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- // Copyright 2015 Google Inc. All Rights Reserved.
- //
- // Licensed under the Apache License, Version 2.0 (the "License");
- // you may not use this file except in compliance with the License.
- // You may obtain a copy of the License at
- //
- // http://www.apache.org/licenses/LICENSE-2.0
- //
- // Unless required by applicable law or agreed to in writing, software
- // distributed under the License is distributed on an "AS IS" BASIS,
- // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- // See the License for the specific language governing permissions and
- // limitations under the License.
- package fuse
- import (
- "fmt"
- "reflect"
- "strings"
- "github.com/jacobsa/fuse/fuseops"
- )
- // Decide on the name of the given op.
- func opName(op interface{}) string {
- // We expect all ops to be pointers.
- t := reflect.TypeOf(op).Elem()
- // Strip the "Op" from "FooOp".
- return strings.TrimSuffix(t.Name(), "Op")
- }
- func describeRequest(op interface{}) (s string) {
- v := reflect.ValueOf(op).Elem()
- // We will set up a comma-separated list of components.
- var components []string
- addComponent := func(format string, v ...interface{}) {
- components = append(components, fmt.Sprintf(format, v...))
- }
- // Include an inode number, if available.
- if f := v.FieldByName("Inode"); f.IsValid() {
- addComponent("inode %v", f.Interface())
- }
- // Include a parent inode number, if available.
- if f := v.FieldByName("Parent"); f.IsValid() {
- addComponent("parent %v", f.Interface())
- }
- // Include a name, if available.
- if f := v.FieldByName("Name"); f.IsValid() {
- addComponent("name %q", f.Interface())
- }
- // Handle special cases.
- switch typed := op.(type) {
- case *interruptOp:
- addComponent("fuseid 0x%08x", typed.FuseID)
- case *unknownOp:
- addComponent("opcode %d", typed.OpCode)
- case *fuseops.SetInodeAttributesOp:
- if typed.Size != nil {
- addComponent("size %d", *typed.Size)
- }
- if typed.Mode != nil {
- addComponent("mode %v", *typed.Mode)
- }
- if typed.Atime != nil {
- addComponent("atime %v", *typed.Atime)
- }
- if typed.Mtime != nil {
- addComponent("mtime %v", *typed.Mtime)
- }
- case *fuseops.ReadFileOp:
- addComponent("handle %d", typed.Handle)
- addComponent("offset %d", typed.Offset)
- addComponent("%d bytes", len(typed.Dst))
- case *fuseops.WriteFileOp:
- addComponent("handle %d", typed.Handle)
- addComponent("offset %d", typed.Offset)
- addComponent("%d bytes", len(typed.Data))
- case *fuseops.RemoveXattrOp:
- addComponent("name %s", typed.Name)
- case *fuseops.GetXattrOp:
- addComponent("name %s", typed.Name)
- case *fuseops.SetXattrOp:
- addComponent("name %s", typed.Name)
- }
- // Use just the name if there is no extra info.
- if len(components) == 0 {
- return opName(op)
- }
- // Otherwise, include the extra info.
- return fmt.Sprintf("%s (%s)", opName(op), strings.Join(components, ", "))
- }
- func describeResponse(op interface{}) string {
- v := reflect.ValueOf(op).Elem()
- // We will set up a comma-separated list of components.
- var components []string
- addComponent := func(format string, v ...interface{}) {
- components = append(components, fmt.Sprintf(format, v...))
- }
- // Include a resulting inode number, if available.
- if f := v.FieldByName("Entry"); f.IsValid() {
- if entry, ok := f.Interface().(fuseops.ChildInodeEntry); ok {
- addComponent("inode %v", entry.Child)
- }
- }
- return fmt.Sprintf("%s", strings.Join(components, ", "))
- }
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