setBucketMetadata: Fix a deadlock.

pkg/fs/fs-bucket.go

@@ -223,8 +223,6 @@ func (fs Filesystem) GetBucketMetadata(bucket string) (BucketMetadata, *probe.Er
 
 // SetBucketMetadata - set bucket metadata.
 func (fs Filesystem) SetBucketMetadata(bucket string, metadata map[string]string) *probe.Error {
-	fs.rwLock.Lock()
-	defer fs.rwLock.Unlock()
 	// Input validation.
 	if !IsValidBucketName(bucket) {
 		return probe.NewError(BucketNameInvalid{Bucket: bucket})
@@ -247,7 +245,9 @@ func (fs Filesystem) SetBucketMetadata(bucket string, metadata map[string]string
 		}
 		return probe.NewError(e)
 	}
+	fs.rwLock.RLock()
 	bucketMetadata, ok := fs.buckets.Metadata[bucket]
+	fs.rwLock.RUnlock()
 	if !ok {
 		bucketMetadata = &BucketMetadata{}
 		bucketMetadata.Name = fi.Name()

pkg/fs/postpolicyform.go

@@ -100,7 +100,7 @@ func ParsePostPolicyForm(policy string) (PostPolicyForm, *probe.Error) {
 			for k, v := range condt {
 				if !isString(v) { // Pre-check value type.
 					// All values must be of type string.
-					return parsedPolicy, probe.NewError(fmt.Errorf("Unknown type ‘%s’ of conditional field value ‘%s’ found in POST policy form.",
+					return parsedPolicy, probe.NewError(fmt.Errorf("Unknown type %s of conditional field value %s found in POST policy form.",
 						reflect.TypeOf(condt).String(), condt))
 				}
 				// {"acl": "public-read" } is an alternate way to indicate - [ "eq", "$acl", "public-read" ]
@@ -115,7 +115,7 @@ func ParsePostPolicyForm(policy string) (PostPolicyForm, *probe.Error) {
 			}
 		case []interface{}: // Handle array types.
 			if len(condt) != 3 { // Return error if we have insufficient elements.
-				return parsedPolicy, probe.NewError(fmt.Errorf("Malformed conditional fields ‘%s’ of type ‘%s’ found in POST policy form.",
+				return parsedPolicy, probe.NewError(fmt.Errorf("Malformed conditional fields %s of type %s found in POST policy form.",
 					condt, reflect.TypeOf(condt).String()))
 			}
 			switch toString(condt[0]) {
@@ -123,7 +123,7 @@ func ParsePostPolicyForm(policy string) (PostPolicyForm, *probe.Error) {
 				for _, v := range condt { // Pre-check all values for type.
 					if !isString(v) {
 						// All values must be of type string.
-						return parsedPolicy, probe.NewError(fmt.Errorf("Unknown type ‘%s’ of conditional field value ‘%s’ found in POST policy form.",
+						return parsedPolicy, probe.NewError(fmt.Errorf("Unknown type %s of conditional field value %s found in POST policy form.",
 							reflect.TypeOf(condt).String(), condt))
 					}
 				}
@@ -145,11 +145,11 @@ func ParsePostPolicyForm(policy string) (PostPolicyForm, *probe.Error) {
 				}
 			default:
 				// Condition should be valid.
-				return parsedPolicy, probe.NewError(fmt.Errorf("Unknown type ‘%s’ of conditional field value ‘%s’ found in POST policy form.",
+				return parsedPolicy, probe.NewError(fmt.Errorf("Unknown type %s of conditional field value %s found in POST policy form.",
 					reflect.TypeOf(condt).String(), condt))
 			}
 		default:
-			return parsedPolicy, probe.NewError(fmt.Errorf("Unknown field ‘%s’ of type ‘%s’ found in POST policy form.",
+			return parsedPolicy, probe.NewError(fmt.Errorf("Unknown field %s of type %s found in POST policy form.",
 				condt, reflect.TypeOf(condt).String()))
 		}
 	}

pkg/mimedb/db.go

@@ -19,7 +19,7 @@
 // Definitions are imported from NodeJS mime-db project under MIT license.
 package mimedb
 
-// Mime is a collection of mime types with extension as key and content-type as value.
+// DB - Mime is a collection of mime types with extension as key and content-type as value.
 var DB = map[string]struct {
 	ContentType  string
 	Compressible bool

pkg/mimedb/util/gen-db.go

@@ -49,7 +49,7 @@ const progTempl = `// DO NOT EDIT THIS FILE. IT IS AUTO-GENERATED BY "gen-db.go"
 // Definitions are imported from NodeJS mime-db project under MIT license.
 package mimedb
 
-// Mime is a collection of mime types with extension as key and content-type as value.
+// DB - Mime is a collection of mime types with extension as key and content-type as value.
 var DB = map[string]struct {
 	ContentType  string
 	Compressible bool
@@ -68,8 +68,6 @@ type mimeEntry struct {
 
 type mimeDB map[string]mimeEntry
 
-var ()
-
 //  JSON data from gobindata and parse them into extDB.
 func convertDB(jsonFile string) (mimeDB, error) {
 	// Structure of JSON data from mime-db project.