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authorJason Gunthorpe <jgg@mellanox.com>2018-11-12 22:59:58 +0200
committerJason Gunthorpe <jgg@mellanox.com>2018-11-22 11:57:33 -0700
commita140692a52d2e12ba6a76dd042d556348e8bb55a (patch)
treed168281ba7eca4abde7746f7398d4d2187437a09 /include/rdma
parent1de751caf7d52debd9820dbcd0190c6306f3f7b0 (diff)
downloadlinux-a140692a52d2e12ba6a76dd042d556348e8bb55a.tar.bz2
RDMA/uverbs: Check for NULL driver methods for every write call
Add annotations to the uverbs_api structure indicating which driver methods are called by the implementation. If the required method is NULL the write API will be not be callable. This effectively duplicates the cmd_mask system, however it does it by expressing invariants required by the core code, not by delegating decision making to the driver. This is another step toward eliminating cmd_mask. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/uverbs_ioctl.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/rdma/uverbs_ioctl.h b/include/rdma/uverbs_ioctl.h
index 5df8ed79ba6c..963dd6b70cde 100644
--- a/include/rdma/uverbs_ioctl.h
+++ b/include/rdma/uverbs_ioctl.h
@@ -350,6 +350,7 @@ enum uapi_definition_kind {
enum uapi_definition_scope {
UAPI_SCOPE_OBJECT = 1,
+ UAPI_SCOPE_METHOD = 2,
};
struct uapi_definition {
@@ -422,6 +423,21 @@ struct uapi_definition {
sizeof(void *)), \
}
+/*
+ * Method is only supported if the function pointer named ibdev_fn in struct
+ * ib_device is not NULL.
+ */
+#define UAPI_DEF_METHOD_NEEDS_FN(ibdev_fn) \
+ { \
+ .kind = UAPI_DEF_IS_SUPPORTED_DEV_FN, \
+ .scope = UAPI_SCOPE_METHOD, \
+ .needs_fn_offset = \
+ offsetof(struct ib_device, ibdev_fn) + \
+ BUILD_BUG_ON_ZERO( \
+ sizeof(((struct ib_device *)0)->ibdev_fn) != \
+ sizeof(void *)), \
+ }
+
/* Call a function to determine if the entire object is supported or not */
#define UAPI_DEF_IS_OBJ_SUPPORTED(_func) \
{ \