linux-master/ipc/shm.c

697  * @params: ptr to the structure that contains key, size and shmflg
704 	int shmflg = params->flg;
728 	shp->shm_perm.mode = (shmflg & S_IRWXUGO);
739 	if (shmflg & SHM_HUGETLB) {
743 		hs = hstate_sizelog((shmflg >> SHM_HUGE_SHIFT) & SHM_HUGE_MASK);
751 		if (shmflg & SHM_NORESERVE)
754 				HUGETLB_SHMFS_INODE, (shmflg >> SHM_HUGE_SHIFT) & SHM_HUGE_MASK);
760 		if  ((shmflg & SHM_NORESERVE) &&
827 long ksys_shmget(key_t key, size_t size, int shmflg)
840 	shm_params.flg = shmflg;
846 SYSCALL_DEFINE3(shmget, key_t, key, size_t, size, int, shmflg)
848 	return ksys_shmget(key, size, shmflg);
1518 long do_shmat(int shmid, char __user *shmaddr, int shmflg,
1540 			if (shmflg & SHM_RND) {
1548 				if (!addr && (shmflg & SHM_REMAP))
1558 	} else if ((shmflg & SHM_REMAP))
1561 	if (shmflg & SHM_RDONLY) {
1570 	if (shmflg & SHM_EXEC) {
1591 	err = security_shm_shmat(&shp->shm_perm, shmaddr, shmflg);
1652 	if (addr && !(shmflg & SHM_REMAP)) {
1692 SYSCALL_DEFINE3(shmat, int, shmid, char __user *, shmaddr, int, shmflg)
1697 	err = do_shmat(shmid, shmaddr, shmflg, &ret, SHMLBA);
1710 COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
1715 	err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);