3  *  linux/fs/proc/net.c
9  *  proc net directory handling functions
27 #include <net/net_namespace.h>
32 static inline struct net *PDE_NET(struct proc_dir_entry *pde)  in PDE_NET()
37 static struct net *get_proc_net(const struct inode *inode)  in get_proc_net()
46 	struct net *net;  in seq_open_net()  local
53 	net = get_proc_net(inode);  in seq_open_net()
54 	if (!net)  in seq_open_net()
59 		put_net(net);  in seq_open_net()
63 	p->net = net;  in seq_open_net()
90 	p->net = get_net(current->nsproxy->net_ns);  in bpf_iter_init_seq_net()
100 	put_net(p->net);  in bpf_iter_fini_seq_net()
169 	struct net *net;  in single_open_net()  local
172 	net = get_proc_net(inode);  in single_open_net()
173 	if (!net)  in single_open_net()
176 	err = single_open(file, de->single_show, net);  in single_open_net()
178 		put_net(net);  in single_open_net()
257 static struct net *get_proc_task_net(struct inode *dir)  in get_proc_task_net()
261 	struct net *net = NULL;  in get_proc_task_net()  local
269 			net = get_net(ns->net_ns);  in get_proc_task_net()
274 	return net;  in get_proc_task_net()
281 	struct net *net;  in proc_tgid_net_lookup()  local
284 	net = get_proc_task_net(dir);  in proc_tgid_net_lookup()
285 	if (net != NULL) {  in proc_tgid_net_lookup()
286 		de = proc_lookup_de(dir, dentry, net->proc_net);  in proc_tgid_net_lookup()
287 		put_net(net);  in proc_tgid_net_lookup()
296 	struct net *net;  in proc_tgid_net_getattr()  local
298 	net = get_proc_task_net(inode);  in proc_tgid_net_getattr()
302 	if (net != NULL) {  in proc_tgid_net_getattr()
303 		stat->nlink = net->proc_net->nlink;  in proc_tgid_net_getattr()
304 		put_net(net);  in proc_tgid_net_getattr()
318 	struct net *net;  in proc_tgid_net_readdir()  local
321 	net = get_proc_task_net(file_inode(file));  in proc_tgid_net_readdir()
322 	if (net != NULL) {  in proc_tgid_net_readdir()
323 		ret = proc_readdir_de(file, ctx, net->proc_net);  in proc_tgid_net_readdir()
324 		put_net(net);  in proc_tgid_net_readdir()
335 static __net_init int proc_net_ns_init(struct net *net)  in proc_net_ns_init()  argument
348 	netd->data = net;  in proc_net_ns_init()
353 	memcpy(netd->name, "net", 4);  in proc_net_ns_init()
355 	uid = make_kuid(net->user_ns, 0);  in proc_net_ns_init()
359 	gid = make_kgid(net->user_ns, 0);  in proc_net_ns_init()
366 	net_statd = proc_net_mkdir(net, "stat", netd);  in proc_net_ns_init()
370 	net->proc_net = netd;  in proc_net_ns_init()
371 	net->proc_net_stat = net_statd;  in proc_net_ns_init()
380 static __net_exit void proc_net_ns_exit(struct net *net)  in proc_net_ns_exit()  argument
382 	remove_proc_entry("stat", net->proc_net);  in proc_net_ns_exit()
383 	pde_free(net->proc_net);  in proc_net_ns_exit()
393 	proc_symlink("net", NULL, "self/net");  in proc_net_init()