IB/uverbs: Do not pass struct ib_device to the ioctl methods

This does the same as the patch before, except for ioctl. The rules are
the same, but for the ioctl methods the core code handles setting up the
uobject.

- Retrieve the ib_dev from the uobject->context->device. This is
  safe under ioctl as the core has already done rdma_alloc_begin_uobject
  and so CREATE calls are entirely protected by the rwsem.
- Retrieve the ib_dev from uobject->object
- Call ib_uverbs_get_ucontext()
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/uverbs_ioctl.c

@@ -354,7 +354,7 @@ static int uverbs_handle_method(struct ib_uverbs_attr __user *uattr_ptr,
 			goto cleanup;
 	}
 
-	ret = method_spec->handler(ibdev, ufile, attr_bundle);
+	ret = method_spec->handler(ufile, attr_bundle);
 
 	if (destroy_attr) {
 		uobj_put_destroy(destroy_attr->uobject);

drivers/infiniband/core/uverbs_std_types.c

@@ -210,8 +210,7 @@ static int uverbs_hot_unplug_completion_event_file(struct ib_uobject *uobj,
 	return 0;
 };
 
-int uverbs_destroy_def_handler(struct ib_device *ib_dev,
-			       struct ib_uverbs_file *file,
+int uverbs_destroy_def_handler(struct ib_uverbs_file *file,
 			       struct uverbs_attr_bundle *attrs)
 {
 	return 0;

drivers/infiniband/core/uverbs_std_types_counters.c

@@ -47,12 +47,13 @@ static int uverbs_free_counters(struct ib_uobject *uobject,
 	return counters->device->destroy_counters(counters);
 }
 
-static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_CREATE)(struct ib_device *ib_dev,
-							 struct ib_uverbs_file *file,
-							 struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_CREATE)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
+	struct ib_uobject *uobj = uverbs_attr_get_uobject(
+		attrs, UVERBS_ATTR_CREATE_COUNTERS_HANDLE);
+	struct ib_device *ib_dev = uobj->context->device;
 	struct ib_counters *counters;
-	struct ib_uobject *uobj;
 	int ret;
 
 	/*
@@ -63,7 +64,6 @@ static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_CREATE)(struct ib_device *ib_de
 	if (!ib_dev->create_counters)
 		return -EOPNOTSUPP;
 
-	uobj = uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_COUNTERS_HANDLE);
 	counters = ib_dev->create_counters(ib_dev, attrs);
 	if (IS_ERR(counters)) {
 		ret = PTR_ERR(counters);
@@ -81,9 +81,8 @@ static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_CREATE)(struct ib_device *ib_de
 	return ret;
 }
 
-static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_READ)(struct ib_device *ib_dev,
-						       struct ib_uverbs_file *file,
-						       struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_READ)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
 	struct ib_counters_read_attr read_attr = {};
 	const struct uverbs_attr *uattr;
@@ -91,7 +90,7 @@ static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_READ)(struct ib_device *ib_dev,
 		uverbs_attr_get_obj(attrs, UVERBS_ATTR_READ_COUNTERS_HANDLE);
 	int ret;
 
-	if (!ib_dev->read_counters)
+	if (!counters->device->read_counters)
 		return -EOPNOTSUPP;
 
 	if (!atomic_read(&counters->usecnt))
@@ -110,9 +109,7 @@ static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_READ)(struct ib_device *ib_dev,
 	if (!read_attr.counters_buff)
 		return -ENOMEM;
 
-	ret = ib_dev->read_counters(counters,
-				    &read_attr,
-				    attrs);
+	ret = counters->device->read_counters(counters, &read_attr, attrs);
 	if (ret)
 		goto err_read;
 

drivers/infiniband/core/uverbs_std_types_cq.c

@@ -57,11 +57,13 @@ static int uverbs_free_cq(struct ib_uobject *uobject,
 	return ret;
 }
 
-static int UVERBS_HANDLER(UVERBS_METHOD_CQ_CREATE)(struct ib_device *ib_dev,
-						   struct ib_uverbs_file *file,
-						   struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(UVERBS_METHOD_CQ_CREATE)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
-	struct ib_ucq_object           *obj;
+	struct ib_ucq_object *obj = container_of(
+		uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_CQ_HANDLE),
+		typeof(*obj), uobject);
+	struct ib_device *ib_dev = obj->uobject.context->device;
 	struct ib_udata uhw;
 	int ret;
 	u64 user_handle;
@@ -104,9 +106,6 @@ static int UVERBS_HANDLER(UVERBS_METHOD_CQ_CREATE)(struct ib_device *ib_dev,
 		goto err_event_file;
 	}
 
-	obj = container_of(uverbs_attr_get_uobject(attrs,
-						   UVERBS_ATTR_CREATE_CQ_HANDLE),
-			   typeof(*obj), uobject);
 	obj->comp_events_reported  = 0;
 	obj->async_events_reported = 0;
 	INIT_LIST_HEAD(&obj->comp_list);
@@ -173,9 +172,8 @@ DECLARE_UVERBS_NAMED_METHOD(
 			    UA_MANDATORY),
 	UVERBS_ATTR_UHW());
 
-static int UVERBS_HANDLER(UVERBS_METHOD_CQ_DESTROY)(struct ib_device *ib_dev,
-						    struct ib_uverbs_file *file,
-						    struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(UVERBS_METHOD_CQ_DESTROY)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
 	struct ib_uobject *uobj =
 		uverbs_attr_get_uobject(attrs, UVERBS_ATTR_DESTROY_CQ_HANDLE);

drivers/infiniband/core/uverbs_std_types_dm.c

@@ -46,12 +46,15 @@ static int uverbs_free_dm(struct ib_uobject *uobject,
 	return dm->device->dealloc_dm(dm);
 }
 
-static int UVERBS_HANDLER(UVERBS_METHOD_DM_ALLOC)(struct ib_device *ib_dev,
-						  struct ib_uverbs_file *file,
-						  struct uverbs_attr_bundle *attrs)
+static int
+UVERBS_HANDLER(UVERBS_METHOD_DM_ALLOC)(struct ib_uverbs_file *file,
+				       struct uverbs_attr_bundle *attrs)
 {
 	struct ib_dm_alloc_attr attr = {};
-	struct ib_uobject *uobj;
+	struct ib_uobject *uobj =
+		uverbs_attr_get(attrs, UVERBS_ATTR_ALLOC_DM_HANDLE)
+			->obj_attr.uobject;
+	struct ib_device *ib_dev = uobj->context->device;
 	struct ib_dm *dm;
 	int ret;
 
@@ -68,8 +71,6 @@ static int UVERBS_HANDLER(UVERBS_METHOD_DM_ALLOC)(struct ib_device *ib_dev,
 	if (ret)
 		return ret;
 
-	uobj = uverbs_attr_get(attrs, UVERBS_ATTR_ALLOC_DM_HANDLE)->obj_attr.uobject;
-
 	dm = ib_dev->alloc_dm(ib_dev, uobj->context, &attr, attrs);
 	if (IS_ERR(dm))
 		return PTR_ERR(dm);

drivers/infiniband/core/uverbs_std_types_flow_action.c

@@ -304,12 +304,13 @@ static int parse_flow_action_esp(struct ib_device *ib_dev,
 	return 0;
 }
 
-static int UVERBS_HANDLER(UVERBS_METHOD_FLOW_ACTION_ESP_CREATE)(struct ib_device *ib_dev,
-								struct ib_uverbs_file *file,
-								struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(UVERBS_METHOD_FLOW_ACTION_ESP_CREATE)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
+	struct ib_uobject *uobj = uverbs_attr_get_uobject(
+		attrs, UVERBS_ATTR_CREATE_FLOW_ACTION_ESP_HANDLE);
+	struct ib_device *ib_dev = uobj->context->device;
 	int				  ret;
-	struct ib_uobject		  *uobj;
 	struct ib_flow_action		  *action;
 	struct ib_flow_action_esp_attr	  esp_attr = {};
 
@@ -321,8 +322,6 @@ static int UVERBS_HANDLER(UVERBS_METHOD_FLOW_ACTION_ESP_CREATE)(struct ib_device
 		return ret;
 
 	/* No need to check as this attribute is marked as MANDATORY */
-	uobj = uverbs_attr_get_uobject(
-		attrs, UVERBS_ATTR_CREATE_FLOW_ACTION_ESP_HANDLE);
 	action = ib_dev->create_flow_action_esp(ib_dev, &esp_attr.hdr, attrs);
 	if (IS_ERR(action))
 		return PTR_ERR(action);
@@ -336,32 +335,28 @@ static int UVERBS_HANDLER(UVERBS_METHOD_FLOW_ACTION_ESP_CREATE)(struct ib_device
 	return 0;
 }
 
-static int UVERBS_HANDLER(UVERBS_METHOD_FLOW_ACTION_ESP_MODIFY)(struct ib_device *ib_dev,
-								struct ib_uverbs_file *file,
-								struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(UVERBS_METHOD_FLOW_ACTION_ESP_MODIFY)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
+	struct ib_uobject *uobj = uverbs_attr_get_uobject(
+		attrs, UVERBS_ATTR_MODIFY_FLOW_ACTION_ESP_HANDLE);
+	struct ib_flow_action *action = uobj->object;
 	int				  ret;
-	struct ib_uobject		  *uobj;
-	struct ib_flow_action		  *action;
 	struct ib_flow_action_esp_attr	  esp_attr = {};
 
-	if (!ib_dev->modify_flow_action_esp)
+	if (!action->device->modify_flow_action_esp)
 		return -EOPNOTSUPP;
 
-	ret = parse_flow_action_esp(ib_dev, file, attrs, &esp_attr, true);
+	ret = parse_flow_action_esp(action->device, file, attrs, &esp_attr,
+				    true);
 	if (ret)
 		return ret;
 
-	uobj = uverbs_attr_get_uobject(
-		attrs, UVERBS_ATTR_MODIFY_FLOW_ACTION_ESP_HANDLE);
-	action = uobj->object;
-
 	if (action->type != IB_FLOW_ACTION_ESP)
 		return -EINVAL;
 
-	return ib_dev->modify_flow_action_esp(action,
-					      &esp_attr.hdr,
-					      attrs);
+	return action->device->modify_flow_action_esp(action, &esp_attr.hdr,
+						      attrs);
 }
 
 static const struct uverbs_attr_spec uverbs_flow_action_esp_keymat[] = {

drivers/infiniband/core/uverbs_std_types_mr.c

@@ -39,14 +39,18 @@ static int uverbs_free_mr(struct ib_uobject *uobject,
 	return ib_dereg_mr((struct ib_mr *)uobject->object);
 }
 
-static int UVERBS_HANDLER(UVERBS_METHOD_DM_MR_REG)(struct ib_device *ib_dev,
-						   struct ib_uverbs_file *file,
-						   struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(UVERBS_METHOD_DM_MR_REG)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
 	struct ib_dm_mr_attr attr = {};
-	struct ib_uobject *uobj;
-	struct ib_dm *dm;
-	struct ib_pd *pd;
+	struct ib_uobject *uobj =
+		uverbs_attr_get_uobject(attrs, UVERBS_ATTR_REG_DM_MR_HANDLE);
+	struct ib_dm *dm =
+		uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_DM_HANDLE);
+	struct ib_pd *pd =
+		uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_PD_HANDLE);
+	struct ib_device *ib_dev = pd->device;
+
 	struct ib_mr *mr;
 	int ret;
 
@@ -75,12 +79,6 @@ static int UVERBS_HANDLER(UVERBS_METHOD_DM_MR_REG)(struct ib_device *ib_dev,
 	if (ret)
 		return ret;
 
-	pd = uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_PD_HANDLE);
-
-	dm = uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_DM_HANDLE);
-
-	uobj = uverbs_attr_get(attrs, UVERBS_ATTR_REG_DM_MR_HANDLE)->obj_attr.uobject;
-
 	if (attr.offset > dm->length || attr.length > dm->length ||
 	    attr.length > dm->length - attr.offset)
 		return -EINVAL;

drivers/infiniband/hw/mlx5/devx.c

@@ -409,11 +409,11 @@ static bool devx_is_general_cmd(void *in)
 	}
 }
 
-static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(struct ib_device *ib_dev,
-				  struct ib_uverbs_file *file,
-				  struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
-	struct mlx5_ib_dev *dev = to_mdev(ib_dev);
+	struct mlx5_ib_ucontext *c;
+	struct mlx5_ib_dev *dev;
 	int user_vector;
 	int dev_eqn;
 	unsigned int irqn;
@@ -423,6 +423,11 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(struct ib_device *ib_de
 			     MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC))
 		return -EFAULT;
 
+	c = devx_ufile2uctx(file);
+	if (IS_ERR(c))
+		return PTR_ERR(c);
+	dev = to_mdev(c->ibucontext.device);
+
 	err = mlx5_vector2eqn(dev->mdev, user_vector, &dev_eqn, &irqn);
 	if (err < 0)
 		return err;
@@ -454,9 +459,8 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(struct ib_device *ib_de
  * of the buggy user for execution (just insert it to the hardware schedule
  * queue or arm its CQ for event generation), no further harm is expected.
  */
-static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)(struct ib_device *ib_dev,
-				  struct ib_uverbs_file *file,
-				  struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
 	struct mlx5_ib_ucontext *c;
 	struct mlx5_ib_dev *dev;
@@ -483,9 +487,8 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_UAR)(struct ib_device *ib_de
 	return 0;
 }
 
-static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)(struct ib_device *ib_dev,
-				  struct ib_uverbs_file *file,
-				  struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OTHER)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
 	struct mlx5_ib_ucontext *c;
 	struct mlx5_ib_dev *dev;
@@ -712,9 +715,8 @@ static int devx_obj_cleanup(struct ib_uobject *uobject,
 	return ret;
 }
 
-static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(struct ib_device *ib_dev,
-				   struct ib_uverbs_file *file,
-				   struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
 	void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN);
 	int cmd_out_len =  uverbs_attr_get_len(attrs,
@@ -769,9 +771,8 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(struct ib_device *ib_d
 	return err;
 }
 
-static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)(struct ib_device *ib_dev,
-				   struct ib_uverbs_file *file,
-				   struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
 	void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN);
 	int cmd_out_len = uverbs_attr_get_len(attrs,
@@ -811,9 +812,8 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_MODIFY)(struct ib_device *ib_d
 	return err;
 }
 
-static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(struct ib_device *ib_dev,
-				   struct ib_uverbs_file *file,
-				   struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_QUERY)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
 	void *cmd_in = uverbs_attr_get_alloced_ptr(attrs, MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN);
 	int cmd_out_len = uverbs_attr_get_len(attrs,
@@ -931,9 +931,8 @@ static void devx_umem_reg_cmd_build(struct mlx5_ib_dev *dev,
 			     MLX5_IB_MTT_READ);
 }
 
-static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)(struct ib_device *ib_dev,
-				 struct ib_uverbs_file *file,
-				 struct uverbs_attr_bundle *attrs)
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_UMEM_REG)(
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
 	struct devx_umem_reg_cmd cmd;
 	struct devx_umem *obj;

drivers/infiniband/hw/mlx5/flow.c

@@ -39,8 +39,7 @@ static const struct uverbs_attr_spec mlx5_ib_flow_type[] = {
 };
 
 static int UVERBS_HANDLER(MLX5_IB_METHOD_CREATE_FLOW)(
-	struct ib_device *ib_dev, struct ib_uverbs_file *file,
-	struct uverbs_attr_bundle *attrs)
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
 	struct mlx5_ib_flow_handler *flow_handler;
 	struct mlx5_ib_flow_matcher *fs_matcher;
@@ -109,7 +108,7 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_CREATE_FLOW)(
 	if (IS_ERR(flow_handler))
 		return PTR_ERR(flow_handler);
 
-	ib_set_flow(uobj, &flow_handler->ibflow, qp, ib_dev);
+	ib_set_flow(uobj, &flow_handler->ibflow, qp, &dev->ib_dev);
 
 	return 0;
 }
@@ -129,8 +128,7 @@ static int flow_matcher_cleanup(struct ib_uobject *uobject,
 }
 
 static int UVERBS_HANDLER(MLX5_IB_METHOD_FLOW_MATCHER_CREATE)(
-	struct ib_device *ib_dev, struct ib_uverbs_file *file,
-	struct uverbs_attr_bundle *attrs)
+	struct ib_uverbs_file *file, struct uverbs_attr_bundle *attrs)
 {
 	struct ib_uobject *uobj = uverbs_attr_get_uobject(
 		attrs, MLX5_IB_ATTR_FLOW_MATCHER_CREATE_HANDLE);

include/rdma/ib_verbs.h

@@ -4170,7 +4170,6 @@ void rdma_roce_rescan_device(struct ib_device *ibdev);
 
 struct ib_ucontext *ib_uverbs_get_ucontext(struct ib_uverbs_file *ufile);
 
-int uverbs_destroy_def_handler(struct ib_device *ib_dev,
-			       struct ib_uverbs_file *file,
+int uverbs_destroy_def_handler(struct ib_uverbs_file *file,
 			       struct uverbs_attr_bundle *attrs);
 #endif /* IB_VERBS_H */

include/rdma/uverbs_ioctl.h

@@ -128,7 +128,7 @@ struct uverbs_method_spec {
 	u32						flags;
 	size_t						num_buckets;
 	size_t						num_child_attrs;
-	int (*handler)(struct ib_device *ib_dev, struct ib_uverbs_file *ufile,
+	int (*handler)(struct ib_uverbs_file *ufile,
 		       struct uverbs_attr_bundle *ctx);
 	struct uverbs_attr_spec_hash		*attr_buckets[0];
 };
@@ -171,7 +171,7 @@ struct uverbs_method_def {
 	u32				     flags;
 	size_t				     num_attrs;
 	const struct uverbs_attr_def * const (*attrs)[];
-	int (*handler)(struct ib_device *ib_dev, struct ib_uverbs_file *ufile,
+	int (*handler)(struct ib_uverbs_file *ufile,
 		       struct uverbs_attr_bundle *ctx);
 };