLockArgsOld(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		req.Body = ioutil.NopCloser(bytes.NewReader([]byte(`obj.txt`)))
+		req.Body = io.NopCloser(bytes.NewReader([]byte(`obj.txt`)))
 		getLockArgsOld(req)
 	}
 }

cmd/object-api-putobject_test.go

@@ -23,7 +23,6 @@ import (
 	"crypto/md5"
 	"encoding/hex"
 	"errors"
-	"io/ioutil"
 	"os"
 	"path"
 	"testing"
@@ -352,7 +351,7 @@ func testObjectAPIPutObjectStaleFiles(obj ObjectLayer, instanceType string, disk
 
 	for _, disk := range disks {
 		tmpMetaDir := path.Join(disk, minioMetaTmpBucket)
-		files, err := ioutil.ReadDir(tmpMetaDir)
+		files, err := os.ReadDir(tmpMetaDir)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -431,9 +430,9 @@ func testObjectAPIMultipartPutObjectStaleFiles(obj ObjectLayer, instanceType str
 
 	for _, disk := range disks {
 		tmpMetaDir := path.Join(disk, minioMetaTmpBucket)
-		files, err := ioutil.ReadDir(tmpMetaDir)
+		files, err := os.ReadDir(tmpMetaDir)
 		if err != nil {
-			// Its OK to have non-existen tmpMetaDir.
+			// It's OK to have non-existing tmpMetaDir.
 			if osIsNotExist(err) {
 				continue
 			}

cmd/object-handlers_test.go

@@ -29,7 +29,6 @@ import (
 	"hash"
 	"hash/crc32"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -540,7 +539,7 @@ func testAPIGetObjectHandler(obj ObjectLayer, instanceType, bucketName string, a
 			t.Fatalf("Case %d: Expected the response status to be `%d`, but instead found `%d`", i+1, testCase.expectedRespStatus, rec.Code)
 		}
 		// read the response body.
-		actualContent, err := ioutil.ReadAll(rec.Body)
+		actualContent, err := io.ReadAll(rec.Body)
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed reading response body: <ERROR> %v", i+1, instanceType, err)
 		}
@@ -584,7 +583,7 @@ func testAPIGetObjectHandler(obj ObjectLayer, instanceType, bucketName string, a
 		}
 
 		// read the response body.
-		actualContent, err = ioutil.ReadAll(recV2.Body)
+		actualContent, err = io.ReadAll(recV2.Body)
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed to read response body: <ERROR> %v", i+1, instanceType, err)
 		}
@@ -739,7 +738,7 @@ func testAPIGetObjectWithMPHandler(obj ObjectLayer, instanceType, bucketName str
 		// Check response code (we make only valid requests in
 		// this test)
 		if rec.Code != http.StatusPartialContent && rec.Code != http.StatusOK {
-			bd, err1 := ioutil.ReadAll(rec.Body)
+			bd, err1 := io.ReadAll(rec.Body)
 			t.Fatalf("%s Object: %s Case %d ByteRange: %s: Got response status `%d` and body: %s,%v",
 				instanceType, object, i+1, byteRange, rec.Code, string(bd), err1)
 		}
@@ -922,7 +921,7 @@ func testAPIGetObjectWithPartNumberHandler(obj ObjectLayer, instanceType, bucket
 
 		// Check response code (we make only valid requests in this test)
 		if rec.Code != http.StatusPartialContent && rec.Code != http.StatusOK {
-			bd, err1 := ioutil.ReadAll(rec.Body)
+			bd, err1 := io.ReadAll(rec.Body)
 			t.Fatalf("%s Object: %s ObjectIndex %d PartNumber: %d: Got response status `%d` and body: %s,%v",
 				instanceType, object, oindex, partNumber, rec.Code, string(bd), err1)
 		}
@@ -1245,7 +1244,7 @@ func testAPIPutObjectStreamSigV4Handler(obj ObjectLayer, instanceType, bucketNam
 				i+1, instanceType, testCase.expectedRespStatus, rec.Code, testCase.fault)
 		}
 		// read the response body.
-		actualContent, err := ioutil.ReadAll(rec.Body)
+		actualContent, err := io.ReadAll(rec.Body)
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed parsing response body: <ERROR> %v", i+1, instanceType, err)
 		}
@@ -3078,7 +3077,7 @@ func testAPICompleteMultipartHandler(obj ObjectLayer, instanceType, bucketName s
 		}
 
 		// read the response body.
-		actualContent, err = ioutil.ReadAll(rec.Body)
+		actualContent, err = io.ReadAll(rec.Body)
 		if err != nil {
 			t.Fatalf("Test %d : MinIO %s: Failed parsing response body: <ERROR> %v", i+1, instanceType, err)
 		}
@@ -3490,7 +3489,7 @@ func testAPIPutObjectPartHandlerStreaming(obj ObjectLayer, instanceType, bucketN
 
 	// Get uploadID of the mulitpart upload initiated.
 	var mpartResp InitiateMultipartUploadResponse
-	mpartRespBytes, err := ioutil.ReadAll(rec.Result().Body)
+	mpartRespBytes, err := io.ReadAll(rec.Result().Body)
 	if err != nil {
 		t.Fatalf("[%s] Failed to read NewMultipartUpload response <ERROR> %v", instanceType, err)
 	}
@@ -3531,7 +3530,7 @@ func testAPIPutObjectPartHandlerStreaming(obj ObjectLayer, instanceType, bucketN
 		apiRouter.ServeHTTP(rec, req)
 
 		if test.expectedErr != noAPIErr {
-			errBytes, err := ioutil.ReadAll(rec.Result().Body)
+			errBytes, err := io.ReadAll(rec.Result().Body)
 			if err != nil {
 				t.Fatalf("Test %d %s Failed to read error response from upload part request %s/%s: <ERROR> %v",
 					i+1, instanceType, bucketName, testObject, err)
@@ -3796,7 +3795,7 @@ func testAPIPutObjectPartHandler(obj ObjectLayer, instanceType, bucketName strin
 				if rec.Code != http.StatusOK {
 					var errBytes []byte
 					// read the response body.
-					errBytes, err = ioutil.ReadAll(rec.Result().Body)
+					errBytes, err = io.ReadAll(rec.Result().Body)
 					if err != nil {
 						t.Fatalf("%s, Failed to read error response from upload part request \"%s\"/\"%s\": <ERROR> %v.",
 							reqType, bucketName, test.objectName, err)
@@ -3878,7 +3877,7 @@ func testAPIListObjectPartsHandlerPreSign(obj ObjectLayer, instanceType, bucketN
 
 	// Get uploadID of the mulitpart upload initiated.
 	var mpartResp InitiateMultipartUploadResponse
-	mpartRespBytes, err := ioutil.ReadAll(rec.Result().Body)
+	mpartRespBytes, err := io.ReadAll(rec.Result().Body)
 	if err != nil {
 		t.Fatalf("[%s] Failed to read NewMultipartUpload response <ERROR> %v", instanceType, err)
 	}
@@ -4103,7 +4102,7 @@ func testAPIListObjectPartsHandler(obj ObjectLayer, instanceType, bucketName str
 
 					var errBytes []byte
 					// read the response body.
-					errBytes, err = ioutil.ReadAll(rec.Result().Body)
+					errBytes, err = io.ReadAll(rec.Result().Body)
 					if err != nil {
 						t.Fatalf("%s,Failed to read error response list object parts request %s/%s: <ERROR> %v", reqType, bucketName, testObject, err)
 					}

cmd/os-readdir_test.go

@@ -19,7 +19,6 @@ package cmd
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
@@ -36,7 +35,7 @@ func TestReadDirFail(t *testing.T) {
 	}
 
 	file := path.Join(os.TempDir(), "issue")
-	if err := ioutil.WriteFile(file, []byte(""), 0o644); err != nil {
+	if err := os.WriteFile(file, []byte(""), 0o644); err != nil {
 		t.Fatal(err)
 	}
 	defer os.RemoveAll(file)
@@ -80,7 +79,7 @@ func setupTestReadDirFiles(t *testing.T) (testResults []result) {
 	entries := []string{}
 	for i := 0; i < 10; i++ {
 		name := fmt.Sprintf("file-%d", i)
-		if err := ioutil.WriteFile(filepath.Join(dir, name), []byte{}, os.ModePerm); err != nil {
+		if err := os.WriteFile(filepath.Join(dir, name), []byte{}, os.ModePerm); err != nil {
 			// For cleanup, its required to add these entries into test results.
 			testResults = append(testResults, result{dir, entries})
 			t.Fatalf("Unable to create file, %s", err)
@@ -105,7 +104,7 @@ func setupTestReadDirGeneric(t *testing.T) (testResults []result) {
 	entries := []string{"mydir/"}
 	for i := 0; i < 10; i++ {
 		name := fmt.Sprintf("file-%d", i)
-		if err := ioutil.WriteFile(filepath.Join(dir, "mydir", name), []byte{}, os.ModePerm); err != nil {
+		if err := os.WriteFile(filepath.Join(dir, "mydir", name), []byte{}, os.ModePerm); err != nil {
 			// For cleanup, its required to add these entries into test results.
 			testResults = append(testResults, result{dir, entries})
 			t.Fatalf("Unable to write file, %s", err)
@@ -130,7 +129,7 @@ func setupTestReadDirSymlink(t *testing.T) (testResults []result) {
 	for i := 0; i < 10; i++ {
 		name1 := fmt.Sprintf("file-%d", i)
 		name2 := fmt.Sprintf("file-%d", i+10)
-		if err := ioutil.WriteFile(filepath.Join(dir, name1), []byte{}, os.ModePerm); err != nil {
+		if err := os.WriteFile(filepath.Join(dir, name1), []byte{}, os.ModePerm); err != nil {
 			// For cleanup, its required to add these entries into test results.
 			testResults = append(testResults, result{dir, entries})
 			t.Fatalf("Unable to create a file, %s", err)
@@ -235,7 +234,7 @@ func TestReadDirN(t *testing.T) {
 		dir := t.TempDir()
 
 		for c := 1; c <= testCase.numFiles; c++ {
-			err := ioutil.WriteFile(filepath.Join(dir, fmt.Sprintf("%d", c)), []byte{}, os.ModePerm)
+			err := os.WriteFile(filepath.Join(dir, fmt.Sprintf("%d", c)), []byte{}, os.ModePerm)
 			if err != nil {
 				os.RemoveAll(dir)
 				t.Fatalf("Unable to create a file, %s", err)

cmd/perf-tests.go

@@ -22,7 +22,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"net/http"
 	"sync"
@@ -185,7 +184,7 @@ func selfSpeedTest(ctx context.Context, opts speedTestOpts) (SpeedTestResult, er
 				fbr := firstByteRecorder{
 					r: r,
 				}
-				n, err := io.Copy(ioutil.Discard, &fbr)
+				n, err := io.Copy(io.Discard, &fbr)
 				r.Close()
 				if err == nil {
 					response := time.Since(t)

cmd/post-policy_test.go

@@ -22,7 +22,7 @@ import (
 	"context"
 	"encoding/base64"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"mime/multipart"
 	"net/http"
 	"net/http/httptest"
@@ -222,7 +222,7 @@ func testPostPolicyBucketHandler(obj ObjectLayer, instanceType string, t TestErr
 		}
 		if testCase.malformedBody {
 			// Change the request body.
-			req.Body = ioutil.NopCloser(bytes.NewReader([]byte("Hello,")))
+			req.Body = io.NopCloser(bytes.NewReader([]byte("Hello,")))
 		}
 		// Since `apiRouter` satisfies `http.Handler` it has a ServeHTTP to execute the logic ofthe handler.
 		// Call the ServeHTTP to execute the handler.

cmd/s3-zip-handlers.go

@@ -24,7 +24,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"sort"
 	"strings"
@@ -184,7 +183,7 @@ func (api objectAPIHandlers) getObjectInArchiveFileHandler(ctx context.Context,
 			return
 		}
 	} else {
-		rc = ioutil.NopCloser(bytes.NewReader([]byte{}))
+		rc = io.NopCloser(bytes.NewReader([]byte{}))
 	}
 
 	defer rc.Close()
@@ -317,7 +316,7 @@ func getFilesListFromZIPObject(ctx context.Context, objectAPI ObjectLayer, bucke
 		if err != nil {
 			return nil, ObjectInfo{}, err
 		}
-		b, err := ioutil.ReadAll(gr)
+		b, err := io.ReadAll(gr)
 		gr.Close()
 		if err != nil {
 			return nil, ObjectInfo{}, err

cmd/server-main.go

@@ -23,7 +23,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"math/rand"
 	"os"
@@ -35,7 +34,7 @@ import (
 	"time"
 
 	"github.com/minio/cli"
-	minio "github.com/minio/minio-go/v7"
+	"github.com/minio/minio-go/v7"
 	"github.com/minio/minio-go/v7/pkg/credentials"
 	"github.com/minio/minio/internal/auth"
 	"github.com/minio/minio/internal/bucket/bandwidth"
@@ -516,7 +515,7 @@ func serverMain(ctx *cli.Context) {
 		UseIdleTimeout(ctx.Duration("idle-timeout")).
 		UseReadHeaderTimeout(ctx.Duration("read-header-timeout")).
 		UseBaseContext(GlobalContext).
-		UseCustomLogger(log.New(ioutil.Discard, "", 0)) // Turn-off random logging by Go stdlib
+		UseCustomLogger(log.New(io.Discard, "", 0)) // Turn-off random logging by Go stdlib
 
 	go func() {
 		globalHTTPServerErrorCh <- httpServer.Start(GlobalContext)

cmd/server_test.go

@@ -23,7 +23,6 @@ import (
 	"encoding/xml"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"net/http"
 	"net/url"
@@ -34,7 +33,7 @@ import (
 	"testing"
 	"time"
 
-	humanize "github.com/dustin/go-humanize"
+	"github.com/dustin/go-humanize"
 	"github.com/minio/minio-go/v7/pkg/set"
 	xhttp "github.com/minio/minio/internal/http"
 	"github.com/minio/pkg/bucket/policy"
@@ -65,7 +64,7 @@ func (c *check) Assert(gotValue interface{}, expectedValue interface{}) {
 }
 
 func verifyError(c *check, response *http.Response, code, description string, statusCode int) {
-	data, err := ioutil.ReadAll(response.Body)
+	data, err := io.ReadAll(response.Body)
 	c.Assert(err, nil)
 	errorResponse := APIErrorResponse{}
 	err = xml.Unmarshal(data, &errorResponse)
@@ -384,7 +383,7 @@ func (s *TestSuiteCommon) TestBucketPolicy(c *check) {
 	c.Assert(err, nil)
 	c.Assert(response.StatusCode, http.StatusOK)
 
-	bucketPolicyReadBuf, err := ioutil.ReadAll(response.Body)
+	bucketPolicyReadBuf, err := io.ReadAll(response.Body)
 	c.Assert(err, nil)
 	// Verify if downloaded policy matches with previously uploaded.
 	expectedPolicy, err := policy.ParseConfig(strings.NewReader(bucketPolicyStr), bucketName)
@@ -593,7 +592,7 @@ func (s *TestSuiteCommon) TestDeleteMultipleObjects(c *check) {
 	c.Assert(response.StatusCode, http.StatusOK)
 
 	deleteResp := DeleteObjectsResponse{}
-	delRespBytes, err := ioutil.ReadAll(response.Body)
+	delRespBytes, err := io.ReadAll(response.Body)
 	c.Assert(err, nil)
 	err = xml.Unmarshal(delRespBytes, &deleteResp)
 	c.Assert(err, nil)
@@ -616,7 +615,7 @@ func (s *TestSuiteCommon) TestDeleteMultipleObjects(c *check) {
 	c.Assert(response.StatusCode, http.StatusOK)
 
 	deleteResp = DeleteObjectsResponse{}
-	delRespBytes, err = ioutil.ReadAll(response.Body)
+	delRespBytes, err = io.ReadAll(response.Body)
 	c.Assert(err, nil)
 	err = xml.Unmarshal(delRespBytes, &deleteResp)
 	c.Assert(err, nil)
@@ -756,7 +755,7 @@ func (s *TestSuiteCommon) TestEmptyObject(c *check) {
 
 	var buffer bytes.Buffer
 	// extract the body of the response.
-	responseBody, err := ioutil.ReadAll(response.Body)
+	responseBody, err := io.ReadAll(response.Body)
 	c.Assert(err, nil)
 	// assert the http response body content.
 	c.Assert(true, bytes.Equal(responseBody, buffer.Bytes()))
@@ -877,7 +876,7 @@ func (s *TestSuiteCommon) TestMultipleObjects(c *check) {
 	c.Assert(response.StatusCode, http.StatusOK)
 
 	// extract the response body.
-	responseBody, err := ioutil.ReadAll(response.Body)
+	responseBody, err := io.ReadAll(response.Body)
 	c.Assert(err, nil)
 	// assert the content body for the expected object data.
 	c.Assert(true, bytes.Equal(responseBody, []byte("hello one")))
@@ -906,7 +905,7 @@ func (s *TestSuiteCommon) TestMultipleObjects(c *check) {
 	c.Assert(response.StatusCode, http.StatusOK)
 
 	// verify response data
-	responseBody, err = ioutil.ReadAll(response.Body)
+	responseBody, err = io.ReadAll(response.Body)
 	c.Assert(err, nil)
 	c.Assert(true, bytes.Equal(responseBody, []byte("hello two")))
 
@@ -933,7 +932,7 @@ func (s *TestSuiteCommon) TestMultipleObjects(c *check) {
 	c.Assert(response.StatusCode, http.StatusOK)
 
 	// verify object.
-	responseBody, err = ioutil.ReadAll(response.Body)
+	responseBody, err = io.ReadAll(response.Body)
 	c.Assert(err, nil)
 	c.Assert(true, bytes.Equal(responseBody, []byte("hello three")))
 }
@@ -1059,7 +1058,7 @@ func (s *TestSuiteCommon) TestCopyObject(c *check) {
 	c.Assert(response.StatusCode, http.StatusOK)
 	// reading the response body.
 	// response body is expected to have the copied content of the first uploaded object.
-	object, err := ioutil.ReadAll(response.Body)
+	object, err := io.ReadAll(response.Body)
 	c.Assert(err, nil)
 	c.Assert(string(object), "hello world")
 }
@@ -1233,7 +1232,7 @@ func (s *TestSuiteCommon) TestSHA256Mismatch(c *check) {
 	// Set the body to generate signature mismatch.
 	helloReader := bytes.NewReader([]byte("Hello, World"))
 	request.ContentLength = helloReader.Size()
-	request.Body = ioutil.NopCloser(helloReader)
+	request.Body = io.NopCloser(helloReader)
 	c.Assert(err, nil)
 
 	// execute the HTTP request.
@@ -1562,7 +1561,7 @@ func (s *TestSuiteCommon) TestPartialContent(c *check) {
 	response, err = s.client.Do(request)
 	c.Assert(err, nil)
 	c.Assert(response.StatusCode, http.StatusPartialContent)
-	partialObject, err := ioutil.ReadAll(response.Body)
+	partialObject, err := io.ReadAll(response.Body)
 	c.Assert(err, nil)
 
 	c.Assert(string(partialObject), "Wo")
@@ -1628,7 +1627,7 @@ func (s *TestSuiteCommon) TestListObjectsHandler(c *check) {
 		c.Assert(err, nil)
 		c.Assert(response.StatusCode, http.StatusOK)
 
-		getContent, err := ioutil.ReadAll(response.Body)
+		getContent, err := io.ReadAll(response.Body)
 		c.Assert(err, nil)
 
 		for _, expectedStr := range testCase.expectedStrings {
@@ -1703,7 +1702,7 @@ func (s *TestSuiteCommon) TestListObjectsSpecialCharactersHandler(c *check) {
 		c.Assert(err, nil)
 		c.Assert(response.StatusCode, http.StatusOK)
 
-		getContent, err := ioutil.ReadAll(response.Body)
+		getContent, err := io.ReadAll(response.Body)
 		c.Assert(err, nil)
 
 		for _, expectedStr := range testCase.expectedStrings {
@@ -1837,7 +1836,7 @@ func (s *TestSuiteCommon) TestGetObjectLarge10MiB(c *check) {
 	c.Assert(err, nil)
 	c.Assert(response.StatusCode, http.StatusOK)
 	// extract the content from response body.
-	getContent, err := ioutil.ReadAll(response.Body)
+	getContent, err := io.ReadAll(response.Body)
 	c.Assert(err, nil)
 
 	// Compare putContent and getContent.
@@ -1898,7 +1897,7 @@ func (s *TestSuiteCommon) TestGetObjectLarge11MiB(c *check) {
 	c.Assert(err, nil)
 	c.Assert(response.StatusCode, http.StatusOK)
 	// fetch the content from response body.
-	getContent, err := ioutil.ReadAll(response.Body)
+	getContent, err := io.ReadAll(response.Body)
 	c.Assert(err, nil)
 
 	// Get etag of the response content.
@@ -1986,7 +1985,7 @@ func (s *TestSuiteCommon) TestGetPartialObjectMisAligned(c *check) {
 		// Since only part of the object is requested, expecting response status to be http.StatusPartialContent .
 		c.Assert(response.StatusCode, http.StatusPartialContent)
 		// parse the HTTP response body.
-		getContent, err := ioutil.ReadAll(response.Body)
+		getContent, err := io.ReadAll(response.Body)
 		c.Assert(err, nil)
 
 		// Compare putContent and getContent.
@@ -2052,7 +2051,7 @@ func (s *TestSuiteCommon) TestGetPartialObjectLarge11MiB(c *check) {
 	// Since only part of the object is requested, expecting response status to be http.StatusPartialContent .
 	c.Assert(response.StatusCode, http.StatusPartialContent)
 	// read the downloaded content from the response body.
-	getContent, err := ioutil.ReadAll(response.Body)
+	getContent, err := io.ReadAll(response.Body)
 	c.Assert(err, nil)
 
 	// Compare putContent and getContent.
@@ -2119,7 +2118,7 @@ func (s *TestSuiteCommon) TestGetPartialObjectLarge10MiB(c *check) {
 	// Since only part of the object is requested, expecting response status to be http.StatusPartialContent .
 	c.Assert(response.StatusCode, http.StatusPartialContent)
 	// read the downloaded content from the response body.
-	getContent, err := ioutil.ReadAll(response.Body)
+	getContent, err := io.ReadAll(response.Body)
 	c.Assert(err, nil)
 
 	// Compare putContent and getContent.

cmd/signature-v4-utils.go

@@ -22,7 +22,6 @@ import (
 	"crypto/hmac"
 	"encoding/hex"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"strconv"
 	"strings"
@@ -83,12 +82,12 @@ func skipContentSha256Cksum(r *http.Request) bool {
 // Returns SHA256 for calculating canonical-request.
 func getContentSha256Cksum(r *http.Request, stype serviceType) string {
 	if stype == serviceSTS {
-		payload, err := ioutil.ReadAll(io.LimitReader(r.Body, stsRequestBodyLimit))
+		payload, err := io.ReadAll(io.LimitReader(r.Body, stsRequestBodyLimit))
 		if err != nil {
 			logger.CriticalIf(GlobalContext, err)
 		}
 		sum256 := sha256.Sum256(payload)
-		r.Body = ioutil.NopCloser(bytes.NewReader(payload))
+		r.Body = io.NopCloser(bytes.NewReader(payload))
 		return hex.EncodeToString(sum256[:])
 	}
 

cmd/storage-datatypes_test.go

@@ -20,7 +20,7 @@ package cmd
 import (
 	"bytes"
 	"encoding/gob"
-	"io/ioutil"
+	"io"
 	"testing"
 	"time"
 
@@ -125,7 +125,7 @@ func BenchmarkEncodeDiskInfoMsgp(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		err := msgp.Encode(ioutil.Discard, &v)
+		err := msgp.Encode(io.Discard, &v)
 		if err != nil {
 			b.Fatal(err)
 		}
@@ -146,7 +146,7 @@ func BenchmarkEncodeDiskInfoGOB(b *testing.B) {
 		Error:     "",
 	}
 
-	enc := gob.NewEncoder(ioutil.Discard)
+	enc := gob.NewEncoder(io.Discard)
 	b.SetBytes(1)
 	b.ReportAllocs()
 	b.ResetTimer()
@@ -200,7 +200,7 @@ func BenchmarkEncodeFileInfoMsgp(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		err := msgp.Encode(ioutil.Discard, &v)
+		err := msgp.Encode(io.Discard, &v)
 		if err != nil {
 			b.Fatal(err)
 		}
@@ -209,7 +209,7 @@ func BenchmarkEncodeFileInfoMsgp(b *testing.B) {
 
 func BenchmarkEncodeFileInfoGOB(b *testing.B) {
 	v := FileInfo{Volume: "testbucket", Name: "src/compress/zlib/reader_test.go", VersionID: "", IsLatest: true, Deleted: false, DataDir: "5e0153cc-621a-4267-8cb6-4919140d53b3", XLV1: false, ModTime: UTCNow(), Size: 3430, Mode: 0x0, Metadata: map[string]string{"X-Minio-Internal-Server-Side-Encryption-Iv": "jIJPsrkkVYYMvc7edBrNl+7zcM7+ZwXqMb/YAjBO/ck=", "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Key-Id": "my-minio-key", "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Sealed-Key": "IAAfAP2p7ZLv3UpLwBnsKkF2mtWba0qoY42tymK0szRgGvAxBNcXyHXYooe9dQpeeEJWgKUa/8R61oCy1mFwIg==", "X-Minio-Internal-Server-Side-Encryption-S3-Sealed-Key": "IAAfAPFYRDkHVirJBJxBixNj3PLWt78dFuUTyTLIdLG820J7XqLPBO4gpEEEWw/DoTsJIb+apnaem+rKtQ1h3Q==", "X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm": "DAREv2-HMAC-SHA256", "content-type": "application/octet-stream", "etag": "20000f00e2c3709dc94905c6ce31e1cadbd1c064e14acdcd44cf0ac2db777eeedd88d639fcd64de16851ade8b21a9a1a"}, Parts: []ObjectPartInfo{{ETag: "", Number: 1, Size: 3430, ActualSize: 3398}}, Erasure: ErasureInfo{Algorithm: "reedsolomon", DataBlocks: 2, ParityBlocks: 2, BlockSize: 10485760, Index: 3, Distribution: []int{3, 4, 1, 2}, Checksums: []ChecksumInfo{{PartNumber: 1, Algorithm: 0x3, Hash: []uint8{}}}}}
-	enc := gob.NewEncoder(ioutil.Discard)
+	enc := gob.NewEncoder(io.Discard)
 	b.SetBytes(1)
 	b.ReportAllocs()
 	b.ResetTimer()

cmd/storage-rest-client.go

@@ -25,7 +25,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/url"
 	"path"
 	"strconv"
@@ -363,7 +362,7 @@ func (client *storageRESTClient) CreateFile(ctx context.Context, volume, path st
 	values.Set(storageRESTVolume, volume)
 	values.Set(storageRESTFilePath, path)
 	values.Set(storageRESTLength, strconv.Itoa(int(size)))
-	respBody, err := client.call(ctx, storageRESTMethodCreateFile, values, ioutil.NopCloser(reader), size)
+	respBody, err := client.call(ctx, storageRESTMethodCreateFile, values, io.NopCloser(reader), size)
 	defer xhttp.DrainBody(respBody)
 	if err != nil {
 		return err
@@ -541,7 +540,7 @@ func (client *storageRESTClient) ReadAll(ctx context.Context, volume string, pat
 		return nil, err
 	}
 	defer xhttp.DrainBody(respBody)
-	return ioutil.ReadAll(respBody)
+	return io.ReadAll(respBody)
 }
 
 // ReadFileStream - returns a reader for the requested file.

cmd/storage-rest-server.go

@@ -26,7 +26,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os/user"
 	"path"
@@ -943,7 +942,7 @@ func waitForHTTPResponse(respBody io.Reader) (io.Reader, error) {
 		case 0:
 			return reader, nil
 		case 1:
-			errorText, err := ioutil.ReadAll(reader)
+			errorText, err := io.ReadAll(reader)
 			if err != nil {
 				return nil, err
 			}
@@ -1077,7 +1076,7 @@ func waitForHTTPStream(respBody io.ReadCloser, w io.Writer) error {
 			}
 			return err
 		case 1:
-			errorText, err := ioutil.ReadAll(respBody)
+			errorText, err := io.ReadAll(respBody)
 			if err != nil {
 				return err
 			}

cmd/test-utils_test.go

@@ -38,7 +38,6 @@ import (
 	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/big"
 	"math/rand"
 	"net"
@@ -100,7 +99,7 @@ func TestMain(m *testing.M) {
 	globalIsDistErasure = false
 
 	// Disable printing console messages during tests.
-	color.Output = ioutil.Discard
+	color.Output = io.Discard
 	// Minimum is error logs for testing
 	logger.MinimumLogLevel = logger.ErrorLvl
 
@@ -530,12 +529,12 @@ func truncateChunkByHalfSigv4(req *http.Request) (*http.Request, error) {
 
 	newChunkHdr := []byte(fmt.Sprintf("%s"+s3ChunkSignatureStr+"%s\r\n",
 		hexChunkSize, chunkSignature))
-	newChunk, err := ioutil.ReadAll(bufReader)
+	newChunk, err := io.ReadAll(bufReader)
 	if err != nil {
 		return nil, err
 	}
 	newReq := req
-	newReq.Body = ioutil.NopCloser(
+	newReq.Body = io.NopCloser(
 		bytes.NewReader(bytes.Join([][]byte{newChunkHdr, newChunk[:len(newChunk)/2]},
 			[]byte(""))),
 	)
@@ -552,14 +551,14 @@ func malformDataSigV4(req *http.Request, newByte byte) (*http.Request, error) {
 
 	newChunkHdr := []byte(fmt.Sprintf("%s"+s3ChunkSignatureStr+"%s\r\n",
 		hexChunkSize, chunkSignature))
-	newChunk, err := ioutil.ReadAll(bufReader)
+	newChunk, err := io.ReadAll(bufReader)
 	if err != nil {
 		return nil, err
 	}
 
 	newChunk[0] = newByte
 	newReq := req
-	newReq.Body = ioutil.NopCloser(
+	newReq.Body = io.NopCloser(
 		bytes.NewReader(bytes.Join([][]byte{newChunkHdr, newChunk},
 			[]byte(""))),
 	)
@@ -579,13 +578,13 @@ func malformChunkSizeSigV4(req *http.Request, badSize int64) (*http.Request, err
 	newHexChunkSize := []byte(fmt.Sprintf("%x", n))
 	newChunkHdr := []byte(fmt.Sprintf("%s"+s3ChunkSignatureStr+"%s\r\n",
 		newHexChunkSize, chunkSignature))
-	newChunk, err := ioutil.ReadAll(bufReader)
+	newChunk, err := io.ReadAll(bufReader)
 	if err != nil {
 		return nil, err
 	}
 
 	newReq := req
-	newReq.Body = ioutil.NopCloser(
+	newReq.Body = io.NopCloser(
 		bytes.NewReader(bytes.Join([][]byte{newChunkHdr, newChunk},
 			[]byte(""))),
 	)
@@ -711,10 +710,10 @@ func newTestStreamingRequest(method, urlStr string, dataLength, chunkSize int64,
 	}
 
 	if body == nil {
-		// this is added to avoid panic during ioutil.ReadAll(req.Body).
+		// this is added to avoid panic during io.ReadAll(req.Body).
 		// th stack trace can be found here  https://github.com/minio/minio/pull/2074 .
 		// This is very similar to https://github.com/golang/go/issues/7527.
-		req.Body = ioutil.NopCloser(bytes.NewReader([]byte("")))
+		req.Body = io.NopCloser(bytes.NewReader([]byte("")))
 	}
 
 	contentLength := calculateStreamContentLength(dataLength, chunkSize)
@@ -728,7 +727,7 @@ func newTestStreamingRequest(method, urlStr string, dataLength, chunkSize int64,
 	body.Seek(0, 0)
 
 	// Add body
-	req.Body = ioutil.NopCloser(body)
+	req.Body = io.NopCloser(body)
 	req.ContentLength = contentLength
 
 	return req, nil
@@ -779,7 +778,7 @@ func assembleStreamingChunks(req *http.Request, body io.ReadSeeker, chunkSize in
 		}
 
 	}
-	req.Body = ioutil.NopCloser(bytes.NewReader(stream))
+	req.Body = io.NopCloser(bytes.NewReader(stream))
 	return req, nil
 }
 
@@ -1077,7 +1076,7 @@ func newTestRequest(method, urlStr string, contentLength int64, body io.ReadSeek
 	case body == nil:
 		hashedPayload = getSHA256Hash([]byte{})
 	default:
-		payloadBytes, err := ioutil.ReadAll(body)
+		payloadBytes, err := io.ReadAll(body)
 		if err != nil {
 			return nil, err
 		}
@@ -1455,7 +1454,7 @@ func getListenNotificationURL(endPoint, bucketName string, prefixes, suffixes, e
 func getRandomDisks(N int) ([]string, error) {
 	var erasureDisks []string
 	for i := 0; i < N; i++ {
-		path, err := ioutil.TempDir(globalTestTmpDir, "minio-")
+		path, err := os.MkdirTemp(globalTestTmpDir, "minio-")
 		if err != nil {
 			// Remove directories created so far.
 			removeRoots(erasureDisks)
@@ -1586,14 +1585,14 @@ func ExecObjectLayerAPIAnonTest(t *testing.T, obj ObjectLayer, testName, bucketN
 	rec := httptest.NewRecorder()
 	// reading the body to preserve it so that it can be used again for second attempt of sending unsigned HTTP request.
 	// If the body is read in the handler the same request cannot be made use of.
-	buf, err := ioutil.ReadAll(anonReq.Body)
+	buf, err := io.ReadAll(anonReq.Body)
 	if err != nil {
 		t.Fatal(failTestStr(anonTestStr, err.Error()))
 	}
 
 	// creating 2 read closer (to set as request body) from the body content.
-	readerOne := ioutil.NopCloser(bytes.NewBuffer(buf))
-	readerTwo := ioutil.NopCloser(bytes.NewBuffer(buf))
+	readerOne := io.NopCloser(bytes.NewBuffer(buf))
+	readerTwo := io.NopCloser(bytes.NewBuffer(buf))
 
 	anonReq.Body = readerOne
 
@@ -1610,7 +1609,7 @@ func ExecObjectLayerAPIAnonTest(t *testing.T, obj ObjectLayer, testName, bucketN
 	if anonReq.Method != http.MethodHead {
 		// read the response body.
 		var actualContent []byte
-		actualContent, err = ioutil.ReadAll(rec.Body)
+		actualContent, err = io.ReadAll(rec.Body)
 		if err != nil {
 			t.Fatal(failTestStr(anonTestStr, fmt.Sprintf("Failed parsing response body: <ERROR> %v", err)))
 		}
@@ -1640,7 +1639,7 @@ func ExecObjectLayerAPIAnonTest(t *testing.T, obj ObjectLayer, testName, bucketN
 	// verify the response body for `ErrAccessDenied` message =.
 	if anonReq.Method != http.MethodHead {
 		// read the response body.
-		actualContent, err := ioutil.ReadAll(rec.Body)
+		actualContent, err := io.ReadAll(rec.Body)
 		if err != nil {
 			t.Fatal(failTestStr(unknownSignTestStr, fmt.Sprintf("Failed parsing response body: <ERROR> %v", err)))
 		}
@@ -1692,7 +1691,7 @@ func ExecObjectLayerAPINilTest(t TestErrHandler, bucketName, objectName, instanc
 	// for other type of HTTP requests compare the response body content with the expected one.
 	if req.Method != http.MethodHead {
 		// read the response body.
-		actualContent, err := ioutil.ReadAll(rec.Body)
+		actualContent, err := io.ReadAll(rec.Body)
 		if err != nil {
 			t.Fatalf("MinIO %s: Failed parsing response body: <ERROR> %v", instanceType, err)
 		}
@@ -2234,7 +2233,7 @@ func uploadTestObject(t *testing.T, apiRouter http.Handler, creds auth.Credentia
 
 	checkRespErr := func(rec *httptest.ResponseRecorder, exp int) {
 		if rec.Code != exp {
-			b, err := ioutil.ReadAll(rec.Body)
+			b, err := io.ReadAll(rec.Body)
 			t.Fatalf("Expected: %v, Got: %v, Body: %s, err: %v", exp, rec.Code, string(b), err)
 		}
 	}

cmd/update.go

@@ -26,7 +26,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
@@ -334,7 +333,7 @@ func downloadReleaseURL(u *url.URL, timeout time.Duration, mode string) (content
 		}
 	}
 
-	contentBytes, err := ioutil.ReadAll(resp.Body)
+	contentBytes, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return content, AdminError{
 			Code:       AdminUpdateUnexpectedFailure,
@@ -522,7 +521,7 @@ func downloadBinary(u *url.URL, mode string) (readerReturn []byte, err error) {
 	}
 
 	// convert a Reader to bytes
-	binaryFile, err := ioutil.ReadAll(reader)
+	binaryFile, err := io.ReadAll(reader)
 	if err != nil {
 		return nil, err
 	}

cmd/update_test.go

@@ -20,7 +20,6 @@ package cmd
 import (
 	"encoding/hex"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -233,7 +232,7 @@ func TestIsKubernetes(t *testing.T) {
 // Tests if the environment we are running is Helm chart.
 func TestGetHelmVersion(t *testing.T) {
 	createTempFile := func(content string) string {
-		tmpfile, err := ioutil.TempFile("", "helm-testfile-")
+		tmpfile, err := os.CreateTemp("", "helm-testfile-")
 		if err != nil {
 			t.Fatalf("Unable to create temporary file. %s", err)
 		}

cmd/utils.go

@@ -26,7 +26,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"net/url"
@@ -301,7 +300,7 @@ func startProfiler(profilerType string) (minioProfiler, error) {
 	// library creates to store profiling data.
 	switch madmin.ProfilerType(profilerType) {
 	case madmin.ProfilerCPU:
-		dirPath, err := ioutil.TempDir("", "profile")
+		dirPath, err := os.MkdirTemp("", "profile")
 		if err != nil {
 			return nil, err
 		}
@@ -331,7 +330,7 @@ func startProfiler(profilerType string) (minioProfiler, error) {
 		if n := runtime.NumGoroutine(); n > 10000 && !globalIsCICD {
 			return nil, fmt.Errorf("unable to perform CPU IO profile with %d goroutines", n)
 		}
-		dirPath, err := ioutil.TempDir("", "profile")
+		dirPath, err := os.MkdirTemp("", "profile")
 		if err != nil {
 			return nil, err
 		}
@@ -396,7 +395,7 @@ func startProfiler(profilerType string) (minioProfiler, error) {
 			return buf.Bytes(), err
 		}
 	case madmin.ProfilerTrace:
-		dirPath, err := ioutil.TempDir("", "profile")
+		dirPath, err := os.MkdirTemp("", "profile")
 		if err != nil {
 			return nil, err
 		}
@@ -1184,7 +1183,7 @@ func MockOpenIDTestUserInteraction(ctx context.Context, pro OpenIDClientAppParam
 		return "", fmt.Errorf("request err: %v", err)
 	}
 	// {
-	// 	bodyBuf, err := ioutil.ReadAll(resp.Body)
+	// 	bodyBuf, err := io.ReadAll(resp.Body)
 	// 	if err != nil {
 	// 		return "", fmt.Errorf("Error reading body: %v", err)
 	// 	}
@@ -1206,7 +1205,7 @@ func MockOpenIDTestUserInteraction(ctx context.Context, pro OpenIDClientAppParam
 		return "", fmt.Errorf("post form err: %v", err)
 	}
 	// fmt.Printf("resp: %#v %#v\n", resp.StatusCode, resp.Header)
-	// bodyBuf, err := ioutil.ReadAll(resp.Body)
+	// bodyBuf, err := io.ReadAll(resp.Body)
 	// if err != nil {
 	// 	return "", fmt.Errorf("Error reading body: %v", err)
 	// }

cmd/utils_test.go

@@ -22,7 +22,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
@@ -343,7 +342,7 @@ func TestJSONLoad(t *testing.T) {
 
 // Test jsonSave.
 func TestJSONSave(t *testing.T) {
-	f, err := ioutil.TempFile("", "")
+	f, err := os.CreateTemp("", "")
 	if err != nil {
 		t.Fatal(err)
 	}

cmd/xl-storage-format-v2_test.go

@@ -37,7 +37,6 @@ import (
 	"github.com/klauspost/compress/zstd"
 	"github.com/minio/minio/internal/bucket/lifecycle"
 	xhttp "github.com/minio/minio/internal/http"
-	"github.com/minio/minio/internal/ioutil"
 )
 
 func TestReadXLMetaNoData(t *testing.T) {
@@ -405,7 +404,7 @@ func TestDeleteVersionWithSharedDataDir(t *testing.T) {
 }
 
 func Benchmark_mergeXLV2Versions(b *testing.B) {
-	data, err := ioutil.ReadFile("testdata/xl.meta-v1.2.zst")
+	data, err := os.ReadFile("testdata/xl.meta-v1.2.zst")
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -454,7 +453,7 @@ func Benchmark_mergeXLV2Versions(b *testing.B) {
 }
 
 func Benchmark_xlMetaV2Shallow_Load(b *testing.B) {
-	data, err := ioutil.ReadFile("testdata/xl.meta-v1.2.zst")
+	data, err := os.ReadFile("testdata/xl.meta-v1.2.zst")
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -501,7 +500,7 @@ func Benchmark_xlMetaV2Shallow_Load(b *testing.B) {
 
 func Test_xlMetaV2Shallow_Load(t *testing.T) {
 	// Load Legacy
-	data, err := ioutil.ReadFile("testdata/xl.meta-v1.2.zst")
+	data, err := os.ReadFile("testdata/xl.meta-v1.2.zst")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -561,7 +560,7 @@ func Test_xlMetaV2Shallow_Load(t *testing.T) {
 }
 
 func Test_mergeXLV2Versions(t *testing.T) {
-	dataZ, err := ioutil.ReadFile("testdata/xl-meta-consist.zip")
+	dataZ, err := os.ReadFile("testdata/xl-meta-consist.zip")
 	if err != nil {
 		t.Fatal(err)
 	}

cmd/xl-storage.go

@@ -24,7 +24,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/url"
 	"os"
 	pathutil "path"
@@ -379,7 +378,7 @@ func (s *xlStorage) SetDiskLoc(poolIdx, setIdx, diskIdx int) {
 func (s *xlStorage) Healing() *healingTracker {
 	healingFile := pathJoin(s.diskPath, minioMetaBucket,
 		bucketMetaPrefix, healingTrackerFilename)
-	b, err := ioutil.ReadFile(healingFile)
+	b, err := os.ReadFile(healingFile)
 	if err != nil {
 		return nil
 	}
@@ -676,7 +675,7 @@ func (s *xlStorage) GetDiskID() (string, error) {
 	}
 
 	formatFile := pathJoin(s.diskPath, minioMetaBucket, formatConfigFile)
-	b, err := ioutil.ReadFile(formatFile)
+	b, err := os.ReadFile(formatFile)
 	if err != nil {
 		// If the disk is still not initialized.
 		if osIsNotExist(err) {
@@ -1471,7 +1470,7 @@ func (s *xlStorage) readAllData(ctx context.Context, volumeDir string, filePath
 	// Get size for precise allocation.
 	stat, err := f.Stat()
 	if err != nil {
-		buf, err = ioutil.ReadAll(r)
+		buf, err = io.ReadAll(r)
 		return buf, dmTime, osErrToFileErr(err)
 	}
 	if stat.IsDir() {

cmd/xl-storage_test.go

@@ -23,7 +23,6 @@ import (
 	"crypto/rand"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	slashpath "path"
 	"runtime"
@@ -145,7 +144,7 @@ func createPermDeniedFile(t *testing.T) (permDeniedDir string) {
 		t.Fatalf(fmt.Sprintf("Unable to create temporary directory %v. %v", slashpath.Join(permDeniedDir, "mybucket"), err))
 	}
 
-	if err = ioutil.WriteFile(slashpath.Join(permDeniedDir, "mybucket", "myobject"), []byte(""), 0o400); err != nil {
+	if err = os.WriteFile(slashpath.Join(permDeniedDir, "mybucket", "myobject"), []byte(""), 0o400); err != nil {
 		t.Fatalf(fmt.Sprintf("Unable to create file %v. %v", slashpath.Join(permDeniedDir, "mybucket", "myobject"), err))
 	}
 
@@ -197,7 +196,7 @@ func TestXLStorageIsDirEmpty(t *testing.T) {
 
 	// Should give false for not-a-directory.
 	dir2 := slashpath.Join(tmp, "file")
-	err := ioutil.WriteFile(dir2, []byte("hello"), 0o777)
+	err := os.WriteFile(dir2, []byte("hello"), 0o777)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -254,7 +253,7 @@ func TestXLStorageReadVersion(t *testing.T) {
 		t.Fatalf("Unable to cfgreate xlStorage test setup, %s", err)
 	}
 
-	xlMeta, _ := ioutil.ReadFile("testdata/xl.meta")
+	xlMeta, _ := os.ReadFile("testdata/xl.meta")
 
 	// Create files for the test cases.
 	if err = xlStorage.MakeVol(context.Background(), "exists"); err != nil {
@@ -472,7 +471,7 @@ func TestXLStorageMakeVol(t *testing.T) {
 
 	// Setup test environment.
 	// Create a file.
-	if err := ioutil.WriteFile(slashpath.Join(path, "vol-as-file"), []byte{}, os.ModePerm); err != nil {
+	if err := os.WriteFile(slashpath.Join(path, "vol-as-file"), []byte{}, os.ModePerm); err != nil {
 		t.Fatalf("Unable to create file, %s", err)
 	}
 	// Create a directory.
@@ -566,7 +565,7 @@ func TestXLStorageDeleteVol(t *testing.T) {
 	if err = os.Mkdir(vol, 0o777); err != nil {
 		t.Fatalf("Unable to create directory, %s", err)
 	}
-	if err = ioutil.WriteFile(slashpath.Join(vol, "test-file"), []byte{}, os.ModePerm); err != nil {
+	if err = os.WriteFile(slashpath.Join(vol, "test-file"), []byte{}, os.ModePerm); err != nil {
 		t.Fatalf("Unable to create file, %s", err)
 	}
 
@@ -1328,7 +1327,7 @@ func TestXLStorageFormatFileChange(t *testing.T) {
 	}
 
 	// Change the format.json such that "this" is changed to "randomid".
-	if err = ioutil.WriteFile(pathJoin(xlStorage.String(), minioMetaBucket, formatConfigFile), []byte(`{"version":"1","format":"xl","id":"592a41c2-b7cc-4130-b883-c4b5cb15965b","xl":{"version":"3","this":"randomid","sets":[["e07285a6-8c73-4962-89c6-047fb939f803","33b8d431-482d-4376-b63c-626d229f0a29","cff6513a-4439-4dc1-bcaa-56c9e880c352","randomid","9c9f21d5-1f15-4737-bce6-835faa0d9626","0a59b346-1424-4fc2-9fa2-a2e80541d0c1","7924a3dc-b69a-4971-9a2e-014966d6aebb","4d2b8dd9-4e48-444b-bdca-c89194b26042"]],"distributionAlgo":"CRCMOD"}}`), 0o644); err != nil {
+	if err = os.WriteFile(pathJoin(xlStorage.String(), minioMetaBucket, formatConfigFile), []byte(`{"version":"1","format":"xl","id":"592a41c2-b7cc-4130-b883-c4b5cb15965b","xl":{"version":"3","this":"randomid","sets":[["e07285a6-8c73-4962-89c6-047fb939f803","33b8d431-482d-4376-b63c-626d229f0a29","cff6513a-4439-4dc1-bcaa-56c9e880c352","randomid","9c9f21d5-1f15-4737-bce6-835faa0d9626","0a59b346-1424-4fc2-9fa2-a2e80541d0c1","7924a3dc-b69a-4971-9a2e-014966d6aebb","4d2b8dd9-4e48-444b-bdca-c89194b26042"]],"distributionAlgo":"CRCMOD"}}`), 0o644); err != nil {
 		t.Fatalf("ioutil.WriteFile failed with %s", err)
 	}