#ifndef _LINUX_NSPROXY_H
#define _LINUX_NSPROXY_H

#include <linux/spinlock.h>
#include <linux/sched.h>

struct mnt_namespace;
struct uts_namespace;
struct ipc_namespace;
struct pid_namespace;
struct fs_struct;

/*
 * A structure to contain pointers to all per-process
 * namespaces - fs (mount), uts, network, sysvipc, etc.
 *
 * 'count' is the number of tasks holding a reference.
 * The count for each namespace, then, will be the number
 * of nsproxies pointing to it, not the number of tasks.
 *
 * The nsproxy is shared by tasks which share all namespaces.
 * As soon as a single namespace is cloned or unshared, the
 * nsproxy is copied.
 */
struct nsproxy {
	atomic_t count;
	struct uts_namespace *uts_ns;
	struct ipc_namespace *ipc_ns;
	struct mnt_namespace *mnt_ns;
	struct pid_namespace *pid_ns;
	struct net 	     *net_ns;
};
extern struct nsproxy init_nsproxy;

/*
 * the namespaces access rules are:
 *
 *  1. only current task is allowed to change tsk->nsproxy pointer or
 *     any pointer on the nsproxy itself
 *
 *  2. when accessing (i.e. reading) current task's namespaces - no
 *     precautions should be taken - just dereference the pointers
 *
 *  3. the access to other task namespaces is performed like this
 *     rcu_read_lock();
 *     nsproxy = task_nsproxy(tsk);
 *     if (nsproxy != NULL) {
 *             / *
 *               * work with the namespaces here
 *               * e.g. get the reference on one of them
 *               * /
 *     } / *
 *         * NULL task_nsproxy() means that this task is
 *         * almost dead (zombie)
 *         * /
 *     rcu_read_unlock();
 *
 */

static inline struct nsproxy *task_nsproxy(struct task_struct *tsk)
{
	return rcu_dereference(tsk->nsproxy);
}

int copy_namespaces(unsigned long flags, struct task_struct *tsk);
void exit_task_namespaces(struct task_struct *tsk);
void switch_task_namespaces(struct task_struct *tsk, struct nsproxy *new);
void free_nsproxy(struct nsproxy *ns);
int unshare_nsproxy_namespaces(unsigned long, struct nsproxy **,
	struct cred *, struct fs_struct *);
int __init nsproxy_cache_init(void);

static inline void put_nsproxy(struct nsproxy *ns)
{
	if (atomic_dec_and_test(&ns->count)) {
		free_nsproxy(ns);
	}
}

static inline void get_nsproxy(struct nsproxy *ns)
{
	atomic_inc(&ns->count);
}

#endif
n value='linux-2.6.35.y'>linux-2.6.35.y</option>
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<option value='linux-3.12.y'>linux-3.12.y</option>
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<option value='master' selected='selected'>master</option>
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<tr><td class='sub'>Hosts the 0x221E linux distro kernel.</td><td class='sub right'>Ubuntu</td></tr></table>
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<div class='path'>path: <a href='/distro/kernel/log/?h=master&amp;id=27ac792ca0b0a1e7e65f20342260650516c95864'>root</a>/<a href='/distro/kernel/log/include?h=master&amp;id=27ac792ca0b0a1e7e65f20342260650516c95864'>include</a>/<a href='/distro/kernel/log/include/asm-m32r?h=master&amp;id=27ac792ca0b0a1e7e65f20342260650516c95864'>asm-m32r</a>/<a href='/distro/kernel/log/include/asm-m32r/topology.h?h=master&amp;id=27ac792ca0b0a1e7e65f20342260650516c95864'>topology.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/distro/kernel/log/include/asm-m32r/topology.h?h=master&amp;id=27ac792ca0b0a1e7e65f20342260650516c95864&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
f6efc675c9dd8d93f826b79ae7e33e03301db609'>net: ppp: resolve forwarding path for bridge pppoe devices</a></td><td>Felix Fietkau</td></tr>
<tr><td><span title='2021-03-17 12:18:18 -0700'>2021-03-17</span></td><td><a href='/distro/kernel/commit/drivers/net/ppp/pppoe.c?id=73a2218cb268ff62f42420cf37acfb2a2d300959'>net: ppp: Mundane typo fixes in the file pppoe.c</a></td><td>Bhaskar Chowdhury</td></tr>
<tr><td><span title='2020-07-19 18:16:41 -0700'>2020-07-19</span></td><td><a href='/distro/kernel/commit/drivers/net/ppp/pppoe.c?id=a44d9e72100f7044ac46e4e6dc475f5b4097830f'>net: make -&gt;{get,set}sockopt in proto_ops optional</a></td><td>Christoph Hellwig</td></tr>
<tr><td><span title='2020-05-14 13:02:50 -0700'>2020-05-14</span></td><td><a href='/distro/kernel/commit/drivers/net/ppp/pppoe.c?id=b8c158395119be62294da73646a3953c29ac974b'>pppoe: only process PADT targeted at local interfaces</a></td><td>Guillaume Nault</td></tr>
<tr><td><span title='2019-12-07 11:52:23 -0800'>2019-12-07</span></td><td><a href='/distro/kernel/commit/drivers/net/ppp/pppoe.c?id=02a896ca84874bbfcedc006303f2951dda89b298'>pppoe: remove redundant BUG_ON() check in pppoe_pernet</a></td><td>Aditya Pakki</td></tr>
<tr><td><span title='2019-07-30 14:42:13 -0700'>2019-07-30</span></td><td><a href='/distro/kernel/commit/drivers/net/ppp/pppoe.c?id=055d88242a6046a1ceac3167290f054c72571cd9'>compat_ioctl: pppoe: fix PPPOEIOCSFWD handling</a></td><td>Arnd Bergmann</td></tr>
<tr><td><span title='2019-05-30 11:26:32 -0700'>2019-05-30</span></td><td><a href='/distro/kernel/commit/drivers/net/ppp/pppoe.c?id=2874c5fd284268364ece81a7bd936f3c8168e567'>treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152</a></td><td>Thomas Gleixner</td></tr>
<tr><td><span title='2019-01-18 14:05:14 -0800'>2019-01-18</span></td><td><a href='/distro/kernel/commit/drivers/net/ppp/pppoe.c?id=6c57f0458022298e4da1729c67bd33ce41c14e7a'>net: Fix usage of pskb_trim_rcsum</a></td><td>Ross Lagerwall</td></tr>
<tr><td><span title='2018-09-17 07:50:26 -0700'>2018-09-17</span></td><td><a href='/distro/kernel/commit/drivers/net/ppp/pppoe.c?id=8540827ebac6b654ab2f69c8fbce9e4fbd6304a0'>pppoe: fix reception of frames with no mac header</a></td><td>Guillaume Nault</td></tr>