From b4c598a67ea19c5784e542c03dd912a0ce36109a Mon Sep 17 00:00:00 2001 From: Leon Romanovsky Date: Tue, 20 Jun 2017 09:59:14 +0300 Subject: [PATCH] RDMA/netlink: Implement nldev device dumpit calback This patch adds the ability to return all available devices together with their properties. Signed-off-by: Leon Romanovsky Reviewed-by: Steve Wise --- drivers/infiniband/core/nldev.c | 64 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 63 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c index 1d1e4f2..4b8b0f5 100644 --- a/drivers/infiniband/core/nldev.c +++ b/drivers/infiniband/core/nldev.c @@ -30,13 +30,75 @@ * POSSIBILITY OF SUCH DAMAGE. */ +#include #include #include "core_priv.h" +static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = { + [RDMA_NLDEV_ATTR_DEV_INDEX] = { .type = NLA_U32 }, + [RDMA_NLDEV_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING, + .len = IB_DEVICE_NAME_MAX - 1}, + [RDMA_NLDEV_ATTR_PORT_INDEX] = { .type = NLA_U32 }, +}; + +static int fill_dev_info(struct sk_buff *msg, struct ib_device *device) +{ + if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index)) + return -EMSGSIZE; + if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME, device->name)) + return -EMSGSIZE; + if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, rdma_end_port(device))) + return -EMSGSIZE; + return 0; +} + +static int _nldev_get_dumpit(struct ib_device *device, + struct sk_buff *skb, + struct netlink_callback *cb, + unsigned int idx) +{ + int start = cb->args[0]; + struct nlmsghdr *nlh; + + if (idx < start) + return 0; + + nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, + RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET), + 0, NLM_F_MULTI); + + if (fill_dev_info(skb, device)) { + nlmsg_cancel(skb, nlh); + goto out; + } + + nlmsg_end(skb, nlh); + + idx++; + +out: cb->args[0] = idx; + return skb->len; +} + +static int nldev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) +{ + /* + * There is no need to take lock, because + * we are relying on ib_core's lists_rwsem + */ + return ib_enum_all_devs(_nldev_get_dumpit, skb, cb); +} + +static const struct rdma_nl_cbs nldev_cb_table[] = { + [RDMA_NLDEV_CMD_GET] = { + .dump = nldev_get_dumpit, + }, +}; + void __init nldev_init(void) { - rdma_nl_register(RDMA_NL_NLDEV, NULL); + rdma_nl_register(RDMA_NL_NLDEV, nldev_cb_table); } void __exit nldev_exit(void) -- 2.7.4