sys-socket - linux 内核 socket 结构关系

sk_init_common

./net/ipv4/af_inet.c

socket

+ state : socket_state+ type : short+ flags : unsigned long+ wq : struct socket_wq+ file ：struct file*+ sk : struct sock*+ ops : const struct proto_ops *

kern_mount

tcp_v4_init_sock

Linux 5.0.1 sys-socket

./net/socket.c

proto_ops

static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly;

fd: current fd array

./fs/inode.c

new_inode_pseudo

sock_register

1

vfsmount

+ mnt_root : struct dentry *+ mnt_sb : struct super_block+ mnt_flags : int

kernel_init

4.1

./include/linux/fs.h

4.2

1.2

./net/ipv4/tcp.c

./include/linux/fdtable.h

sock_map_fd

sock

+ sk_wq : struct socket_wq*+ sk_protocol : unsigned int+ sk_type : unsigned int+ sk_rcvbuf : int+ sk_sndbuf : int+ sk_receive_queue : struct sk_buff_head+ sk_write_queue : struct sk_buff_head+ sk_state :  __sk_common.skc_state+ sk_family : __sk_common.skc_family+ sk_prot : __sk_common.skc_prot+ sk_prot_creator : struct proto\t\t*

socket_alloc

+ socket : struct socket+ vfs_inode : struct inode

sock_alloc_file

inet_init

sk_alloc

./init/main.c

wenfh2020.com

./include/linux/mount.h

static struct file_system_type sock_fs_type = {    .name = \"sockfs\

sock_alloc_inode

inode

+ i_op : const struct inode_operations

files_struct

+ count : atomic_t+ fdt : struct fdtable __rcu*+ next_fd : unsigned long

span style=\"font-size: inherit;\

./net/ipv4/tcp_ipv4.c

f_op = socket_file_ops

sock_init_data

file

+ f_path : struct path+ f_inode : struct inode *+ f_op : const struct file_operations *+ private_data : void *

1.1

net_proto_family

./include/linux/sched.h

./include/net/sock.h

sockfs_mount

4

./include/linux/net.h

3

fdtable

+ max_fds : unsigend int+ fd: struct file __rcu**

inet_protosw

+ list : struct list_head+ type : unsigned short+ protocol : unsigned short+ prot : struct proto+ ops : const struct proto_ops+ flags : unsigned char

proto

i_op = &sockfs_inode_ops

path

+ mnt : struct vfsmount*+ dentry : struct dentry

./net/core/sock.c

./include/linux/path.h

./include/linux/protocol.h

struct proto tcp_prot = { .name   = \"TCP\

fd_install

./include/sock.h

./include/linux/dcache.h

dentry

+ d_inode : struct inode

task_struct

+ files : struct files_struct *

file_system_type

+ name : const char*+ fs_flags : int+ (*kill_sb) (struct super_block *) : void

2

super_operations

tcp_init_sock

inet_create

sock_alloc

static struct vfsmount *sock_mnt __read_mostly;