drivers/infiniband/core/iwpm_msg.c

Source file repositories/reference/linux-study-clean/drivers/infiniband/core/iwpm_msg.c

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/core/iwpm_msg.c
Extension
.c
Size
28680 bytes
Lines
847
Domain
Driver Families
Bucket
drivers/infiniband
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

iwpm_compare_sockaddr(remote_sockaddr, &pm_msg->rem_addr)) {
		pr_info("%s: Incorrect local sockaddr\n", __func__);
		nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
		goto query_mapping_response_exit;
	}
	if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family ||
		mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) {
		pr_info("%s: Sockaddr family doesn't match the requested one\n",
				__func__);
		nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
		goto query_mapping_response_exit;
	}
	memcpy(&pm_msg->mapped_loc_addr, mapped_loc_sockaddr,
			sizeof(*mapped_loc_sockaddr));
	memcpy(&pm_msg->mapped_rem_addr, mapped_rem_sockaddr,
			sizeof(*mapped_rem_sockaddr));

	iwpm_print_sockaddr(&pm_msg->loc_addr,
			"query_mapping: Local sockaddr:");
	iwpm_print_sockaddr(&pm_msg->mapped_loc_addr,
			"query_mapping: Mapped local sockaddr:");
	iwpm_print_sockaddr(&pm_msg->rem_addr,
			"query_mapping: Remote sockaddr:");
	iwpm_print_sockaddr(&pm_msg->mapped_rem_addr,
			"query_mapping: Mapped remote sockaddr:");
query_mapping_response_exit:
	nlmsg_request->request_done = 1;
	/* always for found request */
	kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
	barrier();
	up(&nlmsg_request->sem);
	return 0;
}

/**
 * iwpm_remote_info_cb - Process remote connecting peer address info, which
 *                       the port mapper has received from the connecting peer
 * @skb: The socket buffer
 * @cb: Contains the received message (payload and netlink header)
 *
 * Stores the IPv4/IPv6 address info in a hash table
 */
int iwpm_remote_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX];
	struct sockaddr_storage *local_sockaddr, *remote_sockaddr;
	struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr;
	struct iwpm_remote_info *rem_info;
	const char *msg_type;
	u8 nl_client;
	int ret = -EINVAL;

	msg_type = "Remote Mapping info";
	if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX,
				resp_query_policy, nltb, msg_type))
		return ret;

	nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
	atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);

	local_sockaddr = (struct sockaddr_storage *)
			nla_data(nltb[IWPM_NLA_RQUERY_LOCAL_ADDR]);
	remote_sockaddr = (struct sockaddr_storage *)
			nla_data(nltb[IWPM_NLA_RQUERY_REMOTE_ADDR]);
	mapped_loc_sockaddr = (struct sockaddr_storage *)
			nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
	mapped_rem_sockaddr = (struct sockaddr_storage *)
			nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]);

	if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family ||
		mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) {
		pr_info("%s: Sockaddr family doesn't match the requested one\n",
				__func__);
		return ret;
	}
	rem_info = kzalloc_obj(struct iwpm_remote_info, GFP_ATOMIC);
	if (!rem_info) {
		ret = -ENOMEM;
		return ret;
	}
	memcpy(&rem_info->mapped_loc_sockaddr, mapped_loc_sockaddr,
	       sizeof(struct sockaddr_storage));
	memcpy(&rem_info->remote_sockaddr, remote_sockaddr,
	       sizeof(struct sockaddr_storage));
	memcpy(&rem_info->mapped_rem_sockaddr, mapped_rem_sockaddr,
	       sizeof(struct sockaddr_storage));
	rem_info->nl_client = nl_client;

	iwpm_add_remote_info(rem_info);

Annotation

Implementation Notes