sys/kern/sysv_sem.c

119 static struct semid_kernel *sema;	/* semaphore id pool */
231 SYSCTL_PROC(_kern_ipc, OID_AUTO, sema,
283 	sema = malloc(sizeof(struct semid_kernel) * seminfo.semmni, M_SEM,
291 		sema[i].u.__sem_base = 0;
292 		sema[i].u.sem_perm.mode = 0;
293 		sema[i].u.sem_perm.seq = 0;
295 		mac_sysvsem_init(&sema[i]);
364 		mac_sysvsem_destroy(&sema[i]);
367 	free(sema, M_SEM);
563 	semakptr = &sema[semidx];
565 	    ("sem_remove: sema %d corrupted sem pointer %p %p %d %d",
583 		if ((sema[i].u.sem_perm.mode & SEM_ALLOC) &&
584 		    sema[i].u.__sem_base > semakptr->u.__sem_base)
591 		if ((sema[i].u.sem_perm.mode & SEM_ALLOC) &&
592 		    sema[i].u.__sem_base > semakptr->u.__sem_base) {
593 			sema[i].u.__sem_base -= semakptr->u.sem_nsems;
726 		semakptr = &sema[semid];
754 	semakptr = &sema[semidx];
985 			if ((sema[semid].u.sem_perm.mode & SEM_ALLOC) &&
986 			    sema[semid].cred != NULL &&
987 			    sema[semid].cred->cr_prison == cred->cr_prison &&
988 			    sema[semid].u.sem_perm.key == key)
999 			if ((error = ipcperm(td, &sema[semid].u.sem_perm,
1003 			if (nsems > 0 && sema[semid].u.sem_nsems < nsems) {
1009 			error = mac_sysvsem_check_semget(cred, &sema[semid]);
1033 			if ((sema[semid].u.sem_perm.mode & SEM_ALLOC) == 0)
1054 		KASSERT((sema[semid].u.sem_perm.mode & SEM_ALLOC) == 0,
1056 		sema[semid].u.sem_perm.key = key;
1057 		sema[semid].u.sem_perm.cuid = cred->cr_uid;
1058 		sema[semid].u.sem_perm.uid = cred->cr_uid;
1059 		sema[semid].u.sem_perm.cgid = cred->cr_gid;
1060 		sema[semid].u.sem_perm.gid = cred->cr_gid;
1061 		sema[semid].u.sem_perm.mode = (semflg & 0777) | SEM_ALLOC;
1062 		sema[semid].cred = crhold(cred);
1063 		sema[semid].u.sem_perm.seq =
1064 		    (sema[semid].u.sem_perm.seq + 1) & 0x7fff;
1065 		sema[semid].u.sem_nsems = nsems;
1066 		sema[semid].u.sem_otime = 0;
1067 		sema[semid].u.sem_ctime = time_second;
1068 		sema[semid].u.__sem_base = &sem[semtot];
1070 		bzero(sema[semid].u.__sem_base,
1071 		    sizeof(sema[semid].u.__sem_base[0])*nsems);
1073 		mac_sysvsem_create(cred, &sema[semid]);
1077 		    sema[semid].u.__sem_base, &sem[semtot]));
1085 	td->td_retval[0] = IXSEQ_TO_IPCID(semid, sema[semid].u.sem_perm);
1163 	semakptr = &sema[semid];
1457 			semakptr = &sema[semid];
1516 		if ((sema[i].u.sem_perm.mode & SEM_ALLOC) == 0 ||
1517 		    rpr == NULL || sem_prison_cansee(rpr, &sema[i]) != 0)
1520 			tsemak = sema[i];
1717 		if ((sema[i].u.sem_perm.mode & SEM_ALLOC) &&
1718 		    sema[i].cred != NULL && sema[i].cred->cr_prison == pr) {