This change provides new implementations of the XL backend operations: - create file - read file - heal file Further this change adds table based tests for all three operations. This affects also the bitrot algorithm integration. Algorithms are now integrated in an idiomatic way (like crypto.Hash). Fixes #4696 Fixes #4649 Fixes #4359
158 lines
3.7 KiB
Go
158 lines
3.7 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"fmt"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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)
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// Holds the current directory path. Used for trimming path in traceError()
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var rootPath string
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// Figure out the rootPath
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func initError() {
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// Root path is automatically determined from the calling function's source file location.
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// Catch the calling function's source file path.
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_, file, _, _ := runtime.Caller(1)
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// Save the directory alone.
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rootPath = filepath.Dir(file)
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}
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// Represents a stack frame in the stack trace.
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type traceInfo struct {
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file string // File where error occurred
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line int // Line where error occurred
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name string // Name of the function where error occurred
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}
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// Error - error type containing cause and the stack trace.
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type Error struct {
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e error // Holds the cause error
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trace []traceInfo // stack trace
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errs []error // Useful for XL to hold errors from all disks
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}
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// Implement error interface.
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func (e Error) Error() string {
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return e.e.Error()
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}
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// Trace - returns stack trace.
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func (e Error) Trace() []string {
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var traceArr []string
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for _, info := range e.trace {
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traceArr = append(traceArr, fmt.Sprintf("%s:%d:%s",
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info.file, info.line, info.name))
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}
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return traceArr
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}
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// NewStorageError - return new Error type.
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func traceError(e error, errs ...error) error {
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if e == nil {
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return nil
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}
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err := &Error{}
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err.e = e
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err.errs = errs
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stack := make([]uintptr, 40)
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length := runtime.Callers(2, stack)
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if length > len(stack) {
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length = len(stack)
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}
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stack = stack[:length]
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for _, pc := range stack {
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pc = pc - 1
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fn := runtime.FuncForPC(pc)
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file, line := fn.FileLine(pc)
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name := fn.Name()
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if hasSuffix(name, "ServeHTTP") {
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break
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}
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if hasSuffix(name, "runtime.") {
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break
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}
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file = strings.TrimPrefix(file, rootPath+string(os.PathSeparator))
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name = strings.TrimPrefix(name, "github.com/minio/minio/cmd.")
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err.trace = append(err.trace, traceInfo{file, line, name})
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}
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return err
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}
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// Returns the underlying cause error.
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func errorCause(err error) error {
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if e, ok := err.(*Error); ok {
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err = e.e
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}
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return err
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}
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// Returns slice of underlying cause error.
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func errorsCause(errs []error) []error {
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cerrs := make([]error, len(errs))
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for i, err := range errs {
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if err == nil {
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continue
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}
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cerrs[i] = errorCause(err)
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}
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return cerrs
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}
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// Collection of basic errors.
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var baseErrs = []error{
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errDiskNotFound,
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errFaultyDisk,
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errFaultyRemoteDisk,
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}
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var baseIgnoredErrs = baseErrs
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// isErrIgnored returns whether given error is ignored or not.
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func isErrIgnored(err error, ignoredErrs ...error) bool {
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err = errorCause(err)
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for _, ignoredErr := range ignoredErrs {
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if ignoredErr == err {
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return true
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}
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}
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return false
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}
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// isErr returns whether given error is exact error.
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func isErr(err error, errs ...error) bool {
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err = errorCause(err)
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for _, exactErr := range errs {
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if err == exactErr {
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return true
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}
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}
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return false
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}
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// traceErrorf behaves like fmt.traceErrorf but also traces the returned error.
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func traceErrorf(format string, args ...interface{}) error {
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return traceError(fmt.Errorf(format, args...))
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}
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