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From HrWiggles <...@git.apache.org>
Subject [GitHub] cloudstack pull request #1953: CLOUDSTACK-9794: Unable to attach more than 1...
Date Tue, 21 Feb 2017 22:34:08 GMT
Github user HrWiggles commented on a diff in the pull request:

    https://github.com/apache/cloudstack/pull/1953#discussion_r102336557
  
    --- Diff: server/src/com/cloud/storage/VolumeApiServiceImpl.java ---
    @@ -2639,22 +2639,23 @@ private int getMaxDataVolumesSupported(UserVmVO vm) {
             return maxDataVolumesSupported.intValue();
         }
     
    -    private Long getDeviceId(long vmId, Long deviceId) {
    +    private Long getDeviceId(UserVmVO vm, Long deviceId) {
             // allocate deviceId
    -        List<VolumeVO> vols = _volsDao.findByInstance(vmId);
    +        int maxDataVolumesSupported = getMaxDataVolumesSupported(vm);
    +        List<VolumeVO> vols = _volsDao.findByInstance(vm.getId());
             if (deviceId != null) {
    -            if (deviceId.longValue() > 15 || deviceId.longValue() == 3) {
    -                throw new RuntimeException("deviceId should be 1,2,4-15");
    +            if (deviceId.longValue() > maxDataVolumesSupported || deviceId.longValue()
== 3) {
    +                throw new RuntimeException("deviceId should be 1,2,4-" + maxDataVolumesSupported);
                 }
                 for (VolumeVO vol : vols) {
                     if (vol.getDeviceId().equals(deviceId)) {
    -                    throw new RuntimeException("deviceId " + deviceId + " is used by
vm" + vmId);
    +                    throw new RuntimeException("deviceId " + deviceId + " is used by
vm" + vm.getId());
                     }
                 }
             } else {
                 // allocate deviceId here
                 List<String> devIds = new ArrayList<String>();
    -            for (int i = 1; i < 15; i++) {
    +            for (int i = 1; i < maxDataVolumesSupported; i++) {
    --- End diff --
    
    @sureshanaparti If the condition really should be `i < maxDataVolumesSupported` (which
would make the maximum device id returned by the method be `maxDataVolumesSupported - 1`),
then the check + error message above
    ```
    if (deviceId.longValue() <= 0 || deviceId.longValue() > maxDataVolumesSupported
|| deviceId.longValue() == 3) {
        throw new RuntimeException("deviceId should be 1,2,4-" + maxDataVolumesSupported);
    ```
    need to be changed so as not to include the value of `maxDataVolumesSupported` itself.
    Otherwise, when `maxDataVolumesSupported` has value `6` (for example), the method would
not ever return `6` when parameter `deviceId` is specified as `null` but would return `6`
when parameter `deviceId` is specified as `6` (assuming device id `6` is not already in use).
 Also, the error message would state "deviceId should be 1,2,4-6" whenever parameter `deviceId`
would be specified as an invalid value, which would not be correct (as `5` should be the highest
valid device id).


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