From: Jason Gunthorpe Date: Wed, 4 Jul 2018 05:50:30 +0000 (+0300) Subject: RDMA/uverbs: Use UVERBS_ATTR_MIN_SIZE correctly and uniformly X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=540cd69209682a351ab76b83b85ea856b8192720;p=linux.git RDMA/uverbs: Use UVERBS_ATTR_MIN_SIZE correctly and uniformly This newer macro allows specifying a lower bound on the accepted size, and has an 'unlimited' upper bound. Due to this it never checks for trailing zeroing so it doesn't make any sense to combine it with MIN_SZ_OR_ZERO, so drop MIN_SZ_OR_ZERO when they are used together There were a couple of places that open coded this pattern, switch them to use the clearer UVERBS_ATTR_MIN_SIZE for clarity. Signed-off-by: Jason Gunthorpe Signed-off-by: Leon Romanovsky --- diff --git a/drivers/infiniband/core/uverbs_std_types_counters.c b/drivers/infiniband/core/uverbs_std_types_counters.c index 202e3782e740f..dfe59ad721f63 100644 --- a/drivers/infiniband/core/uverbs_std_types_counters.c +++ b/drivers/infiniband/core/uverbs_std_types_counters.c @@ -138,7 +138,6 @@ DECLARE_UVERBS_NAMED_METHOD_DESTROY( UVERBS_ACCESS_DESTROY, UA_MANDATORY)); -#define MAX_COUNTERS_BUFF_SIZE USHRT_MAX DECLARE_UVERBS_NAMED_METHOD( UVERBS_METHOD_COUNTERS_READ, UVERBS_ATTR_IDR(UVERBS_ATTR_READ_COUNTERS_HANDLE, @@ -146,7 +145,7 @@ DECLARE_UVERBS_NAMED_METHOD( UVERBS_ACCESS_READ, UA_MANDATORY), UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_READ_COUNTERS_BUFF, - UVERBS_ATTR_SIZE(0, MAX_COUNTERS_BUFF_SIZE), + UVERBS_ATTR_MIN_SIZE(0), UA_MANDATORY), UVERBS_ATTR_PTR_IN(UVERBS_ATTR_READ_COUNTERS_FLAGS, UVERBS_ATTR_TYPE(__u32), diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c index be44e7e837ebc..192844bf60162 100644 --- a/drivers/infiniband/hw/mlx5/devx.c +++ b/drivers/infiniband/hw/mlx5/devx.c @@ -1034,13 +1034,11 @@ DECLARE_UVERBS_NAMED_METHOD( MLX5_IB_ATTR_DEVX_OTHER_CMD_IN, UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)), UA_MANDATORY, - UA_MIN_SZ_OR_ZERO, UA_ALLOC_AND_COPY), UVERBS_ATTR_PTR_OUT( MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT, UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)), - UA_MANDATORY, - UA_MIN_SZ_OR_ZERO)); + UA_MANDATORY)); DECLARE_UVERBS_NAMED_METHOD( MLX5_IB_METHOD_DEVX_OBJ_CREATE, @@ -1052,13 +1050,11 @@ DECLARE_UVERBS_NAMED_METHOD( MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN, UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)), UA_MANDATORY, - UA_MIN_SZ_OR_ZERO, UA_ALLOC_AND_COPY), UVERBS_ATTR_PTR_OUT( MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT, UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)), - UA_MANDATORY, - UA_MIN_SZ_OR_ZERO)); + UA_MANDATORY)); DECLARE_UVERBS_NAMED_METHOD( MLX5_IB_METHOD_DEVX_OBJ_DESTROY, @@ -1077,13 +1073,11 @@ DECLARE_UVERBS_NAMED_METHOD( MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN, UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)), UA_MANDATORY, - UA_MIN_SZ_OR_ZERO, UA_ALLOC_AND_COPY), UVERBS_ATTR_PTR_OUT( MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT, UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)), - UA_MANDATORY, - UA_MIN_SZ_OR_ZERO)); + UA_MANDATORY)); DECLARE_UVERBS_NAMED_METHOD( MLX5_IB_METHOD_DEVX_OBJ_QUERY, @@ -1095,13 +1089,11 @@ DECLARE_UVERBS_NAMED_METHOD( MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN, UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_in_cmd_hdr)), UA_MANDATORY, - UA_MIN_SZ_OR_ZERO, UA_ALLOC_AND_COPY), UVERBS_ATTR_PTR_OUT( MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT, UVERBS_ATTR_MIN_SIZE(MLX5_ST_SZ_BYTES(general_obj_out_cmd_hdr)), - UA_MANDATORY, - UA_MIN_SZ_OR_ZERO)); + UA_MANDATORY)); DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX, &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER), diff --git a/include/rdma/uverbs_ioctl.h b/include/rdma/uverbs_ioctl.h index 6073fd9d9c49c..0b46ef8f0b4c5 100644 --- a/include/rdma/uverbs_ioctl.h +++ b/include/rdma/uverbs_ioctl.h @@ -207,8 +207,11 @@ struct uverbs_object_tree_def { .u.ptr.min_len = ((uintptr_t)(&((_type *)0)->_last + 1)), .u.ptr.len = sizeof(_type) #define UVERBS_ATTR_SIZE(_min_len, _len) \ .u.ptr.min_len = _min_len, .u.ptr.len = _len -#define UVERBS_ATTR_MIN_SIZE(_min_len) \ - UVERBS_ATTR_SIZE(_min_len, USHRT_MAX) +/* + * Specifies at least min_len bytes must be passed in, but the amount can be + * larger, up to the protocol maximum size. No check for zeroing is done. + */ +#define UVERBS_ATTR_MIN_SIZE(_min_len) UVERBS_ATTR_SIZE(_min_len, USHRT_MAX) /* Must be used in the '...' of any UVERBS_ATTR */ #define UA_ALLOC_AND_COPY .alloc_and_copy = 1 @@ -265,13 +268,11 @@ struct uverbs_object_tree_def { */ #define UVERBS_ATTR_UHW() \ UVERBS_ATTR_PTR_IN(UVERBS_ATTR_UHW_IN, \ - UVERBS_ATTR_SIZE(0, USHRT_MAX), \ - UA_OPTIONAL, \ - UA_MIN_SZ_OR_ZERO), \ + UVERBS_ATTR_MIN_SIZE(0), \ + UA_OPTIONAL), \ UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_UHW_OUT, \ - UVERBS_ATTR_SIZE(0, USHRT_MAX), \ - UA_OPTIONAL, \ - UA_MIN_SZ_OR_ZERO), \ + UVERBS_ATTR_MIN_SIZE(0), \ + UA_OPTIONAL) /* * =======================================