Contributors: 34
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Pavel Emelyanov |
382 |
23.12% |
6 |
6.52% |
| Christoph Hellwig |
288 |
17.43% |
5 |
5.43% |
| David S. Miller |
202 |
12.23% |
1 |
1.09% |
| Denis V. Lunev |
142 |
8.60% |
6 |
6.52% |
| David Howells |
91 |
5.51% |
4 |
4.35% |
| Alexey Dobriyan |
77 |
4.66% |
10 |
10.87% |
| Eric W. Biedermann |
71 |
4.30% |
9 |
9.78% |
| Dmitry Torokhov |
68 |
4.12% |
1 |
1.09% |
| Yonghong Song |
65 |
3.93% |
2 |
2.17% |
| Eric Dumazet |
64 |
3.87% |
1 |
1.09% |
| Linus Torvalds (pre-git) |
59 |
3.57% |
10 |
10.87% |
| Wang Chen |
24 |
1.45% |
2 |
2.17% |
| Al Viro |
21 |
1.27% |
7 |
7.61% |
| Hideaki Yoshifuji / 吉藤英明 |
19 |
1.15% |
2 |
2.17% |
| Randy Dunlap |
15 |
0.91% |
1 |
1.09% |
| Linus Torvalds |
11 |
0.67% |
4 |
4.35% |
| Christian Brauner |
8 |
0.48% |
3 |
3.26% |
| Jean Tourrilhes |
6 |
0.36% |
1 |
1.09% |
| Nicolas Dichtel |
5 |
0.30% |
1 |
1.09% |
| Thomas Weißschuh |
5 |
0.30% |
1 |
1.09% |
| Chas Williams |
4 |
0.24% |
1 |
1.09% |
| Arnaldo Carvalho de Melo |
3 |
0.18% |
1 |
1.09% |
| Masahide Nakamura |
3 |
0.18% |
1 |
1.09% |
| Ingo Molnar |
3 |
0.18% |
1 |
1.09% |
| Miklos Szeredi |
3 |
0.18% |
1 |
1.09% |
| Adrian Bunk |
2 |
0.12% |
2 |
2.17% |
| Helge Deller |
2 |
0.12% |
1 |
1.09% |
| Jeff Layton |
2 |
0.12% |
1 |
1.09% |
| Daniel Lezcano |
2 |
0.12% |
1 |
1.09% |
| Thomas Gleixner |
1 |
0.06% |
1 |
1.09% |
| Song Muchun |
1 |
0.06% |
1 |
1.09% |
| Albert D. Cahalan |
1 |
0.06% |
1 |
1.09% |
| Li Yang |
1 |
0.06% |
1 |
1.09% |
| Trond Myklebust |
1 |
0.06% |
1 |
1.09% |
| Total |
1652 |
|
92 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/fs/proc/net.c
*
* Copyright (C) 2007
*
* Author: Eric Biederman <ebiederm@xmission.com>
*
* proc net directory handling functions
*/
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/sched/task.h>
#include <linux/module.h>
#include <linux/bitops.h>
#include <linux/mount.h>
#include <linux/nsproxy.h>
#include <linux/uidgid.h>
#include <net/net_namespace.h>
#include <linux/seq_file.h>
#include "internal.h"
static inline struct net *PDE_NET(struct proc_dir_entry *pde)
{
return pde->parent->data;
}
static struct net *get_proc_net(const struct inode *inode)
{
return maybe_get_net(PDE_NET(PDE(inode)));
}
static int seq_open_net(struct inode *inode, struct file *file)
{
unsigned int state_size = PDE(inode)->state_size;
struct seq_net_private *p;
struct net *net;
WARN_ON_ONCE(state_size < sizeof(*p));
if (file->f_mode & FMODE_WRITE && !PDE(inode)->write)
return -EACCES;
net = get_proc_net(inode);
if (!net)
return -ENXIO;
p = __seq_open_private(file, PDE(inode)->seq_ops, state_size);
if (!p) {
put_net(net);
return -ENOMEM;
}
#ifdef CONFIG_NET_NS
p->net = net;
netns_tracker_alloc(net, &p->ns_tracker, GFP_KERNEL);
#endif
return 0;
}
static void seq_file_net_put_net(struct seq_file *seq)
{
#ifdef CONFIG_NET_NS
struct seq_net_private *priv = seq->private;
put_net_track(priv->net, &priv->ns_tracker);
#else
put_net(&init_net);
#endif
}
static int seq_release_net(struct inode *ino, struct file *f)
{
struct seq_file *seq = f->private_data;
seq_file_net_put_net(seq);
seq_release_private(ino, f);
return 0;
}
static const struct proc_ops proc_net_seq_ops = {
.proc_open = seq_open_net,
.proc_read = seq_read,
.proc_write = proc_simple_write,
.proc_lseek = seq_lseek,
.proc_release = seq_release_net,
};
int bpf_iter_init_seq_net(void *priv_data, struct bpf_iter_aux_info *aux)
{
#ifdef CONFIG_NET_NS
struct seq_net_private *p = priv_data;
p->net = get_net_track(current->nsproxy->net_ns, &p->ns_tracker,
GFP_KERNEL);
#endif
return 0;
}
void bpf_iter_fini_seq_net(void *priv_data)
{
#ifdef CONFIG_NET_NS
struct seq_net_private *p = priv_data;
put_net_track(p->net, &p->ns_tracker);
#endif
}
struct proc_dir_entry *proc_create_net_data(const char *name, umode_t mode,
struct proc_dir_entry *parent, const struct seq_operations *ops,
unsigned int state_size, void *data)
{
struct proc_dir_entry *p;
p = proc_create_reg(name, mode, &parent, data);
if (!p)
return NULL;
pde_force_lookup(p);
p->proc_ops = &proc_net_seq_ops;
p->seq_ops = ops;
p->state_size = state_size;
return proc_register(parent, p);
}
EXPORT_SYMBOL_GPL(proc_create_net_data);
/**
* proc_create_net_data_write - Create a writable net_ns-specific proc file
* @name: The name of the file.
* @mode: The file's access mode.
* @parent: The parent directory in which to create.
* @ops: The seq_file ops with which to read the file.
* @write: The write method with which to 'modify' the file.
* @state_size: The size of the per-file private state to allocate.
* @data: Data for retrieval by pde_data().
*
* Create a network namespaced proc file in the @parent directory with the
* specified @name and @mode that allows reading of a file that displays a
* series of elements and also provides for the file accepting writes that have
* some arbitrary effect.
*
* The functions in the @ops table are used to iterate over items to be
* presented and extract the readable content using the seq_file interface.
*
* The @write function is called with the data copied into a kernel space
* scratch buffer and has a NUL appended for convenience. The buffer may be
* modified by the @write function. @write should return 0 on success.
*
* The @data value is accessible from the @show and @write functions by calling
* pde_data() on the file inode. The network namespace must be accessed by
* calling seq_file_net() on the seq_file struct.
*/
struct proc_dir_entry *proc_create_net_data_write(const char *name, umode_t mode,
struct proc_dir_entry *parent,
const struct seq_operations *ops,
proc_write_t write,
unsigned int state_size, void *data)
{
struct proc_dir_entry *p;
p = proc_create_reg(name, mode, &parent, data);
if (!p)
return NULL;
pde_force_lookup(p);
p->proc_ops = &proc_net_seq_ops;
p->seq_ops = ops;
p->state_size = state_size;
p->write = write;
return proc_register(parent, p);
}
EXPORT_SYMBOL_GPL(proc_create_net_data_write);
static int single_open_net(struct inode *inode, struct file *file)
{
struct proc_dir_entry *de = PDE(inode);
struct net *net;
int err;
net = get_proc_net(inode);
if (!net)
return -ENXIO;
err = single_open(file, de->single_show, net);
if (err)
put_net(net);
return err;
}
static int single_release_net(struct inode *ino, struct file *f)
{
struct seq_file *seq = f->private_data;
put_net(seq->private);
return single_release(ino, f);
}
static const struct proc_ops proc_net_single_ops = {
.proc_open = single_open_net,
.proc_read = seq_read,
.proc_write = proc_simple_write,
.proc_lseek = seq_lseek,
.proc_release = single_release_net,
};
struct proc_dir_entry *proc_create_net_single(const char *name, umode_t mode,
struct proc_dir_entry *parent,
int (*show)(struct seq_file *, void *), void *data)
{
struct proc_dir_entry *p;
p = proc_create_reg(name, mode, &parent, data);
if (!p)
return NULL;
pde_force_lookup(p);
p->proc_ops = &proc_net_single_ops;
p->single_show = show;
return proc_register(parent, p);
}
EXPORT_SYMBOL_GPL(proc_create_net_single);
/**
* proc_create_net_single_write - Create a writable net_ns-specific proc file
* @name: The name of the file.
* @mode: The file's access mode.
* @parent: The parent directory in which to create.
* @show: The seqfile show method with which to read the file.
* @write: The write method with which to 'modify' the file.
* @data: Data for retrieval by pde_data().
*
* Create a network-namespaced proc file in the @parent directory with the
* specified @name and @mode that allows reading of a file that displays a
* single element rather than a series and also provides for the file accepting
* writes that have some arbitrary effect.
*
* The @show function is called to extract the readable content via the
* seq_file interface.
*
* The @write function is called with the data copied into a kernel space
* scratch buffer and has a NUL appended for convenience. The buffer may be
* modified by the @write function. @write should return 0 on success.
*
* The @data value is accessible from the @show and @write functions by calling
* pde_data() on the file inode. The network namespace must be accessed by
* calling seq_file_single_net() on the seq_file struct.
*/
struct proc_dir_entry *proc_create_net_single_write(const char *name, umode_t mode,
struct proc_dir_entry *parent,
int (*show)(struct seq_file *, void *),
proc_write_t write,
void *data)
{
struct proc_dir_entry *p;
p = proc_create_reg(name, mode, &parent, data);
if (!p)
return NULL;
pde_force_lookup(p);
p->proc_ops = &proc_net_single_ops;
p->single_show = show;
p->write = write;
return proc_register(parent, p);
}
EXPORT_SYMBOL_GPL(proc_create_net_single_write);
static struct net *get_proc_task_net(struct inode *dir)
{
struct task_struct *task;
struct nsproxy *ns;
struct net *net = NULL;
rcu_read_lock();
task = pid_task(proc_pid(dir), PIDTYPE_PID);
if (task != NULL) {
task_lock(task);
ns = task->nsproxy;
if (ns != NULL)
net = get_net(ns->net_ns);
task_unlock(task);
}
rcu_read_unlock();
return net;
}
static struct dentry *proc_tgid_net_lookup(struct inode *dir,
struct dentry *dentry, unsigned int flags)
{
struct dentry *de;
struct net *net;
de = ERR_PTR(-ENOENT);
net = get_proc_task_net(dir);
if (net != NULL) {
de = proc_lookup_de(dir, dentry, net->proc_net);
put_net(net);
}
return de;
}
static int proc_tgid_net_getattr(struct mnt_idmap *idmap,
const struct path *path, struct kstat *stat,
u32 request_mask, unsigned int query_flags)
{
struct inode *inode = d_inode(path->dentry);
struct net *net;
net = get_proc_task_net(inode);
generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
if (net != NULL) {
stat->nlink = net->proc_net->nlink;
put_net(net);
}
return 0;
}
const struct inode_operations proc_net_inode_operations = {
.lookup = proc_tgid_net_lookup,
.getattr = proc_tgid_net_getattr,
.setattr = proc_setattr,
};
static int proc_tgid_net_readdir(struct file *file, struct dir_context *ctx)
{
int ret;
struct net *net;
ret = -EINVAL;
net = get_proc_task_net(file_inode(file));
if (net != NULL) {
ret = proc_readdir_de(file, ctx, net->proc_net);
put_net(net);
}
return ret;
}
const struct file_operations proc_net_operations = {
.llseek = generic_file_llseek,
.read = generic_read_dir,
.iterate_shared = proc_tgid_net_readdir,
};
static __net_init int proc_net_ns_init(struct net *net)
{
struct proc_dir_entry *netd, *net_statd;
kuid_t uid;
kgid_t gid;
int err;
/*
* This PDE acts only as an anchor for /proc/${pid}/net hierarchy.
* Corresponding inode (PDE(inode) == net->proc_net) is never
* instantiated therefore blanket zeroing is fine.
* net->proc_net_stat inode is instantiated normally.
*/
err = -ENOMEM;
netd = kmem_cache_zalloc(proc_dir_entry_cache, GFP_KERNEL);
if (!netd)
goto out;
netd->subdir = RB_ROOT;
netd->data = net;
netd->nlink = 2;
netd->namelen = 3;
netd->parent = &proc_root;
netd->name = netd->inline_name;
memcpy(netd->name, "net", 4);
uid = make_kuid(net->user_ns, 0);
if (!uid_valid(uid))
uid = netd->uid;
gid = make_kgid(net->user_ns, 0);
if (!gid_valid(gid))
gid = netd->gid;
proc_set_user(netd, uid, gid);
/* Seed dentry revalidation for /proc/${pid}/net */
pde_force_lookup(netd);
err = -EEXIST;
net_statd = proc_net_mkdir(net, "stat", netd);
if (!net_statd)
goto free_net;
net->proc_net = netd;
net->proc_net_stat = net_statd;
return 0;
free_net:
pde_free(netd);
out:
return err;
}
static __net_exit void proc_net_ns_exit(struct net *net)
{
remove_proc_entry("stat", net->proc_net);
pde_free(net->proc_net);
}
static struct pernet_operations __net_initdata proc_net_ns_ops = {
.init = proc_net_ns_init,
.exit = proc_net_ns_exit,
};
int __init proc_net_init(void)
{
proc_symlink("net", NULL, "self/net");
return register_pernet_subsys(&proc_net_ns_ops);
}