diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/rdma/uverbs_ioctl.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/rdma/uverbs_ioctl.h b/include/rdma/uverbs_ioctl.h index 505492443c36..a73016a977a1 100644 --- a/include/rdma/uverbs_ioctl.h +++ b/include/rdma/uverbs_ioctl.h @@ -1044,4 +1044,29 @@ uverbs_get_raw_fd(int *to, const struct uverbs_attr_bundle *attrs_bundle, _ib_copy_validate_udata_in(_udata, &(_req), sizeof(_req), \ offsetofend(typeof(_req), _end_member)) +int _ib_copy_validate_udata_cm_fail(struct ib_udata *udata, u64 req_cm, + u64 valid_cm); + +/** + * ib_copy_validate_udata_in_cm - Copy the req structure and check the comp_mask + * @_udata: The system calls ib_udata struct + * @_req: The name of an on-stack structure that holds the driver data + * @_end_member: The member in the struct that is the original end of struct + * from the first kernel to introduce it. + * @_valid_cm: A bitmask of bits permitted in the comp_mask_field. + * + * Check that the udata input request struct is properly formed for this kernel. + * Then copy it into req + */ +#define ib_copy_validate_udata_in_cm(_udata, _req, _end_member, _valid_cm) \ + ({ \ + typeof((_req).comp_mask) __valid_cm = _valid_cm; \ + int ret = \ + ib_copy_validate_udata_in(_udata, _req, _end_member); \ + if (!ret && ((_req).comp_mask & ~__valid_cm)) \ + ret = _ib_copy_validate_udata_cm_fail( \ + _udata, (_req).comp_mask, __valid_cm); \ + ret; \ + }) + #endif |