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authorMatan Barak <matanb@mellanox.com>2018-06-17 12:59:53 +0300
committerJason Gunthorpe <jgg@mellanox.com>2018-06-19 10:53:02 -0600
commit2d9c1bd7e177bd8b460403db9513b0a223e46ab8 (patch)
treec14d68a71a2c971245b66fd6f8599b1ce04242cd /include/rdma
parent8762d149e88dea5bc09e0d7faa84b635807167ab (diff)
downloadlinux-2d9c1bd7e177bd8b460403db9513b0a223e46ab8.tar.bz2
IB/uverbs: Add a macro to define a type with no kernel known size
Sometimes the uverbs uAPI doesn't really care about the structure it gets from user-space. All it wants to do is to allocate enough space and send it to the hardware/provider driver. Adding a UVERBS_ATTR_MIN_SIZE that could be used for this scenarios. We use USHRT_MAX as the kernel known size to bypass any zero validations. Signed-off-by: Matan Barak <matanb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/uverbs_ioctl.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/rdma/uverbs_ioctl.h b/include/rdma/uverbs_ioctl.h
index 11cc40ef1cb6..970357d0ccc4 100644
--- a/include/rdma/uverbs_ioctl.h
+++ b/include/rdma/uverbs_ioctl.h
@@ -215,6 +215,8 @@ struct uverbs_object_tree_def {
.min_len = ((uintptr_t)(&((_type *)0)->_last + 1)), .len = sizeof(_type)
#define UVERBS_ATTR_SIZE(_min_len, _len) \
.min_len = _min_len, .len = _len
+#define UVERBS_ATTR_MIN_SIZE(_min_len) \
+ UVERBS_ATTR_SIZE(_min_len, USHRT_MAX)
/*
* In new compiler, UVERBS_ATTR could be simplified by declaring it as