type &= SOCK_TYPE_MASK;if(SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;// 这里创建了 socket 结构体retval = sock_create(family, type, protocol, &sock);if(retval <0)gotoout;// 与文件系统进行关联retval = sock_map_fd(sock,...
}//__sys_socketsock_create(family, type, protocol, &sock); __sock_create(current->nsproxy->net_ns, family, type, protocol, res,0);//读 net_families[family]pf =rcu_dereference(net_families[family]); ... pf->create(net, sock, protocol, kern); inet_create//在inet_create中有下列代...
open("/dev/test1", O_RDONLY|O_LARGEFILE) = 5 ioctl(5, 0x80041272, 0xbfffe124) = -1 EINVAL (Invalid argument) write(2, "mkfs.jfs: can't determine device"..., ..._exit(1) = ? 清单6 显示 ioctl 调用导致用来格式化分区的 mkfs 程序失败。ioctl BLKGETSIZE64 失败。( BLKGET-SIZE64 ...
2、不同点在于调用的API不同,linux内核中调用的是sock_create_kern函数来创建socket,调用sock->ops->connect来连接服务端(PS:这里的sock是前面创建的socket连接符),调用kernel_sendmsg来发送信息,调用kernel_recvmsg来接收信息,调用kernel_sock_shutdown函数来关闭连接,调用sock_release函数来释放socket连接符,按照用户层...
用户态multipathd的check_path循环函数检测到该设备离线状态, 通过ioctl通知内核态, 内核态执行fail_path动作, 将路径标记为NULL IO流程中检查到当前路径为NULL时, 重新选择其他路径下发IO 多路径关键源码分析 代码语言:shell AI代码解释 内核超时检测流程 drivers/scsi/libiscsi.c static void iscsi_check_transport_...
2. netlink是一种异步通信机制,在内核与用户态应用之间传递的消息保存在socket缓存队列中,发送消息只是把消息保存在接收者的socket的接 收队列,而不需要等待接收者收到消息,但系统调用与 ioctl 则是同步通信机制,如果传递的数据太长,将影响调度粒度。 3.使用 netlink 的内核部分可以采用模块的方式实现,使用 netlink...
ioctl = udp_ioctl, .destroy = udp_destroy_sock, .setsockopt = udp_setsockopt, .getsockopt = udp_getsockopt, .sendmsg = udp_sendmsg, .recvmsg = udp_recvmsg, .sendpage = udp_sendpage, .backlog_rcv = __udp_queue_rcv_skb, .release_cb = ip4_datagram_release_cb, .hash = udp_lib_hash...
- netrom: Decrease sock refcount when sock timers expire - sctp: trim optlen when it's a huge value in sctp_setsockopt - net: sched: fix memory leak in tcindex_partial_destroy_work - KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak ...
A flaw use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blac...
System call and ioctl are simplex IPCs in the sense that a session for these IPCs can be initiated only by user-space applications. But, what if a kernel module has an urgent message for a user-space application? There is no way of doing that directly using these IPCs. Normally, applicat...