mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 02:46:55 +07:00
665c7741fb
Function is really private to ipc/ and avoid struct kern_ipc_perm forward declaration. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
141 lines
3.5 KiB
C
141 lines
3.5 KiB
C
#ifndef __IPC_NAMESPACE_H__
|
|
#define __IPC_NAMESPACE_H__
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/idr.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/notifier.h>
|
|
|
|
/*
|
|
* ipc namespace events
|
|
*/
|
|
#define IPCNS_MEMCHANGED 0x00000001 /* Notify lowmem size changed */
|
|
#define IPCNS_CREATED 0x00000002 /* Notify new ipc namespace created */
|
|
#define IPCNS_REMOVED 0x00000003 /* Notify ipc namespace removed */
|
|
|
|
#define IPCNS_CALLBACK_PRI 0
|
|
|
|
|
|
struct ipc_ids {
|
|
int in_use;
|
|
unsigned short seq;
|
|
unsigned short seq_max;
|
|
struct rw_semaphore rw_mutex;
|
|
struct idr ipcs_idr;
|
|
};
|
|
|
|
struct ipc_namespace {
|
|
atomic_t count;
|
|
struct ipc_ids ids[3];
|
|
|
|
int sem_ctls[4];
|
|
int used_sems;
|
|
|
|
int msg_ctlmax;
|
|
int msg_ctlmnb;
|
|
int msg_ctlmni;
|
|
atomic_t msg_bytes;
|
|
atomic_t msg_hdrs;
|
|
int auto_msgmni;
|
|
|
|
size_t shm_ctlmax;
|
|
size_t shm_ctlall;
|
|
int shm_ctlmni;
|
|
int shm_tot;
|
|
|
|
struct notifier_block ipcns_nb;
|
|
|
|
/* The kern_mount of the mqueuefs sb. We take a ref on it */
|
|
struct vfsmount *mq_mnt;
|
|
|
|
/* # queues in this ns, protected by mq_lock */
|
|
unsigned int mq_queues_count;
|
|
|
|
/* next fields are set through sysctl */
|
|
unsigned int mq_queues_max; /* initialized to DFLT_QUEUESMAX */
|
|
unsigned int mq_msg_max; /* initialized to DFLT_MSGMAX */
|
|
unsigned int mq_msgsize_max; /* initialized to DFLT_MSGSIZEMAX */
|
|
|
|
};
|
|
|
|
extern struct ipc_namespace init_ipc_ns;
|
|
extern atomic_t nr_ipc_ns;
|
|
|
|
extern spinlock_t mq_lock;
|
|
#if defined(CONFIG_POSIX_MQUEUE) || defined(CONFIG_SYSVIPC)
|
|
#define INIT_IPC_NS(ns) .ns = &init_ipc_ns,
|
|
#else
|
|
#define INIT_IPC_NS(ns)
|
|
#endif
|
|
|
|
#ifdef CONFIG_SYSVIPC
|
|
extern int register_ipcns_notifier(struct ipc_namespace *);
|
|
extern int cond_register_ipcns_notifier(struct ipc_namespace *);
|
|
extern void unregister_ipcns_notifier(struct ipc_namespace *);
|
|
extern int ipcns_notify(unsigned long);
|
|
#else /* CONFIG_SYSVIPC */
|
|
static inline int register_ipcns_notifier(struct ipc_namespace *ns)
|
|
{ return 0; }
|
|
static inline int cond_register_ipcns_notifier(struct ipc_namespace *ns)
|
|
{ return 0; }
|
|
static inline void unregister_ipcns_notifier(struct ipc_namespace *ns) { }
|
|
static inline int ipcns_notify(unsigned long l) { return 0; }
|
|
#endif /* CONFIG_SYSVIPC */
|
|
|
|
#ifdef CONFIG_POSIX_MQUEUE
|
|
extern int mq_init_ns(struct ipc_namespace *ns);
|
|
/* default values */
|
|
#define DFLT_QUEUESMAX 256 /* max number of message queues */
|
|
#define DFLT_MSGMAX 10 /* max number of messages in each queue */
|
|
#define HARD_MSGMAX (131072/sizeof(void *))
|
|
#define DFLT_MSGSIZEMAX 8192 /* max message size */
|
|
#else
|
|
static inline int mq_init_ns(struct ipc_namespace *ns) { return 0; }
|
|
#endif
|
|
|
|
#if defined(CONFIG_IPC_NS)
|
|
extern struct ipc_namespace *copy_ipcs(unsigned long flags,
|
|
struct ipc_namespace *ns);
|
|
static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
|
|
{
|
|
if (ns)
|
|
atomic_inc(&ns->count);
|
|
return ns;
|
|
}
|
|
|
|
extern void put_ipc_ns(struct ipc_namespace *ns);
|
|
#else
|
|
static inline struct ipc_namespace *copy_ipcs(unsigned long flags,
|
|
struct ipc_namespace *ns)
|
|
{
|
|
if (flags & CLONE_NEWIPC)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
return ns;
|
|
}
|
|
|
|
static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
|
|
{
|
|
return ns;
|
|
}
|
|
|
|
static inline void put_ipc_ns(struct ipc_namespace *ns)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_POSIX_MQUEUE_SYSCTL
|
|
|
|
struct ctl_table_header;
|
|
extern struct ctl_table_header *mq_register_sysctl_table(void);
|
|
|
|
#else /* CONFIG_POSIX_MQUEUE_SYSCTL */
|
|
|
|
static inline struct ctl_table_header *mq_register_sysctl_table(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* CONFIG_POSIX_MQUEUE_SYSCTL */
|
|
#endif
|