Re: which kernel version support object-map feature from rbd kernel client

[TYLin <wooertim@xxxxxxxxx>]

You can check linux source code to see the feature supported by kernel client.

e.g. linux 4.13-rc5 (https://github.com/torvalds/linux/blob/v4.13-rc5/drivers/block/rbd.c)

in drivers/block/rbd.c:

/* Feature bits */

#define RBD_FEATURE_LAYERING (1ULL<<0)

#define RBD_FEATURE_STRIPINGV2 (1ULL<<1)

#define RBD_FEATURE_EXCLUSIVE_LOCK (1ULL<<2)

#define RBD_FEATURE_DATA_POOL (1ULL<<7)

#define RBD_FEATURES_ALL (RBD_FEATURE_LAYERING | \

RBD_FEATURE_STRIPINGV2 | \

RBD_FEATURE_EXCLUSIVE_LOCK | \

RBD_FEATURE_DATA_POOL)

So far only supports layering, striping, exclusive lock, data pool.

On Aug 15, 2017, at 9:34 PM, moftah moftah <mofta7y@xxxxxxxxx> wrote:

I dont think so ,

I tested with with kernel-4.10.17-1-pve which is proxmox5 kernel and that one didnt have object-map support

had to disable the feature from the rbd image in order for the krbd rbd module to deal with it and not complain about features

Thanks

On Tue, Aug 15, 2017 at 9:25 AM, David Turner <drakonstein@xxxxxxxxx> wrote:

I thought that object-map, introduced with Jewel, was included with the 4.9 kernel and every kernel since then.

On Tue, Aug 15, 2017, 7:26 AM Shinobu Kinjo <skinjo@xxxxxxxxxx> wrote:

It would be much better to explain why as of today, object-map feature
is not supported by the kernel client, or document it.

On Tue, Aug 15, 2017 at 8:08 PM, Ilya Dryomov <idryomov@xxxxxxxxx> wrote:
> On Tue, Aug 15, 2017 at 11:34 AM, moftah moftah <mofta7y@xxxxxxxxx> wrote:
>> Hi All,
>>
>> I have search everywhere for some sort of table that show kernel version to
>> what rbd image features supported and didnt find any.
>>
>> basically I am looking at latest kernels from kernel.org , and i am thinking
>> of upgrading to 4.12 since it is stable but i want to make sure i can get
>> rbd images with object-map features working with rbd.ko
>>
>> if anyone know please let me know what kernel version i have to upgrade to
>> to get that feature supported by kernel client
>
> As of today, object-map feature is not supported by the kernel client.
>
> Thanks,
>
>                 Ilya
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