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Fix gometalinter issues

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Signed-off-by: Madhu Rajanna <mrajanna@redhat.com>
This commit is contained in:
Madhu Rajanna
2019-01-29 01:25:10 +05:30
parent 7a0c233c27
commit ca2e475296
9 changed files with 214 additions and 136 deletions
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177
pkg/rbd/controllerserver.go
View File

@ -55,14 +55,14 @@ var (
// info from metadata store
func (cs *ControllerServer) LoadExDataFromMetadataStore() error {
vol := &rbdVolume{}
// nolint: errcheck
// nolint
cs.MetadataStore.ForAll("csi-rbd-vol-", vol, func(identifier string) error {
rbdVolumes[identifier] = vol
return nil
})
snap := &rbdSnapshot{}
// nolint: errcheck
// nolint
cs.MetadataStore.ForAll("csi-rbd-(.*)-snap-", snap, func(identifier string) error {
rbdSnapshots[identifier] = snap
return nil
@ -104,10 +104,10 @@ func (cs *ControllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
// check for the requested capacity and already allocated capacity
if exVol, err := getRBDVolumeByName(req.GetName()); err == nil {
// Since err is nil, it means the volume with the same name already exists
// need to check if the size of exisiting volume is the same as in new
// need to check if the size of existing volume is the same as in new
// request
if exVol.VolSize >= req.GetCapacityRange().GetRequiredBytes() {
// exisiting volume is compatible with new request and should be reused.
// existing volume is compatible with new request and should be reused.
// TODO (sbezverk) Do I need to make sure that RBD volume still exists?
return &csi.CreateVolumeResponse{
Volume: &csi.Volume{
@ -145,22 +145,9 @@ func (cs *ControllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
volSizeGB := int(volSizeBytes / 1024 / 1024 / 1024)
// Check if there is already RBD image with requested name
found, _, _ := rbdStatus(rbdVol, rbdVol.UserID, req.GetSecrets())
if !found {
// if VolumeContentSource is not nil, this request is for snapshot
if req.VolumeContentSource != nil {
if err = cs.checkSnapshot(req, rbdVol); err != nil {
return nil, err
}
} else {
err = createRBDImage(rbdVol, volSizeGB, rbdVol.AdminID, req.GetSecrets())
if err != nil {
glog.Warningf("failed to create volume: %v", err)
return nil, err
}
glog.V(4).Infof("create volume %s", volName)
}
err = cs.checkrbdStatus(rbdVol, req, volSizeGB)
if err != nil {
return nil, err
}
if createErr := cs.MetadataStore.Create(volumeID, rbdVol); createErr != nil {
glog.Warningf("failed to store volume metadata with error: %v", err)
@ -181,6 +168,28 @@ func (cs *ControllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
}, nil
}
func (cs *ControllerServer) checkrbdStatus(rbdVol *rbdVolume, req *csi.CreateVolumeRequest, volSizeGB int) error {
var err error
// Check if there is already RBD image with requested name
found, _, _ := rbdStatus(rbdVol, rbdVol.UserID, req.GetSecrets()) // #nosec
if !found {
// if VolumeContentSource is not nil, this request is for snapshot
if req.VolumeContentSource != nil {
if err = cs.checkSnapshot(req, rbdVol); err != nil {
return err
}
} else {
err = createRBDImage(rbdVol, volSizeGB, rbdVol.AdminID, req.GetSecrets())
if err != nil {
glog.Warningf("failed to create volume: %v", err)
return err
}
glog.V(4).Infof("create volume %s", rbdVol.VolName)
}
}
return nil
}
func (cs *ControllerServer) checkSnapshot(req *csi.CreateVolumeRequest, rbdVol *rbdVolume) error {
snapshot := req.VolumeContentSource.GetSnapshot()
if snapshot == nil {
@ -275,19 +284,10 @@ func (cs *ControllerServer) ControllerPublishVolume(ctx context.Context, req *cs
// CreateSnapshot creates the snapshot in backend and stores metadata
// in store
func (cs *ControllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateSnapshotRequest) (*csi.CreateSnapshotResponse, error) {
if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT); err != nil {
glog.Warningf("invalid create snapshot req: %v", req)
if err := cs.validateSnapshotReq(req); err != nil {
return nil, err
}
// Check sanity of request Snapshot Name, Source Volume Id
if len(req.Name) == 0 {
return nil, status.Error(codes.InvalidArgument, "Snapshot Name cannot be empty")
}
if len(req.SourceVolumeId) == 0 {
return nil, status.Error(codes.InvalidArgument, "Source Volume ID cannot be empty")
}
snapshotNameMutex.LockKey(req.GetName())
defer func() {
@ -338,54 +338,16 @@ func (cs *ControllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateS
rbdSnap.SourceVolumeID = req.GetSourceVolumeId()
rbdSnap.SizeBytes = rbdVolume.VolSize
err = createSnapshot(rbdSnap, rbdSnap.AdminID, req.GetSecrets())
err = cs.doSnapshot(rbdSnap, req.GetSecrets())
// if we already have the snapshot, return the snapshot
if err != nil {
if exitErr, ok := err.(*exec.ExitError); ok {
if status, ok := exitErr.Sys().(syscall.WaitStatus); ok {
if status.ExitStatus() == int(syscall.EEXIST) {
glog.Warningf("Snapshot with the same name: %s, we return this.", req.GetName())
} else {
glog.Warningf("failed to create snapshot: %v", err)
return nil, err
}
} else {
glog.Warningf("failed to create snapshot: %v", err)
return nil, err
}
} else {
glog.Warningf("failed to create snapshot: %v", err)
return nil, err
}
} else {
glog.V(4).Infof("create snapshot %s", snapName)
err = protectSnapshot(rbdSnap, rbdSnap.AdminID, req.GetSecrets())
if err != nil {
err = deleteSnapshot(rbdSnap, rbdSnap.AdminID, req.GetSecrets())
if err != nil {
return nil, fmt.Errorf("snapshot is created but failed to protect and delete snapshot: %v", err)
}
return nil, fmt.Errorf("Snapshot is created but failed to protect snapshot")
}
return nil, err
}
rbdSnap.CreatedAt = ptypes.TimestampNow().GetSeconds()
if createErr := cs.MetadataStore.Create(snapshotID, rbdSnap); createErr != nil {
glog.Warningf("rbd: failed to store snapInfo with error: %v", err)
// Unprotect snapshot
err = unprotectSnapshot(rbdSnap, rbdSnap.AdminID, req.GetSecrets())
if err != nil {
return nil, status.Errorf(codes.Unknown, "This Snapshot should be removed but failed to unprotect snapshot: %s/%s with error: %v", rbdSnap.Pool, rbdSnap.SnapName, err)
}
// Deleting snapshot
glog.V(4).Infof("deleting Snaphot %s", rbdSnap.SnapName)
if err = deleteSnapshot(rbdSnap, rbdSnap.AdminID, req.GetSecrets()); err != nil {
return nil, status.Errorf(codes.Unknown, "This Snapshot should be removed but failed to delete snapshot: %s/%s with error: %v", rbdSnap.Pool, rbdSnap.SnapName, err)
}
return nil, createErr
if err = cs.storeSnapMetadata(rbdSnap, req.GetSecrets()); err != nil {
return nil, err
}
rbdSnapshots[snapshotID] = rbdSnap
@ -402,6 +364,75 @@ func (cs *ControllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateS
}, nil
}
func (cs *ControllerServer) storeSnapMetadata(rbdSnap *rbdSnapshot, secret map[string]string) error {
errCreate := cs.MetadataStore.Create(rbdSnap.SnapID, rbdSnap)
if errCreate != nil {
glog.Warningf("rbd: failed to store snapInfo with error: %v", errCreate)
// Unprotect snapshot
err := unprotectSnapshot(rbdSnap, rbdSnap.AdminID, secret)
if err != nil {
return status.Errorf(codes.Unknown, "This Snapshot should be removed but failed to unprotect snapshot: %s/%s with error: %v", rbdSnap.Pool, rbdSnap.SnapName, err)
}
// Deleting snapshot
glog.V(4).Infof("deleting Snaphot %s", rbdSnap.SnapName)
if err = deleteSnapshot(rbdSnap, rbdSnap.AdminID, secret); err != nil {
return status.Errorf(codes.Unknown, "This Snapshot should be removed but failed to delete snapshot: %s/%s with error: %v", rbdSnap.Pool, rbdSnap.SnapName, err)
}
}
return errCreate
}
func (cs *ControllerServer) validateSnapshotReq(req *csi.CreateSnapshotRequest) error {
if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT); err != nil {
glog.Warningf("invalid create snapshot req: %v", req)
return err
}
// Check sanity of request Snapshot Name, Source Volume Id
if len(req.Name) == 0 {
return status.Error(codes.InvalidArgument, "Snapshot Name cannot be empty")
}
if len(req.SourceVolumeId) == 0 {
return status.Error(codes.InvalidArgument, "Source Volume ID cannot be empty")
}
return nil
}
func (cs *ControllerServer) doSnapshot(rbdSnap *rbdSnapshot, secret map[string]string) error {
err := createSnapshot(rbdSnap, rbdSnap.AdminID, secret)
// if we already have the snapshot, return the snapshot
if err != nil {
if exitErr, ok := err.(*exec.ExitError); ok {
if status, ok := exitErr.Sys().(syscall.WaitStatus); ok {
if status.ExitStatus() == int(syscall.EEXIST) {
glog.Warningf("Snapshot with the same name: %s, we return this.", rbdSnap.SnapName)
} else {
glog.Warningf("failed to create snapshot: %v", err)
return err
}
} else {
glog.Warningf("failed to create snapshot: %v", err)
return err
}
} else {
glog.Warningf("failed to create snapshot: %v", err)
return err
}
} else {
glog.V(4).Infof("create snapshot %s", rbdSnap.SnapName)
err = protectSnapshot(rbdSnap, rbdSnap.AdminID, secret)
if err != nil {
err = deleteSnapshot(rbdSnap, rbdSnap.AdminID, secret)
if err != nil {
return fmt.Errorf("snapshot is created but failed to protect and delete snapshot: %v", err)
}
return fmt.Errorf("Snapshot is created but failed to protect snapshot")
}
}
return nil
}
// DeleteSnapshot deletes the snapshot in backend and removes the
//snapshot metadata from store
func (cs *ControllerServer) DeleteSnapshot(ctx context.Context, req *csi.DeleteSnapshotRequest) (*csi.DeleteSnapshotResponse, error) {

113
pkg/rbd/nodeserver.go
View File

@ -67,47 +67,16 @@ func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublis
}
}()
var volName string
isBlock := req.GetVolumeCapability().GetBlock() != nil
if isBlock {
// Get volName from targetPath
s := strings.Split(targetPath, "/")
volName = s[len(s)-1]
} else {
// Get volName from targetPath
if !strings.HasSuffix(targetPath, "/mount") {
return nil, fmt.Errorf("rbd: malformed the value of target path: %s", targetPath)
}
s := strings.Split(strings.TrimSuffix(targetPath, "/mount"), "/")
volName = s[len(s)-1]
volName, err := ns.getVolumeName(req)
if err != nil {
return nil, err
}
isBlock := req.GetVolumeCapability().GetBlock() != nil
// Check if that target path exists properly
notMnt, err := ns.mounter.IsNotMountPoint(targetPath)
notMnt, err := ns.createTargetPath(targetPath, isBlock)
if err != nil {
if os.IsNotExist(err) {
if isBlock {
// create an empty file
targetPathFile, e := os.OpenFile(targetPath, os.O_CREATE|os.O_RDWR, 0750)
if e != nil {
glog.V(4).Infof("Failed to create targetPath:%s with error: %v", targetPath, err)
return nil, status.Error(codes.Internal, e.Error())
}
if err = targetPathFile.Close(); err != nil {
glog.V(4).Infof("Failed to close targetPath:%s with error: %v", targetPath, err)
return nil, status.Error(codes.Internal, err.Error())
}
} else {
// Create a directory
if err = os.MkdirAll(targetPath, 0750); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
}
notMnt = true
} else {
return nil, status.Error(codes.Internal, err.Error())
}
return nil, err
}
if !notMnt {
@ -125,11 +94,41 @@ func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublis
}
glog.V(4).Infof("rbd image: %s/%s was successfully mapped at %s\n", req.GetVolumeId(), volOptions.Pool, devicePath)
// Publish Path
err = ns.mountVolume(req, devicePath)
if err != nil {
return nil, err
}
return &csi.NodePublishVolumeResponse{}, nil
}
func (ns *NodeServer) getVolumeName(req *csi.NodePublishVolumeRequest) (string, error) {
var volName string
isBlock := req.GetVolumeCapability().GetBlock() != nil
targetPath := req.GetTargetPath()
if isBlock {
// Get volName from targetPath
s := strings.Split(targetPath, "/")
volName = s[len(s)-1]
} else {
// Get volName from targetPath
if !strings.HasSuffix(targetPath, "/mount") {
return "", fmt.Errorf("rbd: malformed the value of target path: %s", targetPath)
}
s := strings.Split(strings.TrimSuffix(targetPath, "/mount"), "/")
volName = s[len(s)-1]
}
return volName, nil
}
func (ns *NodeServer) mountVolume(req *csi.NodePublishVolumeRequest, devicePath string) error {
// Publish Path
fsType := req.GetVolumeCapability().GetMount().GetFsType()
readOnly := req.GetReadonly()
attrib := req.GetVolumeContext()
mountFlags := req.GetVolumeCapability().GetMount().GetMountFlags()
isBlock := req.GetVolumeCapability().GetBlock() != nil
targetPath := req.GetTargetPath()
glog.V(4).Infof("target %v\nisBlock %v\nfstype %v\ndevice %v\nreadonly %v\nattributes %v\n mountflags %v\n",
targetPath, isBlock, fsType, devicePath, readOnly, attrib, mountFlags)
@ -138,7 +137,7 @@ func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublis
if isBlock {
options := []string{"bind"}
if err := diskMounter.Mount(devicePath, targetPath, fsType, options); err != nil {
return nil, err
return err
}
} else {
options := []string{}
@ -147,11 +146,42 @@ func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublis
}
if err := diskMounter.FormatAndMount(devicePath, targetPath, fsType, options); err != nil {
return nil, err
return err
}
}
return nil
}
func (ns *NodeServer) createTargetPath(targetPath string, isBlock bool) (bool, error) {
// Check if that target path exists properly
notMnt, err := ns.mounter.IsNotMountPoint(targetPath)
if err != nil {
if os.IsNotExist(err) {
if isBlock {
// create an empty file
// #nosec
targetPathFile, e := os.OpenFile(targetPath, os.O_CREATE|os.O_RDWR, 0750)
if e != nil {
glog.V(4).Infof("Failed to create targetPath:%s with error: %v", targetPath, err)
return notMnt, status.Error(codes.Internal, e.Error())
}
if err = targetPathFile.Close(); err != nil {
glog.V(4).Infof("Failed to close targetPath:%s with error: %v", targetPath, err)
return notMnt, status.Error(codes.Internal, err.Error())
}
} else {
// Create a directory
if err = os.MkdirAll(targetPath, 0750); err != nil {
return notMnt, status.Error(codes.Internal, err.Error())
}
}
notMnt = true
} else {
return false, status.Error(codes.Internal, err.Error())
}
}
return notMnt, err
return &csi.NodePublishVolumeResponse{}, nil
}
// NodeUnpublishVolume unmounts the volume from the target path
@ -230,6 +260,7 @@ func (ns *NodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpu
}
func resolveBindMountedBlockDevice(mountPath string) (string, error) {
// #nosec
cmd := exec.Command("findmnt", "-n", "-o", "SOURCE", "--first-only", "--target", mountPath)
out, err := cmd.CombinedOutput()
if err != nil {
@ -244,7 +275,7 @@ func parseFindMntResolveSource(out string) (string, error) {
// cut trailing newline
out = strings.TrimSuffix(out, "\n")
// Check if out is a mounted device
reMnt := regexp.MustCompile("^(/[^/]+(?:/[^/]*)*)$")
reMnt := regexp.MustCompile(`^(/[^/]+(?:/[^/]*)*)$`)
if match := reMnt.FindStringSubmatch(out); match != nil {
return match[1], nil
}

38
pkg/rbd/rbd_attach.go
View File

@ -61,6 +61,7 @@ func getRbdDevFromImageAndPool(pool string, image string) (string, bool) {
name := f.Name()
// First match pool, then match name.
poolFile := path.Join(sysPath, name, "pool")
// #nosec
poolBytes, err := ioutil.ReadFile(poolFile)
if err != nil {
glog.V(4).Infof("error reading %s: %v", poolFile, err)
@ -71,6 +72,7 @@ func getRbdDevFromImageAndPool(pool string, image string) (string, bool) {
continue
}
imgFile := path.Join(sysPath, name, "name")
// #nosec
imgBytes, err := ioutil.ReadFile(imgFile)
if err != nil {
glog.V(4).Infof("error reading %s: %v", imgFile, err)
@ -140,12 +142,14 @@ func getNbdDevFromImageAndPool(pool string, image string) (string, bool) {
glog.V(4).Infof("error reading nbd info directory %s: %v", nbdPath, err)
continue
}
// #nosec
pidBytes, err := ioutil.ReadFile(path.Join(nbdPath, "pid"))
if err != nil {
glog.V(5).Infof("did not find valid pid file in dir %s: %v", nbdPath, err)
continue
}
cmdlineFileName := path.Join(hostRootFS, "/proc", strings.TrimSpace(string(pidBytes)), "cmdline")
// #nosec
rawCmdline, err := ioutil.ReadFile(cmdlineFileName)
if err != nil {
glog.V(4).Infof("failed to read cmdline file %s: %v", cmdlineFileName, err)
@ -246,22 +250,11 @@ func attachRBDImage(volOptions *rbdVolume, userID string, credentials map[string
Factor: rbdImageWatcherFactor,
Steps: rbdImageWatcherSteps,
}
err := wait.ExponentialBackoff(backoff, func() (bool, error) {
used, rbdOutput, err := rbdStatus(volOptions, userID, credentials)
if err != nil {
return false, fmt.Errorf("fail to check rbd image status with: (%v), rbd output: (%s)", err, rbdOutput)
}
return !used, nil
})
// return error if rbd image has not become available for the specified timeout
if err == wait.ErrWaitTimeout {
return "", fmt.Errorf("rbd image %s is still being used", imagePath)
}
// return error if any other errors were encountered during wating for the image to become available
err := waitForrbdImage(backoff, volOptions, userID, credentials)
if err != nil {
return "", err
}
mon, err := getMon(volOptions, credentials)
if err != nil {
return "", err
@ -287,6 +280,25 @@ func attachRBDImage(volOptions *rbdVolume, userID string, credentials map[string
return devicePath, nil
}
func waitForrbdImage(backoff wait.Backoff, volOptions *rbdVolume, userID string, credentials map[string]string) error {
image := volOptions.VolName
imagePath := fmt.Sprintf("%s/%s", volOptions.Pool, image)
err := wait.ExponentialBackoff(backoff, func() (bool, error) {
used, rbdOutput, err := rbdStatus(volOptions, userID, credentials)
if err != nil {
return false, fmt.Errorf("fail to check rbd image status with: (%v), rbd output: (%s)", err, rbdOutput)
}
return !used, nil
})
// return error if rbd image has not become available for the specified timeout
if err == wait.ErrWaitTimeout {
return fmt.Errorf("rbd image %s is still being used", imagePath)
}
// return error if any other errors were encountered during waiting for the image to become available
return err
}
func detachRBDDevice(devicePath string) error {
var err error
var output []byte

3
pkg/rbd/rbd_util.go
View File

@ -145,7 +145,7 @@ func createRBDImage(pOpts *rbdVolume, volSz int, adminID string, credentials map
}
// rbdStatus checks if there is watcher on the image.
// It returns true if there is a watcher onthe image, otherwise returns false.
// It returns true if there is a watcher on the image, otherwise returns false.
func rbdStatus(pOpts *rbdVolume, userID string, credentials map[string]string) (bool, string, error) {
var output string
var cmd []byte
@ -221,6 +221,7 @@ func deleteRBDImage(pOpts *rbdVolume, adminID string, credentials map[string]str
}
func execCommand(command string, args []string) ([]byte, error) {
// #nosec
cmd := exec.Command(command, args...)
return cmd.CombinedOutput()
}