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IB/uverbs: Expose UAPI to query ucontext 

Expose UAPI to query ucontext, this will let user space application that
didn't allocate the ucontext but has access to by owning the matching
command FD to retrieve the ucontext information.

Link: https://lore.kernel.org/r/20200630093916.332097-4-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Yishai Hadas 2020-06-30 12:39:12 +03:00 committed by Jason Gunthorpe
parent 04c0a5fcfc
commit 1c8fb1ea5a
4 changed files with 51 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/infiniband/core/device.c
View File

@ -2674,6 +2674,7 @@ void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
SET_DEVICE_OP(dev_ops, query_port);
SET_DEVICE_OP(dev_ops, query_qp);
SET_DEVICE_OP(dev_ops, query_srq);
SET_DEVICE_OP(dev_ops, query_ucontext);
SET_DEVICE_OP(dev_ops, rdma_netdev_get_params);
SET_DEVICE_OP(dev_ops, read_counters);
SET_DEVICE_OP(dev_ops, reg_dm_mr);

41
drivers/infiniband/core/uverbs_std_types_device.c
View File

@ -229,6 +229,37 @@ static int UVERBS_HANDLER(UVERBS_METHOD_GET_CONTEXT)(
return 0;
}
static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_CONTEXT)(
struct uverbs_attr_bundle *attrs)
{
u64 core_support = IB_UVERBS_CORE_SUPPORT_OPTIONAL_MR_ACCESS;
struct ib_ucontext *ucontext;
struct ib_device *ib_dev;
u32 num_comp;
int ret;
ucontext = ib_uverbs_get_ucontext(attrs);
if (IS_ERR(ucontext))
return PTR_ERR(ucontext);
ib_dev = ucontext->device;
if (!ib_dev->ops.query_ucontext)
return -EOPNOTSUPP;
num_comp = attrs->ufile->device->num_comp_vectors;
ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_CONTEXT_NUM_COMP_VECTORS,
&num_comp, sizeof(num_comp));
if (IS_UVERBS_COPY_ERR(ret))
return ret;
ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_CONTEXT_CORE_SUPPORT,
&core_support, sizeof(core_support));
if (IS_UVERBS_COPY_ERR(ret))
return ret;
return ucontext->device->ops.query_ucontext(ucontext, attrs);
}
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_GET_CONTEXT,
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_GET_CONTEXT_NUM_COMP_VECTORS,
@ -237,6 +268,13 @@ DECLARE_UVERBS_NAMED_METHOD(
UVERBS_ATTR_TYPE(u64), UA_OPTIONAL),
UVERBS_ATTR_UHW());
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_QUERY_CONTEXT,
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_CONTEXT_NUM_COMP_VECTORS,
UVERBS_ATTR_TYPE(u32), UA_OPTIONAL),
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_CONTEXT_CORE_SUPPORT,
UVERBS_ATTR_TYPE(u64), UA_OPTIONAL));
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_INFO_HANDLES,
/* Also includes any device specific object ids */
@ -260,7 +298,8 @@ DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE,
&UVERBS_METHOD(UVERBS_METHOD_GET_CONTEXT),
&UVERBS_METHOD(UVERBS_METHOD_INVOKE_WRITE),
&UVERBS_METHOD(UVERBS_METHOD_INFO_HANDLES),
&UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT));
&UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT),
&UVERBS_METHOD(UVERBS_METHOD_QUERY_CONTEXT));
const struct uapi_definition uverbs_def_obj_device[] = {
UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_DEVICE),

4
include/rdma/ib_verbs.h
View File

@ -2645,6 +2645,10 @@ struct ib_device_ops {
*/
int (*fill_stat_mr_entry)(struct sk_buff *msg, struct ib_mr *ibmr);
/* query driver for its ucontext properties */
int (*query_ucontext)(struct ib_ucontext *context,
struct uverbs_attr_bundle *attrs);
DECLARE_RDMA_OBJ_SIZE(ib_ah);
DECLARE_RDMA_OBJ_SIZE(ib_cq);
DECLARE_RDMA_OBJ_SIZE(ib_pd);

6
include/uapi/rdma/ib_user_ioctl_cmds.h
View File

@ -69,6 +69,7 @@ enum uverbs_methods_device {
UVERBS_METHOD_INFO_HANDLES,
UVERBS_METHOD_QUERY_PORT,
UVERBS_METHOD_GET_CONTEXT,
UVERBS_METHOD_QUERY_CONTEXT,
};
enum uverbs_attrs_invoke_write_cmd_attr_ids {
@ -87,6 +88,11 @@ enum uverbs_attrs_get_context_attr_ids {
UVERBS_ATTR_GET_CONTEXT_CORE_SUPPORT,
};
enum uverbs_attrs_query_context_attr_ids {
UVERBS_ATTR_QUERY_CONTEXT_NUM_COMP_VECTORS,
UVERBS_ATTR_QUERY_CONTEXT_CORE_SUPPORT,
};
enum uverbs_attrs_create_cq_cmd_attr_ids {
UVERBS_ATTR_CREATE_CQ_HANDLE,
UVERBS_ATTR_CREATE_CQ_CQE,