[PATCH rdma-next 02/16] IB/uverbs: Expose max_counter_sets capability

Yishai Hadas
2017-10-19T14:41:44Z

From: Raed Salem <raeds-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>

max_counter_sets represents the number of different counter sets
exposed from the device.
A valid counter set id must be in range of [0, max_counter_sets - 1],
it will be used with counter set verbs in downstream patches in
this series.

Signed-off-by: Raed Salem <raeds-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Reviewed-by: Yishai Hadas <yishaih-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
---
drivers/infiniband/core/uverbs_cmd.c | 8 ++++++++
include/uapi/rdma/ib_user_verbs.h | 2 ++
2 files changed, 10 insertions(+)

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index ce969cc..9c6b795 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -3861,6 +3861,14 @@ int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
resp.cq_moderation_caps.max_cq_moderation_period =
attr.cq_caps.max_cq_moderation_period;
resp.response_length += sizeof(resp.cq_moderation_caps);
+
+ if (ucore->outlen < resp.response_length +
+ sizeof(resp.max_counter_sets) + sizeof(resp.reserved))
+ goto end;
+
+ resp.max_counter_sets = attr.max_counter_sets;
+ resp.response_length += sizeof(resp.max_counter_sets) +
+ sizeof(resp.reserved);
end:
err = ib_copy_to_udata(ucore, &resp, resp.response_length);
return err;
diff --git a/include/uapi/rdma/ib_user_verbs.h b/include/uapi/rdma/ib_user_verbs.h
index 7745a0e..b3f952c 100644
--- a/include/uapi/rdma/ib_user_verbs.h
+++ b/include/uapi/rdma/ib_user_verbs.h
@@ -270,6 +270,8 @@ struct ib_uverbs_ex_query_device_resp {
__u32 raw_packet_caps;
struct ib_uverbs_tm_caps tm_caps;
struct ib_uverbs_cq_caps cq_moderation_caps;
+ __u16 max_counter_sets;
+ __u8 reserved[6];
};

struct ib_uverbs_query_port {
--
1.8.3.1