2022-02-09 13:34:03

by Haakon Bugge

Subject: [PATCH for-rc] IB/cma: Allow XRG INI QPs to set their local ACK timeout

XRC INI QPs should be able to adjust their local ACK timeout.

Fixes: 2c1619edef61 ("IB/cma: Define option to set ack timeout and pack tos_set")
Signed-off-by: Håkon Bugge <[email protected]>
Suggested-by: Avneesh Pant <[email protected]>

---

To avoid excessive discussions around the *if (WARN_ON( ...*
construct, just saying that it has been sanctioned by Jason here:

https://lore.kernel.org/linux-rdma/[email protected]/
---
drivers/infiniband/core/cma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 0f5f0d7..006ea9c 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -2811,7 +2811,7 @@ int rdma_set_ack_timeout(struct rdma_cm_id *id, u8 timeout)
{
struct rdma_id_private *id_priv;

- if (id->qp_type != IB_QPT_RC)
+ if (WARN_ON(id->qp_type != IB_QPT_RC && id->qp_type != IB_QPT_XRC_INI))
return -EINVAL;

id_priv = container_of(id, struct rdma_id_private, id);
--
1.8.3.1

2022-02-09 15:37:55

by Leon Romanovsky

Subject: Re: [PATCH for-rc] IB/cma: Allow XRG INI QPs to set their local ACK timeout

On Wed, Feb 09, 2022 at 02:23:00PM +0100, H?kon Bugge wrote:
> XRC INI QPs should be able to adjust their local ACK timeout.
>
> Fixes: 2c1619edef61 ("IB/cma: Define option to set ack timeout and pack tos_set")
> Signed-off-by: H?kon Bugge <[email protected]>
> Suggested-by: Avneesh Pant <[email protected]>
>
> ---
>
> To avoid excessive discussions around the *if (WARN_ON( ...*
> construct, just saying that it has been sanctioned by Jason here:
>
> https://lore.kernel.org/linux-rdma/[email protected]/

And I think that this is wrong, because it cane be triggered by user.
1. Create cm_id with any QP type you want - ucma_create_id()
2. Call to set option - ucma_set_option()
3. See WARN_ON.

Thanks

> ---
> drivers/infiniband/core/cma.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
> index 0f5f0d7..006ea9c 100644
> --- a/drivers/infiniband/core/cma.c
> +++ b/drivers/infiniband/core/cma.c
> @@ -2811,7 +2811,7 @@ int rdma_set_ack_timeout(struct rdma_cm_id *id, u8 timeout)
> {
> struct rdma_id_private *id_priv;
>
> - if (id->qp_type != IB_QPT_RC)
> + if (WARN_ON(id->qp_type != IB_QPT_RC && id->qp_type != IB_QPT_XRC_INI))
> return -EINVAL;
>
> id_priv = container_of(id, struct rdma_id_private, id);
> --
> 1.8.3.1
>

2022-02-09 16:38:32

by Haakon Bugge

Subject: Re: [PATCH for-rc] IB/cma: Allow XRG INI QPs to set their local ACK timeout

> On 9 Feb 2022, at 16:04, Leon Romanovsky <[email protected]> wrote:
>
> On Wed, Feb 09, 2022 at 02:23:00PM +0100, Håkon Bugge wrote:
>> XRC INI QPs should be able to adjust their local ACK timeout.
>>
>> Fixes: 2c1619edef61 ("IB/cma: Define option to set ack timeout and pack tos_set")
>> Signed-off-by: Håkon Bugge <[email protected]>
>> Suggested-by: Avneesh Pant <[email protected]>
>>
>> ---
>>
>> To avoid excessive discussions around the *if (WARN_ON( ...*
>> construct, just saying that it has been sanctioned by Jason here:
>>
>> https://lore.kernel.org/linux-rdma/[email protected]/
>
> And I think that this is wrong, because it cane be triggered by user.
> 1. Create cm_id with any QP type you want - ucma_create_id()
> 2. Call to set option - ucma_set_option()
> 3. See WARN_ON.

Yes, this one is callable from user-space. Right. Will send a v2.


Thxs, Håkon

>
> Thanks
>
>> ---
>> drivers/infiniband/core/cma.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
>> index 0f5f0d7..006ea9c 100644
>> --- a/drivers/infiniband/core/cma.c
>> +++ b/drivers/infiniband/core/cma.c
>> @@ -2811,7 +2811,7 @@ int rdma_set_ack_timeout(struct rdma_cm_id *id, u8 timeout)
>> {
>> struct rdma_id_private *id_priv;
>>
>> - if (id->qp_type != IB_QPT_RC)
>> + if (WARN_ON(id->qp_type != IB_QPT_RC && id->qp_type != IB_QPT_XRC_INI))
>> return -EINVAL;
>>
>> id_priv = container_of(id, struct rdma_id_private, id);
>> --
>> 1.8.3.1