fix golint complaints

8 files changed, 29 insertions, 21 deletions

diff --git a/internal/cryptocore/cryptocore.go b/internal/cryptocore/cryptocore.go
index 2c352c2..2e02c3a 100644
--- a/internal/cryptocore/cryptocore.go
+++ b/internal/cryptocore/cryptocore.go
@@ -15,7 +15,7 @@ import (
 	"github.com/rfjakob/gocryptfs/internal/stupidgcm"
 )
 
-// BackendTypeEnum indicates the type of AEAD backend in use.
+// AEADTypeEnum indicates the type of AEAD backend in use.
 type AEADTypeEnum int
 
 const (
diff --git a/internal/exitcodes/exitcodes.go b/internal/exitcodes/exitcodes.go
index 908e714..ae00118 100644
--- a/internal/exitcodes/exitcodes.go
+++ b/internal/exitcodes/exitcodes.go
@@ -10,12 +10,13 @@ import (
 const (
 	// Other error - please inspect the message
 	Other = 11
-	// The password was incorrect
+	// PasswordIncorrect - the password was incorrect
 	PasswordIncorrect = 12
 	// TODO several other exit codes are defined in main.go. These will be
 	// ported over here.
 )
 
+// Err wraps and error with an associated numeric exit code
 type Err struct {
 	error
 	code int
@@ -29,6 +30,8 @@ func NewErr(msg string, code int) Err {
 	}
 }
 
+// Exit extracts the numeric exit code from "err" (if available) and exits the
+// application.
 func Exit(err error) {
 	err2, ok := err.(Err)
 	if !ok {
diff --git a/internal/fusefrontend/file_allocate_truncate.go b/internal/fusefrontend/file_allocate_truncate.go
index 0e12981..ae3dd41 100644
--- a/internal/fusefrontend/file_allocate_truncate.go
+++ b/internal/fusefrontend/file_allocate_truncate.go
@@ -187,13 +187,13 @@ func (f *file) truncateGrowFile(oldPlainSz uint64, newPlainSz uint64) fuse.Statu
 	if oldPlainSz > 0 {
 		n1 = f.contentEnc.PlainOffToBlockNo(oldPlainSz - 1)
 	}
-	newEofOffset := newPlainSz - 1
-	n2 := f.contentEnc.PlainOffToBlockNo(newEofOffset)
+	newEOFOffset := newPlainSz - 1
+	n2 := f.contentEnc.PlainOffToBlockNo(newEOFOffset)
 	// The file is grown within one block, no need to pad anything.
 	// Write a single zero to the last byte and let doWrite figure out the RMW.
 	if n1 == n2 {
 		buf := make([]byte, 1)
-		_, status := f.doWrite(buf, int64(newEofOffset))
+		_, status := f.doWrite(buf, int64(newEOFOffset))
 		return status
 	}
 	// The truncate creates at least one new block.
@@ -224,6 +224,6 @@ func (f *file) truncateGrowFile(oldPlainSz uint64, newPlainSz uint64) fuse.Statu
 	// The new size is NOT aligned, so we need to write a partial block.
 	// Write a single zero to the last byte and let doWrite figure it out.
 	buf := make([]byte, 1)
-	_, status := f.doWrite(buf, int64(newEofOffset))
+	_, status := f.doWrite(buf, int64(newEOFOffset))
 	return status
 }
diff --git a/internal/fusefrontend/fs.go b/internal/fusefrontend/fs.go
index 4aa4ffd..b38e362 100644
--- a/internal/fusefrontend/fs.go
+++ b/internal/fusefrontend/fs.go
@@ -45,7 +45,7 @@ func NewFS(args Args) *FS {
 	nameTransform := nametransform.New(cryptoCore.EMECipher, args.LongNames, args.Raw64)
 
 	if args.SerializeReads {
-		serialize_reads.Init()
+		serialize_reads.InitSerializer()
 	}
 
 	return &FS{
diff --git a/internal/fusefrontend_reverse/rfs.go b/internal/fusefrontend_reverse/rfs.go
index 3c52244..06bbfe9 100644
--- a/internal/fusefrontend_reverse/rfs.go
+++ b/internal/fusefrontend_reverse/rfs.go
@@ -182,13 +182,13 @@ func (rfs *ReverseFS) GetAttr(relPath string, context *fuse.Context) (*fuse.Attr
 // Access - FUSE call
 func (rfs *ReverseFS) Access(relPath string, mode uint32, context *fuse.Context) fuse.Status {
 	if rfs.isTranslatedConfig(relPath) || rfs.isDirIV(relPath) || rfs.isNameFile(relPath) {
+		// access(2) R_OK flag for checking if the file is readable, always 4 as defined in POSIX.
+		ROK := uint32(0x4)
 		// Virtual files can always be read and never written
-		var R_OK uint32 = 4
-		if mode == R_OK || mode == 0 {
+		if mode == ROK || mode == 0 {
 			return fuse.OK
-		} else {
-			return fuse.EPERM
 		}
+		return fuse.EPERM
 	}
 	absPath, err := rfs.abs(rfs.decryptPath(relPath))
 	if err != nil {
diff --git a/internal/serialize_reads/sr.go b/internal/serialize_reads/sr.go
index 0f623d3..9b45bf6 100644
--- a/internal/serialize_reads/sr.go
+++ b/internal/serialize_reads/sr.go
@@ -8,7 +8,8 @@ import (
 	"github.com/rfjakob/gocryptfs/internal/tlog"
 )
 
-type SerializerStruct struct {
+// serializerState is used by the Wait and Done functions
+type serializerState struct {
 	// we get submissions through the "input" channel
 	input chan *submission
 	// q = Queue
@@ -37,7 +38,7 @@ type submission struct {
 	size int
 }
 
-func (sr *SerializerStruct) wait(offset int64, size int) {
+func (sr *serializerState) wait(offset int64, size int) {
 	ch := make(chan struct{})
 	sb := &submission{
 		ch:     ch,
@@ -52,7 +53,7 @@ func (sr *SerializerStruct) wait(offset int64, size int) {
 
 // push returns true if the queue is full after the element has been stored.
 // It panics if it did not have space to store the element.
-func (sr *SerializerStruct) push(sb *submission) (full bool) {
+func (sr *serializerState) push(sb *submission) (full bool) {
 	free := 0
 	stored := false
 	for i, v := range sr.q {
@@ -77,7 +78,7 @@ func (sr *SerializerStruct) push(sb *submission) (full bool) {
 }
 
 // pop the submission with the lowest offset off the queue
-func (sr *SerializerStruct) pop() *submission {
+func (sr *serializerState) pop() *submission {
 	var winner *submission
 	var winnerIndex int
 	for i, v := range sr.q {
@@ -101,7 +102,7 @@ func (sr *SerializerStruct) pop() *submission {
 	return winner
 }
 
-func (sr *SerializerStruct) eventLoop() {
+func (sr *serializerState) eventLoop() {
 	sr.input = make(chan *submission)
 	empty := true
 	for {
@@ -128,7 +129,7 @@ func (sr *SerializerStruct) eventLoop() {
 }
 
 // Unblock a submission and wait for completion
-func (sr *SerializerStruct) unblockOne() (empty bool) {
+func (sr *serializerState) unblockOne() (empty bool) {
 	winner := sr.pop()
 	if winner == nil {
 		return true
@@ -139,10 +140,11 @@ func (sr *SerializerStruct) unblockOne() (empty bool) {
 	return false
 }
 
-var serializer SerializerStruct
+var serializer serializerState
 
-// Called by fusefrontend.NewFS
-func Init() {
+// InitSerializer sets up the internal serializer state and starts the event loop.
+// Called by fusefrontend.NewFS.
+func InitSerializer() {
 	serializer.input = make(chan *submission)
 	serializer.q = make([]*submission, 10)
 	go serializer.eventLoop()
diff --git a/internal/siv_aead/siv_aead.go b/internal/siv_aead/siv_aead.go
index d5df4ac..9b85fde 100644
--- a/internal/siv_aead/siv_aead.go
+++ b/internal/siv_aead/siv_aead.go
@@ -16,13 +16,15 @@ type sivAead struct {
 var _ cipher.AEAD = &sivAead{}
 
 const (
+	// KeyLen is the required key length. The SIV algorithm supports other lengths,
+	// but we only support 64.
 	KeyLen = 64
 )
 
 // New returns a new cipher.AEAD implementation.
 func New(key []byte) cipher.AEAD {
 	if len(key) != KeyLen {
-		// SIV supports more 32, 48 or 64-byte keys, but in gocryptfs we
+		// SIV supports 32, 48 or 64-byte keys, but in gocryptfs we
 		// exclusively use 64.
 		log.Panicf("Key must be %d byte long (you passed %d)", KeyLen, len(key))
 	}
diff --git a/internal/speed/speed.go b/internal/speed/speed.go
index 8732576..f020fca 100644
--- a/internal/speed/speed.go
+++ b/internal/speed/speed.go
@@ -17,6 +17,7 @@ import (
 	"github.com/rfjakob/gocryptfs/internal/stupidgcm"
 )
 
+// Run - run the speed the test and print the results.
 func Run() {
 	bTable := []struct {
 		name      string