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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 11:19:16 +05:30
parent ca2e475296
commit 50ba8ed446
8 changed files with 227 additions and 146 deletions
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143
pkg/rbd/rbd_attach.go
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@ -137,42 +137,8 @@ func getNbdDevFromImageAndPool(pool string, image string) (string, bool) {
for i := 0; i < maxNbds; i++ {
nbdPath := basePath + strconv.Itoa(i)
_, err := os.Lstat(nbdPath)
devicePath, err := getnbdDevicePath(nbdPath, imgPath, i)
if err != nil {
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)
continue
}
cmdlineArgs := strings.FieldsFunc(string(rawCmdline), func(r rune) bool {
return r == '\u0000'
})
// Check if this process is mapping a rbd device.
// Only accepted pattern of cmdline is from execRbdMap:
// rbd-nbd map pool/image ...
if len(cmdlineArgs) < 3 || cmdlineArgs[0] != rbdTonbd || cmdlineArgs[1] != "map" {
glog.V(4).Infof("nbd device %s is not used by rbd", nbdPath)
continue
}
if cmdlineArgs[2] != imgPath {
glog.V(4).Infof("rbd-nbd device %s did not match expected image path: %s with path found: %s",
nbdPath, imgPath, cmdlineArgs[2])
continue
}
devicePath := path.Join("/dev", "nbd"+strconv.Itoa(i))
if _, err := os.Lstat(devicePath); err != nil {
glog.Warningf("Stat device %s for imgpath %s failed %v", devicePath, imgPath, err)
continue
}
return devicePath, true
@ -180,6 +146,50 @@ func getNbdDevFromImageAndPool(pool string, image string) (string, bool) {
return "", false
}
func getnbdDevicePath(nbdPath, imgPath string, count int) (string, error) {
_, err := os.Lstat(nbdPath)
if err != nil {
glog.V(4).Infof("error reading nbd info directory %s: %v", nbdPath, err)
return "", err
}
// #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)
return "", err
}
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)
return "", err
}
cmdlineArgs := strings.FieldsFunc(string(rawCmdline), func(r rune) bool {
return r == '\u0000'
})
// Check if this process is mapping a rbd device.
// Only accepted pattern of cmdline is from execRbdMap:
// rbd-nbd map pool/image ...
if len(cmdlineArgs) < 3 || cmdlineArgs[0] != rbdTonbd || cmdlineArgs[1] != "map" {
glog.V(4).Infof("nbd device %s is not used by rbd", nbdPath)
return "", err
}
if cmdlineArgs[2] != imgPath {
glog.V(4).Infof("rbd-nbd device %s did not match expected image path: %s with path found: %s",
nbdPath, imgPath, cmdlineArgs[2])
return "", err
}
devicePath := path.Join("/dev", "nbd"+strconv.Itoa(count))
if _, err := os.Lstat(devicePath); err != nil {
glog.Warningf("Stat device %s for imgpath %s failed %v", devicePath, imgPath, err)
return "", err
}
return devicePath, nil
}
// Stat a path, if it doesn't exist, retry maxRetries times.
func waitForPath(pool, image string, maxRetries int, useNbdDriver bool) (string, bool) {
for i := 0; i < maxRetries; i++ {
@ -216,21 +226,18 @@ func checkRbdNbdTools() bool {
func attachRBDImage(volOptions *rbdVolume, userID string, credentials map[string]string) (string, error) {
var err error
var output []byte
image := volOptions.VolName
imagePath := fmt.Sprintf("%s/%s", volOptions.Pool, image)
useNBD := false
cmdName := rbd
moduleName := rbd
if volOptions.Mounter == rbdTonbd && hasNBD {
useNBD = true
cmdName = rbdTonbd
moduleName = nbd
}
devicePath, found := waitForPath(volOptions.Pool, image, 1, useNBD)
_, found := waitForPath(volOptions.Pool, image, 1, useNBD)
if !found {
attachdetachMutex.LockKey(imagePath)
@ -243,6 +250,7 @@ func attachRBDImage(volOptions *rbdVolume, userID string, credentials map[string
_, err = execCommand("modprobe", []string{moduleName})
if err != nil {
glog.Warningf("rbd: failed to load rbd kernel module:%v", err)
return "", err
}
backoff := wait.Backoff{
@ -250,33 +258,50 @@ func attachRBDImage(volOptions *rbdVolume, userID string, credentials map[string
Factor: rbdImageWatcherFactor,
Steps: rbdImageWatcherSteps,
}
err := waitForrbdImage(backoff, volOptions, userID, credentials)
err = waitForrbdImage(backoff, volOptions, userID, credentials)
if err != nil {
return "", err
}
mon, err := getMon(volOptions, credentials)
if err != nil {
return "", err
}
glog.V(5).Infof("rbd: map mon %s", mon)
key, err := getRBDKey(userID, credentials)
if err != nil {
return "", err
}
output, err = execCommand(cmdName, []string{
"map", imagePath, "--id", userID, "-m", mon, "--key=" + key})
if err != nil {
glog.Warningf("rbd: map error %v, rbd output: %s", err, string(output))
return "", fmt.Errorf("rbd: map failed %v, rbd output: %s", err, string(output))
}
devicePath, found = waitForPath(volOptions.Pool, image, 10, useNBD)
if !found {
return "", fmt.Errorf("Could not map image %s, Timeout after 10s", imagePath)
}
}
devicePath, err := createPath(volOptions, userID, credentials)
return devicePath, err
}
func createPath(volOpt *rbdVolume, userID string, creds map[string]string) (string, error) {
image := volOpt.VolName
imagePath := fmt.Sprintf("%s/%s", volOpt.Pool, image)
mon, err := getMon(volOpt, creds)
if err != nil {
return "", err
}
glog.V(5).Infof("rbd: map mon %s", mon)
key, err := getRBDKey(userID, creds)
if err != nil {
return "", err
}
useNBD := false
cmdName := rbd
if volOpt.Mounter == rbdTonbd && hasNBD {
useNBD = true
cmdName = rbdTonbd
}
output, err := execCommand(cmdName, []string{
"map", imagePath, "--id", userID, "-m", mon, "--key=" + key})
if err != nil {
glog.Warningf("rbd: map error %v, rbd output: %s", err, string(output))
return "", fmt.Errorf("rbd: map failed %v, rbd output: %s", err, string(output))
}
devicePath, found := waitForPath(volOpt.Pool, image, 10, useNBD)
if !found {
return "", fmt.Errorf("Could not map image %s, Timeout after 10s", imagePath)
}
return devicePath, nil
}