Release 4.11 net/core/net_namespace.c
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/workqueue.h>
#include <linux/rtnetlink.h>
#include <linux/cache.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/idr.h>
#include <linux/rculist.h>
#include <linux/nsproxy.h>
#include <linux/fs.h>
#include <linux/proc_ns.h>
#include <linux/file.h>
#include <linux/export.h>
#include <linux/user_namespace.h>
#include <linux/net_namespace.h>
#include <linux/sched/task.h>
#include <net/sock.h>
#include <net/netlink.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
/*
* Our network namespace constructor/destructor lists
*/
static LIST_HEAD(pernet_list);
static struct list_head *first_device = &pernet_list;
DEFINE_MUTEX(net_mutex);
LIST_HEAD(net_namespace_list);
EXPORT_SYMBOL_GPL(net_namespace_list);
struct net init_net = {
.dev_base_head = LIST_HEAD_INIT(init_net.dev_base_head),
};
EXPORT_SYMBOL(init_net);
static bool init_net_initialized;
#define MIN_PERNET_OPS_ID \
((sizeof(struct net_generic) + sizeof(void *) - 1) / sizeof(void *))
#define INITIAL_NET_GEN_PTRS 13
/* +1 for len +2 for rcu_head */
static unsigned int max_gen_ptrs = INITIAL_NET_GEN_PTRS;
static struct net_generic *net_alloc_generic(void)
{
struct net_generic *ng;
unsigned int generic_size = offsetof(struct net_generic, ptr[max_gen_ptrs]);
ng = kzalloc(generic_size, GFP_KERNEL);
if (ng)
ng->s.len = max_gen_ptrs;
return ng;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric Dumazet | 50 | 92.59% | 1 | 33.33% |
Alexey Dobriyan | 4 | 7.41% | 2 | 66.67% |
Total | 54 | 100.00% | 3 | 100.00% |
static int net_assign_generic(struct net *net, unsigned int id, void *data)
{
struct net_generic *ng, *old_ng;
BUG_ON(!mutex_is_locked(&net_mutex));
BUG_ON(id < MIN_PERNET_OPS_ID);
old_ng = rcu_dereference_protected(net->gen,
lockdep_is_held(&net_mutex));
if (old_ng->s.len > id) {
old_ng->ptr[id] = data;
return 0;
}
ng = net_alloc_generic();
if (ng == NULL)
return -ENOMEM;
/*
* Some synchronisation notes:
*
* The net_generic explores the net->gen array inside rcu
* read section. Besides once set the net->gen->ptr[x]
* pointer never changes (see rules in netns/generic.h).
*
* That said, we simply duplicate this array and schedule
* the old copy for kfree after a grace period.
*/
memcpy(&ng->ptr[MIN_PERNET_OPS_ID], &old_ng->ptr[MIN_PERNET_OPS_ID],
(old_ng->s.len - MIN_PERNET_OPS_ID) * sizeof(void *));
ng->ptr[id] = data;
rcu_assign_pointer(net->gen, ng);
kfree_rcu(old_ng, s.rcu);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jiri Pirko | 107 | 65.24% | 1 | 12.50% |
Alexey Dobriyan | 43 | 26.22% | 4 | 50.00% |
Eric Dumazet | 12 | 7.32% | 2 | 25.00% |
Lai Jiangshan | 2 | 1.22% | 1 | 12.50% |
Total | 164 | 100.00% | 8 | 100.00% |
static int ops_init(const struct pernet_operations *ops, struct net *net)
{
int err = -ENOMEM;
void *data = NULL;
if (ops->id && ops->size) {
data = kzalloc(ops->size, GFP_KERNEL);
if (!data)
goto out;
err = net_assign_generic(net, *ops->id, data);
if (err)
goto cleanup;
}
err = 0;
if (ops->init)
err = ops->init(net);
if (!err)
return 0;
cleanup:
kfree(data);
out:
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric W. Biedermann | 79 | 65.83% | 1 | 50.00% |
Julian Anastasov | 41 | 34.17% | 1 | 50.00% |
Total | 120 | 100.00% | 2 | 100.00% |
static void ops_free(const struct pernet_operations *ops, struct net *net)
{
if (ops->id && ops->size) {
kfree(net_generic(net, *ops->id));
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric W. Biedermann | 39 | 92.86% | 1 | 50.00% |
Alexey Dobriyan | 3 | 7.14% | 1 | 50.00% |
Total | 42 | 100.00% | 2 | 100.00% |
static void ops_exit_list(const struct pernet_operations *ops,
struct list_head *net_exit_list)
{
struct net *net;
if (ops->exit) {
list_for_each_entry(net, net_exit_list, exit_list)
ops->exit(net);
}
if (ops->exit_batch)
ops->exit_batch(net_exit_list);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric W. Biedermann | 58 | 100.00% | 1 | 100.00% |
Total | 58 | 100.00% | 1 | 100.00% |
static void ops_free_list(const struct pernet_operations *ops,
struct list_head *net_exit_list)
{
struct net *net;
if (ops->size && ops->id) {
list_for_each_entry(net, net_exit_list, exit_list)
ops_free(ops, net);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric W. Biedermann | 49 | 100.00% | 1 | 100.00% |
Total | 49 | 100.00% | 1 | 100.00% |
/* should be called with nsid_lock held */
static int alloc_netid(struct net *net, struct net *peer, int reqid)
{
int min = 0, max = 0;
if (reqid >= 0) {
min = reqid;
max = reqid + 1;
}
return idr_alloc(&net->netns_ids, peer, min, max, GFP_ATOMIC);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 63 | 100.00% | 3 | 100.00% |
Total | 63 | 100.00% | 3 | 100.00% |
/* This function is used by idr_for_each(). If net is equal to peer, the
* function returns the id so that idr_for_each() stops. Because we cannot
* returns the id 0 (idr_for_each() will not stop), we return the magic value
* NET_ID_ZERO (-1) for it.
*/
#define NET_ID_ZERO -1
static int net_eq_idr(int id, void *net, void *peer)
{
if (net_eq(net, peer))
return id ? : NET_ID_ZERO;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 35 | 100.00% | 1 | 100.00% |
Total | 35 | 100.00% | 1 | 100.00% |
/* Should be called with nsid_lock held. If a new id is assigned, the bool alloc
* is set to true, thus the caller knows that the new id must be notified via
* rtnl.
*/
static int __peernet2id_alloc(struct net *net, struct net *peer, bool *alloc)
{
int id = idr_for_each(&net->netns_ids, net_eq_idr, peer);
bool alloc_it = *alloc;
*alloc = false;
/* Magic value for id 0. */
if (id == NET_ID_ZERO)
return 0;
if (id > 0)
return id;
if (alloc_it) {
id = alloc_netid(net, peer, -1);
*alloc = true;
return id >= 0 ? id : NETNSA_NSID_NOT_ASSIGNED;
}
return NETNSA_NSID_NOT_ASSIGNED;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 100 | 100.00% | 3 | 100.00% |
Total | 100 | 100.00% | 3 | 100.00% |
/* should be called with nsid_lock held */
static int __peernet2id(struct net *net, struct net *peer)
{
bool no = false;
return __peernet2id_alloc(net, peer, &no);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 32 | 100.00% | 1 | 100.00% |
Total | 32 | 100.00% | 1 | 100.00% |
static void rtnl_net_notifyid(struct net *net, int cmd, int id);
/* This function returns the id of a peer netns. If no id is assigned, one will
* be allocated and returned.
*/
int peernet2id_alloc(struct net *net, struct net *peer)
{
bool alloc;
int id;
if (atomic_read(&net->count) == 0)
return NETNSA_NSID_NOT_ASSIGNED;
spin_lock_bh(&net->nsid_lock);
alloc = atomic_read(&peer->count) == 0 ? false : true;
id = __peernet2id_alloc(net, peer, &alloc);
spin_unlock_bh(&net->nsid_lock);
if (alloc && id >= 0)
rtnl_net_notifyid(net, RTM_NEWNSID, id);
return id;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 79 | 79.00% | 5 | 62.50% |
Américo Wang | 19 | 19.00% | 2 | 25.00% |
Paul Moore | 2 | 2.00% | 1 | 12.50% |
Total | 100 | 100.00% | 8 | 100.00% |
/* This function returns, if assigned, the id of a peer netns. */
int peernet2id(struct net *net, struct net *peer)
{
int id;
spin_lock_bh(&net->nsid_lock);
id = __peernet2id(net, peer);
spin_unlock_bh(&net->nsid_lock);
return id;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 40 | 86.96% | 1 | 33.33% |
Américo Wang | 4 | 8.70% | 1 | 33.33% |
Paul Moore | 2 | 4.35% | 1 | 33.33% |
Total | 46 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(peernet2id);
/* This function returns true is the peer netns has an id assigned into the
* current netns.
*/
bool peernet_has_id(struct net *net, struct net *peer)
{
return peernet2id(net, peer) >= 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 25 | 100.00% | 1 | 100.00% |
Total | 25 | 100.00% | 1 | 100.00% |
struct net *get_net_ns_by_id(struct net *net, int id)
{
struct net *peer;
if (id < 0)
return NULL;
rcu_read_lock();
spin_lock_bh(&net->nsid_lock);
peer = idr_find(&net->netns_ids, id);
if (peer)
get_net(peer);
spin_unlock_bh(&net->nsid_lock);
rcu_read_unlock();
return peer;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 69 | 92.00% | 2 | 50.00% |
Américo Wang | 4 | 5.33% | 1 | 25.00% |
Paul Moore | 2 | 2.67% | 1 | 25.00% |
Total | 75 | 100.00% | 4 | 100.00% |
/*
* setup_net runs the initializers for the network namespace object.
*/
static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
{
/* Must be called with net_mutex held */
const struct pernet_operations *ops, *saved_ops;
int error = 0;
LIST_HEAD(net_exit_list);
atomic_set(&net->count, 1);
atomic_set(&net->passive, 1);
net->dev_base_seq = 1;
net->user_ns = user_ns;
idr_init(&net->netns_ids);
spin_lock_init(&net->nsid_lock);
list_for_each_entry(ops, &pernet_list, list) {
error = ops_init(ops, net);
if (error < 0)
goto out_undo;
}
out:
return error;
out_undo:
/* Walk through the list backwards calling the exit functions
* for the pernet modules whose init functions did not fail.
*/
list_add(&net->exit_list, &net_exit_list);
saved_ops = ops;
list_for_each_entry_continue_reverse(ops, &pernet_list, list)
ops_exit_list(ops, &net_exit_list);
ops = saved_ops;
list_for_each_entry_continue_reverse(ops, &pernet_list, list)
ops_free_list(ops, &net_exit_list);
rcu_barrier();
goto out;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric W. Biedermann | 131 | 73.60% | 5 | 35.71% |
Al Viro | 10 | 5.62% | 1 | 7.14% |
Pavel Emelyanov | 10 | 5.62% | 3 | 21.43% |
Américo Wang | 8 | 4.49% | 1 | 7.14% |
Nicolas Dichtel | 8 | 4.49% | 1 | 7.14% |
Thomas Graf | 6 | 3.37% | 1 | 7.14% |
Daniel Lezcano | 5 | 2.81% | 2 | 14.29% |
Total | 178 | 100.00% | 14 | 100.00% |
#ifdef CONFIG_NET_NS
static struct ucounts *inc_net_namespaces(struct user_namespace *ns)
{
return inc_ucount(ns, current_euid(), UCOUNT_NET_NAMESPACES);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Arnd Bergmann | 24 | 100.00% | 1 | 100.00% |
Total | 24 | 100.00% | 1 | 100.00% |
static void dec_net_namespaces(struct ucounts *ucounts)
{
dec_ucount(ucounts, UCOUNT_NET_NAMESPACES);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Arnd Bergmann | 18 | 100.00% | 1 | 100.00% |
Total | 18 | 100.00% | 1 | 100.00% |
static struct kmem_cache *net_cachep;
static struct workqueue_struct *netns_wq;
static struct net *net_alloc(void)
{
struct net *net = NULL;
struct net_generic *ng;
ng = net_alloc_generic();
if (!ng)
goto out;
net = kmem_cache_zalloc(net_cachep, GFP_KERNEL);
if (!net)
goto out_free;
rcu_assign_pointer(net->gen, ng);
out:
return net;
out_free:
kfree(ng);
goto out;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Daniel Lezcano | 59 | 77.63% | 1 | 50.00% |
Pavel Emelyanov | 17 | 22.37% | 1 | 50.00% |
Total | 76 | 100.00% | 2 | 100.00% |
static void net_free(struct net *net)
{
kfree(rcu_access_pointer(net->gen));
kmem_cache_free(net_cachep, net);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johann Felix Soden | 18 | 64.29% | 1 | 33.33% |
Alexey Dobriyan | 7 | 25.00% | 1 | 33.33% |
Eric Dumazet | 3 | 10.71% | 1 | 33.33% |
Total | 28 | 100.00% | 3 | 100.00% |
void net_drop_ns(void *p)
{
struct net *ns = p;
if (ns && atomic_dec_and_test(&ns->passive))
net_free(ns);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Al Viro | 33 | 100.00% | 1 | 100.00% |
Total | 33 | 100.00% | 1 | 100.00% |
struct net *copy_net_ns(unsigned long flags,
struct user_namespace *user_ns, struct net *old_net)
{
struct ucounts *ucounts;
struct net *net;
int rv;
if (!(flags & CLONE_NEWNET))
return get_net(old_net);
ucounts = inc_net_namespaces(user_ns);
if (!ucounts)
return ERR_PTR(-ENOSPC);
net = net_alloc();
if (!net) {
dec_net_namespaces(ucounts);
return ERR_PTR(-ENOMEM);
}
get_user_ns(user_ns);
rv = mutex_lock_killable(&net_mutex);
if (rv < 0) {
net_free(net);
dec_net_namespaces(ucounts);
put_user_ns(user_ns);
return ERR_PTR(rv);
}
net->ucounts = ucounts;
rv = setup_net(net, user_ns);
if (rv == 0) {
rtnl_lock();
list_add_tail_rcu(&net->list, &net_namespace_list);
rtnl_unlock();
}
mutex_unlock(&net_mutex);
if (rv < 0) {
dec_net_namespaces(ucounts);
put_user_ns(user_ns);
net_drop_ns(net);
return ERR_PTR(rv);
}
return net;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric W. Biedermann | 119 | 56.13% | 5 | 45.45% |
Andrey Vagin | 32 | 15.09% | 1 | 9.09% |
Alexey Dobriyan | 30 | 14.15% | 1 | 9.09% |
Rob Landley | 24 | 11.32% | 1 | 9.09% |
Daniel Lezcano | 5 | 2.36% | 1 | 9.09% |
Al Viro | 1 | 0.47% | 1 | 9.09% |
Johannes Berg | 1 | 0.47% | 1 | 9.09% |
Total | 212 | 100.00% | 11 | 100.00% |
static DEFINE_SPINLOCK(cleanup_list_lock);
static LIST_HEAD(cleanup_list); /* Must hold cleanup_list_lock to touch */
static void cleanup_net(struct work_struct *work)
{
const struct pernet_operations *ops;
struct net *net, *tmp;
struct list_head net_kill_list;
LIST_HEAD(net_exit_list);
/* Atomically snapshot the list of namespaces to cleanup */
spin_lock_irq(&cleanup_list_lock);
list_replace_init(&cleanup_list, &net_kill_list);
spin_unlock_irq(&cleanup_list_lock);
mutex_lock(&net_mutex);
/* Don't let anyone else find us. */
rtnl_lock();
list_for_each_entry(net, &net_kill_list, cleanup_list) {
list_del_rcu(&net->list);
list_add_tail(&net->exit_list, &net_exit_list);
for_each_net(tmp) {
int id;
spin_lock_bh(&tmp->nsid_lock);
id = __peernet2id(tmp, net);
if (id >= 0)
idr_remove(&tmp->netns_ids, id);
spin_unlock_bh(&tmp->nsid_lock);
if (id >= 0)
rtnl_net_notifyid(tmp, RTM_DELNSID, id);
}
spin_lock_bh(&net->nsid_lock);
idr_destroy(&net->netns_ids);
spin_unlock_bh(&net->nsid_lock);
}
rtnl_unlock();
/*
* Another CPU might be rcu-iterating the list, wait for it.
* This needs to be before calling the exit() notifiers, so
* the rcu_barrier() below isn't sufficient alone.
*/
synchronize_rcu();
/* Run all of the network namespace exit methods */
list_for_each_entry_reverse(ops, &pernet_list, list)
ops_exit_list(ops, &net_exit_list);
/* Free the net generic variables */
list_for_each_entry_reverse(ops, &pernet_list, list)
ops_free_list(ops, &net_exit_list);
mutex_unlock(&net_mutex);
/* Ensure there are no outstanding rcu callbacks using this
* network namespace.
*/
rcu_barrier();
/* Finally it is safe to free my network namespace structure */
list_for_each_entry_safe(net, tmp, &net_exit_list, exit_list) {
list_del_init(&net->exit_list);
dec_net_namespaces(net->ucounts);
put_user_ns(net->user_ns);
net_drop_ns(net);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric W. Biedermann | 108 | 39.27% | 5 | 35.71% |
Nicolas Dichtel | 77 | 28.00% | 3 | 21.43% |
Pavel Emelyanov | 69 | 25.09% | 1 | 7.14% |
Américo Wang | 8 | 2.91% | 1 | 7.14% |
Johannes Berg | 5 | 1.82% | 1 | 7.14% |
Paul Moore | 4 | 1.45% | 1 | 7.14% |
xiao jin | 3 | 1.09% | 1 | 7.14% |
Al Viro | 1 | 0.36% | 1 | 7.14% |
Total | 275 | 100.00% | 14 | 100.00% |
static DECLARE_WORK(net_cleanup_work, cleanup_net);
void __put_net(struct net *net)
{
/* Cleanup the network namespace in process context */
unsigned long flags;
spin_lock_irqsave(&cleanup_list_lock, flags);
list_add(&net->cleanup_list, &cleanup_list);
spin_unlock_irqrestore(&cleanup_list_lock, flags);
queue_work(netns_wq, &net_cleanup_work);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric W. Biedermann | 25 | 50.00% | 1 | 33.33% |
Pavel Emelyanov | 22 | 44.00% | 1 | 33.33% |
Benjamin Thery | 3 | 6.00% | 1 | 33.33% |
Total | 50 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(__put_net);
struct net *get_net_ns_by_fd(int fd)
{
struct file *file;
struct ns_common *ns;
struct net *net;
file = proc_ns_fget(fd);
if (IS_ERR(file))
return ERR_CAST(file);
ns = get_proc_ns(file_inode(file));
if (ns->ops == &netns_operations)
net = get_net(container_of(ns, struct net, ns));
else
net = ERR_PTR(-EINVAL);
fput(file);
return net;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Stephen Rothwell | 57 | 59.38% | 1 | 14.29% |
Al Viro | 38 | 39.58% | 5 | 71.43% |
David Howells | 1 | 1.04% | 1 | 14.29% |
Total | 96 | 100.00% | 7 | 100.00% |
#else
struct net *get_net_ns_by_fd(int fd)
{
return ERR_PTR(-EINVAL);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Stephen Rothwell | 17 | 100.00% | 1 | 100.00% |
Total | 17 | 100.00% | 1 | 100.00% |
#endif
EXPORT_SYMBOL_GPL(get_net_ns_by_fd);
struct net *get_net_ns_by_pid(pid_t pid)
{
struct task_struct *tsk;
struct net *net;
/* Lookup the network namespace */
net = ERR_PTR(-ESRCH);
rcu_read_lock();
tsk = find_task_by_vpid(pid);
if (tsk) {
struct nsproxy *nsproxy;
task_lock(tsk);
nsproxy = tsk->nsproxy;
if (nsproxy)
net = get_net(nsproxy->net_ns);
task_unlock(tsk);
}
rcu_read_unlock();
return net;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Johannes Berg | 73 | 85.88% | 1 | 50.00% |
Eric W. Biedermann | 12 | 14.12% | 1 | 50.00% |
Total | 85 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(get_net_ns_by_pid);
static __net_init int net_ns_net_init(struct net *net)
{
#ifdef CONFIG_NET_NS
net->ns.ops = &netns_operations;
#endif
return ns_alloc_inum(&net->ns);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric W. Biedermann | 19 | 54.29% | 1 | 25.00% |
Al Viro | 16 | 45.71% | 3 | 75.00% |
Total | 35 | 100.00% | 4 | 100.00% |
static __net_exit void net_ns_net_exit(struct net *net)
{
ns_free_inum(&net->ns);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric W. Biedermann | 17 | 85.00% | 1 | 33.33% |
Al Viro | 3 | 15.00% | 2 | 66.67% |
Total | 20 | 100.00% | 3 | 100.00% |
static struct pernet_operations __net_initdata net_ns_ops = {
.init = net_ns_net_init,
.exit = net_ns_net_exit,
};
static const struct nla_policy rtnl_net_policy[NETNSA_MAX + 1] = {
[NETNSA_NONE] = { .type = NLA_UNSPEC },
[NETNSA_NSID] = { .type = NLA_S32 },
[NETNSA_PID] = { .type = NLA_U32 },
[NETNSA_FD] = { .type = NLA_U32 },
};
static int rtnl_net_newid(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
struct nlattr *tb[NETNSA_MAX + 1];
struct net *peer;
int nsid, err;
err = nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, NETNSA_MAX,
rtnl_net_policy);
if (err < 0)
return err;
if (!tb[NETNSA_NSID])
return -EINVAL;
nsid = nla_get_s32(tb[NETNSA_NSID]);
if (tb[NETNSA_PID])
peer = get_net_ns_by_pid(nla_get_u32(tb[NETNSA_PID]));
else if (tb[NETNSA_FD])
peer = get_net_ns_by_fd(nla_get_u32(tb[NETNSA_FD]));
else
return -EINVAL;
if (IS_ERR(peer))
return PTR_ERR(peer);
spin_lock_bh(&net->nsid_lock);
if (__peernet2id(net, peer) >= 0) {
spin_unlock_bh(&net->nsid_lock);
err = -EEXIST;
goto out;
}
err = alloc_netid(net, peer, nsid);
spin_unlock_bh(&net->nsid_lock);
if (err >= 0) {
rtnl_net_notifyid(net, RTM_NEWNSID, err);
err = 0;
}
out:
put_net(peer);
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 180 | 73.77% | 4 | 36.36% |
Eric W. Biedermann | 31 | 12.70% | 2 | 18.18% |
Daniel Lezcano | 11 | 4.51% | 1 | 9.09% |
Benjamin Thery | 10 | 4.10% | 1 | 9.09% |
Américo Wang | 6 | 2.46% | 1 | 9.09% |
Paul Moore | 3 | 1.23% | 1 | 9.09% |
Stephen Hemminger | 3 | 1.23% | 1 | 9.09% |
Total | 244 | 100.00% | 11 | 100.00% |
static int rtnl_net_get_size(void)
{
return NLMSG_ALIGN(sizeof(struct rtgenmsg))
+ nla_total_size(sizeof(s32)) /* NETNSA_NSID */
;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 27 | 100.00% | 1 | 100.00% |
Total | 27 | 100.00% | 1 | 100.00% |
static int rtnl_net_fill(struct sk_buff *skb, u32 portid, u32 seq, int flags,
int cmd, struct net *net, int nsid)
{
struct nlmsghdr *nlh;
struct rtgenmsg *rth;
nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rth), flags);
if (!nlh)
return -EMSGSIZE;
rth = nlmsg_data(nlh);
rth->rtgen_family = AF_UNSPEC;
if (nla_put_s32(skb, NETNSA_NSID, nsid))
goto nla_put_failure;
nlmsg_end(skb, nlh);
return 0;
nla_put_failure:
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Nicolas Dichtel | 121 | 100.00% | 3 | 100.00% |
Total | 121 | 100.00% | 3 | 100.00% |
static int rtnl_net_getid(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
struct nlattr *tb[NETNSA_MAX + 1];
struct sk_buff *msg;
struct net *peer;
int err, id;
err = nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, NETNSA_MAX,
rtnl_net_policy);
if (err < 0)
return err;
if (tb[NETNSA_PID])
peer = get_net_ns_by_pid(nla_get_u32(tb[NETNSA_PID]));
else if (tb[NETNSA_FD])
peer = get_net_ns_by_fd(nla_get_u32(tb[NETNSA_FD]));
else
return -EINVAL;
if (IS_ERR(peer))
return PTR_ERR(