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IB/core: Simplify rdma cgroup registration 

RDMA cgroup registration routine always returns success, so simplify
function to be void and run clang formatter over whole CONFIG_CGROUP_RDMA
art of core_priv.h.

This reduces unwinding error path for regular registration and future net
namespace change functionality for rdma device.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Parav Pandit 2019-01-17 20:14:15 +02:00 committed by Jason Gunthorpe
parent 8ea175f005
commit 7527a7b157
5 changed files with 16 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/infiniband/core/cgroup.c
View File

@ -21,12 +21,11 @@
* Register with the rdma cgroup. Should be called before
* exposing rdma device to user space applications to avoid
* resource accounting leak.
* Returns 0 on success or otherwise failure code.
*/
int ib_device_register_rdmacg(struct ib_device *device)
void ib_device_register_rdmacg(struct ib_device *device)
{
device->cg_device.name = device->name;
return rdmacg_register_device(&device->cg_device);
rdmacg_register_device(&device->cg_device);
}
/**

17
drivers/infiniband/core/core_priv.h
View File

@ -115,7 +115,7 @@ void ib_cache_cleanup_one(struct ib_device *device);
void ib_cache_release_one(struct ib_device *device);
#ifdef CONFIG_CGROUP_RDMA
int ib_device_register_rdmacg(struct ib_device *device);
void ib_device_register_rdmacg(struct ib_device *device);
void ib_device_unregister_rdmacg(struct ib_device *device);
int ib_rdmacg_try_charge(struct ib_rdmacg_object *cg_obj,
@ -126,21 +126,26 @@ void ib_rdmacg_uncharge(struct ib_rdmacg_object *cg_obj,
struct ib_device *device,
enum rdmacg_resource_type resource_index);
#else
static inline int ib_device_register_rdmacg(struct ib_device *device)
{ return 0; }
static inline void ib_device_register_rdmacg(struct ib_device *device)
{
}
static inline void ib_device_unregister_rdmacg(struct ib_device *device)
{ }
{
}
static inline int ib_rdmacg_try_charge(struct ib_rdmacg_object *cg_obj,
struct ib_device *device,
enum rdmacg_resource_type resource_index)
{ return 0; }
{
return 0;
}
static inline void ib_rdmacg_uncharge(struct ib_rdmacg_object *cg_obj,
struct ib_device *device,
enum rdmacg_resource_type resource_index)
{ }
{
}
#endif
static inline bool rdma_is_upper_dev_rcu(struct net_device *dev,

8
drivers/infiniband/core/device.c
View File

@ -599,12 +599,7 @@ int ib_register_device(struct ib_device *device, const char *name)
device->index = __dev_new_index();
ret = ib_device_register_rdmacg(device);
if (ret) {
dev_warn(&device->dev,
"Couldn't register device with rdma cgroup\n");
goto dev_cleanup;
}
ib_device_register_rdmacg(device);
ret = ib_device_register_sysfs(device);
if (ret) {
@ -627,7 +622,6 @@ int ib_register_device(struct ib_device *device, const char *name)
cg_cleanup:
ib_device_unregister_rdmacg(device);
dev_cleanup:
cleanup_device(device);
out:
mutex_unlock(&device_mutex);

2
include/linux/cgroup_rdma.h
View File

@ -39,7 +39,7 @@ struct rdmacg_device {
* APIs for RDMA/IB stack to publish when a device wants to
* participate in resource accounting
*/
int rdmacg_register_device(struct rdmacg_device *device);
void rdmacg_register_device(struct rdmacg_device *device);
void rdmacg_unregister_device(struct rdmacg_device *device);
/* APIs for RDMA/IB stack to charge/uncharge pool specific resources */

5
kernel/cgroup/rdma.c
View File

@ -313,10 +313,8 @@ EXPORT_SYMBOL(rdmacg_try_charge);
* If IB stack wish a device to participate in rdma cgroup resource
* tracking, it must invoke this API to register with rdma cgroup before
* any user space application can start using the RDMA resources.
* Returns 0 on success or EINVAL when table length given is beyond
* supported size.
*/
int rdmacg_register_device(struct rdmacg_device *device)
void rdmacg_register_device(struct rdmacg_device *device)
{
INIT_LIST_HEAD(&device->dev_node);
INIT_LIST_HEAD(&device->rpools);
@ -324,7 +322,6 @@ int rdmacg_register_device(struct rdmacg_device *device)
mutex_lock(&rdmacg_mutex);
list_add_tail(&device->dev_node, &rdmacg_devices);
mutex_unlock(&rdmacg_mutex);
return 0;
}
EXPORT_SYMBOL(rdmacg_register_device);