linux-master/ipc/sem.c

272 				"       key      semid perms      nsems   uid   gid  cuid  cgid      otime      ctime\n",
510 static struct sem_array *sem_alloc(size_t nsems)
514 	if (nsems > (INT_MAX - sizeof(*sma)) / sizeof(sma->sems[0]))
517 	sma = kvzalloc(struct_size(sma, sems, nsems), GFP_KERNEL_ACCOUNT);
527  * @params: ptr to the structure that contains key, semflg and nsems
536 	int nsems = params->u.nsems;
540 	if (!nsems)
542 	if (ns->used_sems + nsems > ns->sc_semmns)
545 	sma = sem_alloc(nsems);
559 	for (i = 0; i < nsems; i++) {
570 	sma->sem_nsems = nsems;
579 	ns->used_sems += nsems;
596 	if (params->u.nsems > sma->sem_nsems)
602 long ksys_semget(key_t key, int nsems, int semflg)
614 	if (nsems < 0 || nsems > ns->sc_semmsl)
619 	sem_params.u.nsems = nsems;
624 SYSCALL_DEFINE3(semget, key_t, key, int, nsems, int, semflg)
626 	return ksys_semget(key, nsems, semflg);
1410 	int err, nsems;
1422 	nsems = sma->sem_nsems;
1443 		if (nsems > SEMMSL_FAST) {
1450 			sem_io = kvmalloc_array(nsems, sizeof(ushort),
1469 		if (copy_to_user(array, sem_io, nsems*sizeof(ushort)))
1484 		if (nsems > SEMMSL_FAST) {
1485 			sem_io = kvmalloc_array(nsems, sizeof(ushort),
1493 		if (copy_from_user(sem_io, p, nsems*sizeof(ushort))) {
1499 		for (i = 0; i < nsems; i++) {
1513 		for (i = 0; i < nsems; i++) {
1520 			for (i = 0; i < nsems; i++)
1532 	if (semnum < 0 || semnum >= nsems)
1541 	semnum = array_index_nospec(semnum, nsems);
1911 	int nsems, error;
1932 	nsems = sma->sem_nsems;
1941 	new = kvzalloc(struct_size(new, semadj, nsems), GFP_KERNEL_ACCOUNT);