e8cfbc245e
pidhash is no longer required as all the information can be looked up from idr tree. nr_hashed represented the number of pids that had been hashed. Since, nr_hashed and PIDNS_HASH_ADDING are no longer relevant, it has been renamed to pid_allocated and PIDNS_ADDING respectively. [gs051095@gmail.com: v6] Link: http://lkml.kernel.org/r/1507760379-21662-3-git-send-email-gs051095@gmail.com Link: http://lkml.kernel.org/r/1507583624-22146-3-git-send-email-gs051095@gmail.com Signed-off-by: Gargi Sharma <gs051095@gmail.com> Reviewed-by: Rik van Riel <riel@redhat.com> Tested-by: Tony Luck <tony.luck@intel.com> [ia64] Cc: Julia Lawall <julia.lawall@lip6.fr> Cc: Ingo Molnar <mingo@kernel.org> Cc: Pavel Tatashin <pasha.tatashin@oracle.com> Cc: Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_PID_NS_H
|
|
#define _LINUX_PID_NS_H
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/bug.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/nsproxy.h>
|
|
#include <linux/kref.h>
|
|
#include <linux/ns_common.h>
|
|
#include <linux/idr.h>
|
|
|
|
|
|
struct fs_pin;
|
|
|
|
enum { /* definitions for pid_namespace's hide_pid field */
|
|
HIDEPID_OFF = 0,
|
|
HIDEPID_NO_ACCESS = 1,
|
|
HIDEPID_INVISIBLE = 2,
|
|
};
|
|
|
|
struct pid_namespace {
|
|
struct kref kref;
|
|
struct idr idr;
|
|
struct rcu_head rcu;
|
|
unsigned int pid_allocated;
|
|
struct task_struct *child_reaper;
|
|
struct kmem_cache *pid_cachep;
|
|
unsigned int level;
|
|
struct pid_namespace *parent;
|
|
#ifdef CONFIG_PROC_FS
|
|
struct vfsmount *proc_mnt;
|
|
struct dentry *proc_self;
|
|
struct dentry *proc_thread_self;
|
|
#endif
|
|
#ifdef CONFIG_BSD_PROCESS_ACCT
|
|
struct fs_pin *bacct;
|
|
#endif
|
|
struct user_namespace *user_ns;
|
|
struct ucounts *ucounts;
|
|
struct work_struct proc_work;
|
|
kgid_t pid_gid;
|
|
int hide_pid;
|
|
int reboot; /* group exit code if this pidns was rebooted */
|
|
struct ns_common ns;
|
|
} __randomize_layout;
|
|
|
|
extern struct pid_namespace init_pid_ns;
|
|
|
|
#define PIDNS_ADDING (1U << 31)
|
|
|
|
#ifdef CONFIG_PID_NS
|
|
static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
|
|
{
|
|
if (ns != &init_pid_ns)
|
|
kref_get(&ns->kref);
|
|
return ns;
|
|
}
|
|
|
|
extern struct pid_namespace *copy_pid_ns(unsigned long flags,
|
|
struct user_namespace *user_ns, struct pid_namespace *ns);
|
|
extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
|
|
extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd);
|
|
extern void put_pid_ns(struct pid_namespace *ns);
|
|
|
|
#else /* !CONFIG_PID_NS */
|
|
#include <linux/err.h>
|
|
|
|
static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
|
|
{
|
|
return ns;
|
|
}
|
|
|
|
static inline struct pid_namespace *copy_pid_ns(unsigned long flags,
|
|
struct user_namespace *user_ns, struct pid_namespace *ns)
|
|
{
|
|
if (flags & CLONE_NEWPID)
|
|
ns = ERR_PTR(-EINVAL);
|
|
return ns;
|
|
}
|
|
|
|
static inline void put_pid_ns(struct pid_namespace *ns)
|
|
{
|
|
}
|
|
|
|
static inline void zap_pid_ns_processes(struct pid_namespace *ns)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_PID_NS */
|
|
|
|
extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk);
|
|
void pidhash_init(void);
|
|
void pid_idr_init(void);
|
|
|
|
#endif /* _LINUX_PID_NS_H */
|