65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
#ifndef _LINUX_SHM_H_
|
|
#define _LINUX_SHM_H_
|
|
|
|
#include <linux/list.h>
|
|
#include <asm/page.h>
|
|
#include <uapi/linux/shm.h>
|
|
#include <asm/shmparam.h>
|
|
|
|
struct shmid_kernel /* private to the kernel */
|
|
{
|
|
struct kern_ipc_perm shm_perm;
|
|
struct file *shm_file;
|
|
unsigned long shm_nattch;
|
|
unsigned long shm_segsz;
|
|
time64_t shm_atim;
|
|
time64_t shm_dtim;
|
|
time64_t shm_ctim;
|
|
pid_t shm_cprid;
|
|
pid_t shm_lprid;
|
|
struct user_struct *mlock_user;
|
|
|
|
/* The task created the shm object. NULL if the task is dead. */
|
|
struct task_struct *shm_creator;
|
|
struct list_head shm_clist; /* list by creator */
|
|
} __randomize_layout;
|
|
|
|
/* shm_mode upper byte flags */
|
|
#define SHM_DEST 01000 /* segment will be destroyed on last detach */
|
|
#define SHM_LOCKED 02000 /* segment will not be swapped */
|
|
|
|
#ifdef CONFIG_SYSVIPC
|
|
struct sysv_shm {
|
|
struct list_head shm_clist;
|
|
};
|
|
|
|
long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr,
|
|
unsigned long shmlba);
|
|
bool is_file_shm_hugepages(struct file *file);
|
|
void exit_shm(struct task_struct *task);
|
|
#define shm_init_task(task) INIT_LIST_HEAD(&(task)->sysvshm.shm_clist)
|
|
#else
|
|
struct sysv_shm {
|
|
/* empty */
|
|
};
|
|
|
|
static inline long do_shmat(int shmid, char __user *shmaddr,
|
|
int shmflg, unsigned long *addr,
|
|
unsigned long shmlba)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
static inline bool is_file_shm_hugepages(struct file *file)
|
|
{
|
|
return false;
|
|
}
|
|
static inline void exit_shm(struct task_struct *task)
|
|
{
|
|
}
|
|
static inline void shm_init_task(struct task_struct *task)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif /* _LINUX_SHM_H_ */
|