From 25a0ad85156a7b697d4340560fff0d25a3b19243 Mon Sep 17 00:00:00 2001 From: Steve Wise Date: Thu, 3 May 2018 08:40:49 -0700 Subject: [PATCH] RDMA/nldev: Add explicit pad attribute Add a specific RDMA_NLDEV_ATTR_PAD attribute to be used for 64b attribute padding. To preserve the ABI, make this attribute equal to RDMA_NLDEV_ATTR_UNSPEC, which has a value of 0, because that has been used up until now as the pad attribute. Change all the previous use of 0 as the pad with this new enum. Signed-off-by: Steve Wise Reviewed-by: Leon Romanovsky Signed-off-by: Doug Ledford --- drivers/infiniband/core/nldev.c | 26 +++++++++++++++----------- include/uapi/rdma/rdma_netlink.h | 3 +++ 2 files changed, 18 insertions(+), 11 deletions(-) diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c index eb567765f45c..6b0c1eb71ea0 100644 --- a/drivers/infiniband/core/nldev.c +++ b/drivers/infiniband/core/nldev.c @@ -122,7 +122,8 @@ static int fill_dev_info(struct sk_buff *msg, struct ib_device *device) BUILD_BUG_ON(sizeof(device->attrs.device_cap_flags) != sizeof(u64)); if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS, - device->attrs.device_cap_flags, 0)) + device->attrs.device_cap_flags, + RDMA_NLDEV_ATTR_PAD)) return -EMSGSIZE; ib_get_device_fw_str(device, fw); @@ -131,10 +132,12 @@ static int fill_dev_info(struct sk_buff *msg, struct ib_device *device) return -EMSGSIZE; if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_NODE_GUID, - be64_to_cpu(device->node_guid), 0)) + be64_to_cpu(device->node_guid), + RDMA_NLDEV_ATTR_PAD)) return -EMSGSIZE; if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SYS_IMAGE_GUID, - be64_to_cpu(device->attrs.sys_image_guid), 0)) + be64_to_cpu(device->attrs.sys_image_guid), + RDMA_NLDEV_ATTR_PAD)) return -EMSGSIZE; if (nla_put_u8(msg, RDMA_NLDEV_ATTR_DEV_NODE_TYPE, device->node_type)) return -EMSGSIZE; @@ -161,11 +164,11 @@ static int fill_port_info(struct sk_buff *msg, BUILD_BUG_ON(sizeof(attr.port_cap_flags) > sizeof(u64)); if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_CAP_FLAGS, - (u64)attr.port_cap_flags, 0)) + (u64)attr.port_cap_flags, RDMA_NLDEV_ATTR_PAD)) return -EMSGSIZE; if (rdma_protocol_ib(device, port) && nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_SUBNET_PREFIX, - attr.subnet_prefix, 0)) + attr.subnet_prefix, RDMA_NLDEV_ATTR_PAD)) return -EMSGSIZE; if (rdma_protocol_ib(device, port)) { if (nla_put_u32(msg, RDMA_NLDEV_ATTR_LID, attr.lid)) @@ -209,8 +212,8 @@ static int fill_res_info_entry(struct sk_buff *msg, if (nla_put_string(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME, name)) goto err; - if (nla_put_u64_64bit(msg, - RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR, curr, 0)) + if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR, curr, + RDMA_NLDEV_ATTR_PAD)) goto err; nla_nest_end(msg, entry_attr); @@ -409,7 +412,7 @@ static int fill_res_cq_entry(struct sk_buff *msg, struct netlink_callback *cb, if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQE, cq->cqe)) goto err; if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT, - atomic_read(&cq->usecnt), 0)) + atomic_read(&cq->usecnt), RDMA_NLDEV_ATTR_PAD)) goto err; /* Poll context is only valid for kernel CQs */ @@ -445,11 +448,12 @@ static int fill_res_mr_entry(struct sk_buff *msg, struct netlink_callback *cb, if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_LKEY, mr->lkey)) goto err; if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_IOVA, - mr->iova, 0)) + mr->iova, RDMA_NLDEV_ATTR_PAD)) goto err; } - if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_MRLEN, mr->length, 0)) + if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_MRLEN, mr->length, + RDMA_NLDEV_ATTR_PAD)) goto err; if (fill_res_name_pid(msg, res)) @@ -484,7 +488,7 @@ static int fill_res_pd_entry(struct sk_buff *msg, struct netlink_callback *cb, goto err; } if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT, - atomic_read(&pd->usecnt), 0)) + atomic_read(&pd->usecnt), RDMA_NLDEV_ATTR_PAD)) goto err; if ((pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY) && nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_UNSAFE_GLOBAL_RKEY, diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h index 0ce0943fc808..fbf99aa8a03c 100644 --- a/include/uapi/rdma/rdma_netlink.h +++ b/include/uapi/rdma/rdma_netlink.h @@ -253,6 +253,9 @@ enum rdma_nldev_attr { /* don't change the order or add anything between, this is ABI! */ RDMA_NLDEV_ATTR_UNSPEC, + /* Pad attribute for 64b alignment */ + RDMA_NLDEV_ATTR_PAD = RDMA_NLDEV_ATTR_UNSPEC, + /* Identifier for ib_device */ RDMA_NLDEV_ATTR_DEV_INDEX, /* u32 */ -- 2.30.2