drivers/target/iscsi/iscsi_target_login.c

Source file repositories/reference/linux-study-clean/drivers/target/iscsi/iscsi_target_login.c

File Facts

System
Linux kernel
Corpus path
drivers/target/iscsi/iscsi_target_login.c
Extension
.c
Size
37535 bytes
Lines
1379
Domain
Driver Families
Bucket
drivers/target
Inferred role
Driver Families: exported/initcall integration point
Status
integration 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

ret = sock_create(sockaddr->ss_family, np->np_sock_type,
			np->np_ip_proto, &sock);
	if (ret < 0) {
		pr_err("sock_create() failed.\n");
		return ret;
	}
	np->np_socket = sock;
	/*
	 * Setup the np->np_sockaddr from the passed sockaddr setup
	 * in iscsi_target_configfs.c code..
	 */
	memcpy(&np->np_sockaddr, sockaddr,
			sizeof(struct sockaddr_storage));

	if (sockaddr->ss_family == AF_INET6)
		len = sizeof(struct sockaddr_in6);
	else
		len = sizeof(struct sockaddr_in);
	/*
	 * Set SO_REUSEADDR, and disable Nagle Algorithm with TCP_NODELAY.
	 */
	if (np->np_network_transport == ISCSI_TCP)
		tcp_sock_set_nodelay(sock->sk);
	sock_set_reuseaddr(sock->sk);
	ip_sock_set_freebind(sock->sk);

	ret = kernel_bind(sock, (struct sockaddr_unsized *)&np->np_sockaddr, len);
	if (ret < 0) {
		pr_err("kernel_bind() failed: %d\n", ret);
		goto fail;
	}

	ret = kernel_listen(sock, backlog);
	if (ret != 0) {
		pr_err("kernel_listen() failed: %d\n", ret);
		goto fail;
	}

	return 0;
fail:
	np->np_socket = NULL;
	sock_release(sock);
	return ret;
}

int iscsi_target_setup_login_socket(
	struct iscsi_np *np,
	struct sockaddr_storage *sockaddr)
{
	struct iscsit_transport *t;
	int rc;

	t = iscsit_get_transport(np->np_network_transport);
	if (!t)
		return -EINVAL;

	rc = t->iscsit_setup_np(np, sockaddr);
	if (rc < 0) {
		iscsit_put_transport(t);
		return rc;
	}

	np->np_transport = t;
	np->enabled = true;
	return 0;
}

int iscsit_accept_np(struct iscsi_np *np, struct iscsit_conn *conn)
{
	struct socket *new_sock, *sock = np->np_socket;
	struct sockaddr_in sock_in;
	struct sockaddr_in6 sock_in6;
	int rc;

	rc = kernel_accept(sock, &new_sock, 0);
	if (rc < 0)
		return rc;

	conn->sock = new_sock;
	conn->login_family = np->np_sockaddr.ss_family;

	if (np->np_sockaddr.ss_family == AF_INET6) {
		memset(&sock_in6, 0, sizeof(struct sockaddr_in6));

		rc = conn->sock->ops->getname(conn->sock,
				(struct sockaddr *)&sock_in6, 1);
		if (rc >= 0) {
			if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) {
				memcpy(&conn->login_sockaddr, &sock_in6, sizeof(sock_in6));
			} else {

Annotation

Implementation Notes