6 * Author: Eric Biederman <ebiederm@xmission.com>
8 * proc net directory handling functions
11 #include <asm/uaccess.h>
13 #include <linux/errno.h>
14 #include <linux/time.h>
15 #include <linux/proc_fs.h>
16 #include <linux/stat.h>
17 #include <linux/init.h>
18 #include <linux/sched.h>
19 #include <linux/module.h>
20 #include <linux/bitops.h>
21 #include <linux/smp_lock.h>
22 #include <linux/mount.h>
23 #include <linux/nsproxy.h>
24 #include <net/net_namespace.h>
25 #include <linux/seq_file.h>
30 int seq_open_net(struct inode
*ino
, struct file
*f
,
31 const struct seq_operations
*ops
, int size
)
34 struct seq_net_private
*p
;
36 BUG_ON(size
< sizeof(*p
));
38 net
= get_proc_net(ino
);
42 p
= __seq_open_private(f
, ops
, size
);
50 EXPORT_SYMBOL_GPL(seq_open_net
);
52 int seq_release_net(struct inode
*ino
, struct file
*f
)
55 struct seq_net_private
*p
;
57 seq
= f
->private_data
;
61 seq_release_private(ino
, f
);
64 EXPORT_SYMBOL_GPL(seq_release_net
);
67 struct proc_dir_entry
*proc_net_fops_create(struct net
*net
,
68 const char *name
, mode_t mode
, const struct file_operations
*fops
)
70 return proc_create(name
, mode
, net
->proc_net
, fops
);
72 EXPORT_SYMBOL_GPL(proc_net_fops_create
);
74 void proc_net_remove(struct net
*net
, const char *name
)
76 remove_proc_entry(name
, net
->proc_net
);
78 EXPORT_SYMBOL_GPL(proc_net_remove
);
80 struct net
*get_proc_net(const struct inode
*inode
)
82 return maybe_get_net(PDE_NET(PDE(inode
)));
84 EXPORT_SYMBOL_GPL(get_proc_net
);
86 static struct proc_dir_entry
*shadow_pde
;
88 static struct proc_dir_entry
*proc_net_shadow(struct task_struct
*task
,
89 struct proc_dir_entry
*de
)
91 return task
->nsproxy
->net_ns
->proc_net
;
94 struct proc_dir_entry
*proc_net_mkdir(struct net
*net
, const char *name
,
95 struct proc_dir_entry
*parent
)
97 struct proc_dir_entry
*pde
;
98 pde
= proc_mkdir_mode(name
, S_IRUGO
| S_IXUGO
, parent
);
103 EXPORT_SYMBOL_GPL(proc_net_mkdir
);
105 static __net_init
int proc_net_ns_init(struct net
*net
)
107 struct proc_dir_entry
*root
, *netd
, *net_statd
;
111 root
= kzalloc(sizeof(*root
), GFP_KERNEL
);
116 netd
= proc_net_mkdir(net
, "net", root
);
121 net_statd
= proc_net_mkdir(net
, "stat", netd
);
127 net
->proc_net_root
= root
;
128 net
->proc_net
= netd
;
129 net
->proc_net_stat
= net_statd
;
135 remove_proc_entry("net", root
);
141 static __net_exit
void proc_net_ns_exit(struct net
*net
)
143 remove_proc_entry("stat", net
->proc_net
);
144 remove_proc_entry("net", net
->proc_net_root
);
145 kfree(net
->proc_net_root
);
148 static struct pernet_operations __net_initdata proc_net_ns_ops
= {
149 .init
= proc_net_ns_init
,
150 .exit
= proc_net_ns_exit
,
153 int __init
proc_net_init(void)
155 shadow_pde
= proc_mkdir("net", NULL
);
156 shadow_pde
->shadow_proc
= proc_net_shadow
;
158 return register_pernet_subsys(&proc_net_ns_ops
);