On 07/14/2015 10:11 AM, Kinglong Mee wrote:
> In vmware linux, the iscsi device contains more than one SCSI ID,
> and the second one's data length is zero.
>
> If there are two iSCSI devices with the second SCSI ID's data length
> is zero, the first iSCSI device will record with an invalid SCSI ID
> as zero length, the second one will be treat as the first one for
> the SCSI ID is zero length too.
>
> It means the only the first iSCSI device is exist in blkmapd's cache,
> the request for the second iSCSI device will failed as,
>
> "blkmapd: Could not find disk for device" and,
> "bl_resolve_deviceid failed to decode device: 2".
>
> v2, update comments
> v3, add a comment in the code
> v4, update comment as Christoph's suggestion
>
> Signed-off-by: Kinglong Mee <kinglongmee@xxxxxxxxx>
Committed...
steved.
> ---
> utils/blkmapd/device-inq.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/utils/blkmapd/device-inq.c b/utils/blkmapd/device-inq.c
> index 6b56b67..5c258bd 100644
> --- a/utils/blkmapd/device-inq.c
> +++ b/utils/blkmapd/device-inq.c
> @@ -198,6 +198,13 @@ struct bl_serial *bldev_read_serial(int fd, const char *filename)
> dev_id = (struct bl_dev_id *)&(dev_root->data[pos]);
> pos += (dev_id->len + devid_len);
>
> + /* Some buggy targets (e.g. VMWare) export zero length
> + * EVPD pages, skip them to not confuse the device id
> + * cache.
> + */
> + if (!dev_id->len)
> + continue;
> +
> if ((dev_id->ids & 0xf) < current_id)
> continue;
> switch (dev_id->ids & 0xf) {
>
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