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Differential D13459 Diff 38780 head/sys/kern/sysv_sem.c

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head/sys/kern/sysv_sem.c

Show First 20 Lines • Show All 274 Lines • ▼ Show 20 Lines osd_method_t methods[PR_MAXMETHOD] = {
[PR_METHOD_CHECK] = sem_prison_check, [PR_METHOD_CHECK] = sem_prison_check,
[PR_METHOD_SET] = sem_prison_set, [PR_METHOD_SET] = sem_prison_set,
[PR_METHOD_GET] = sem_prison_get, [PR_METHOD_GET] = sem_prison_get,
[PR_METHOD_REMOVE] = sem_prison_remove, [PR_METHOD_REMOVE] = sem_prison_remove,
}; };
sem = malloc(sizeof(struct sem) * seminfo.semmns, M_SEM, M_WAITOK); sem = malloc(sizeof(struct sem) * seminfo.semmns, M_SEM, M_WAITOK);
sema = malloc(sizeof(struct semid_kernel) * seminfo.semmni, M_SEM, sema = malloc(sizeof(struct semid_kernel) * seminfo.semmni, M_SEM,
M_WAITOK); M_WAITOK | M_ZERO);
sema_mtx = malloc(sizeof(struct mtx) * seminfo.semmni, M_SEM, sema_mtx = malloc(sizeof(struct mtx) * seminfo.semmni, M_SEM,
M_WAITOK | M_ZERO); M_WAITOK | M_ZERO);
semu = malloc(seminfo.semmnu * seminfo.semusz, M_SEM, M_WAITOK); semu = malloc(seminfo.semmnu * seminfo.semusz, M_SEM, M_WAITOK);
for (i = 0; i < seminfo.semmni; i++) { for (i = 0; i < seminfo.semmni; i++) {
sema[i].u.sem_base = 0; sema[i].u.sem_base = 0;
sema[i].u.sem_perm.mode = 0; sema[i].u.sem_perm.mode = 0;
sema[i].u.sem_perm.seq = 0; sema[i].u.sem_perm.seq = 0;
▲ Show 20 Lines • Show All 1,190 Lines • ▼ Show 20 Linessemexit_myhook(void *arg, struct proc *p)
SEMUNDO_UNLOCK(); SEMUNDO_UNLOCK();
} }
static int static int
sysctl_sema(SYSCTL_HANDLER_ARGS) sysctl_sema(SYSCTL_HANDLER_ARGS)
{ {
struct prison *pr, *rpr; struct prison *pr, *rpr;
struct semid_kernel tsemak; struct semid_kernel tsemak;
#ifdef COMPAT_FREEBSD32
struct semid_kernel32 tsemak32;
#endif
void *outaddr;
size_t outsize;
int error, i; int error, i;
pr = req->td->td_ucred->cr_prison; pr = req->td->td_ucred->cr_prison;
rpr = sem_find_prison(req->td->td_ucred); rpr = sem_find_prison(req->td->td_ucred);
error = 0; error = 0;
for (i = 0; i < seminfo.semmni; i++) { for (i = 0; i < seminfo.semmni; i++) {
mtx_lock(&sema_mtx[i]); mtx_lock(&sema_mtx[i]);
if ((sema[i].u.sem_perm.mode & SEM_ALLOC) == 0 || if ((sema[i].u.sem_perm.mode & SEM_ALLOC) == 0 ||
rpr == NULL || sem_prison_cansee(rpr, &sema[i]) != 0) rpr == NULL || sem_prison_cansee(rpr, &sema[i]) != 0)
bzero(&tsemak, sizeof(tsemak)); bzero(&tsemak, sizeof(tsemak));
else { else {
tsemak = sema[i]; tsemak = sema[i];
if (tsemak.cred->cr_prison != pr) if (tsemak.cred->cr_prison != pr)
tsemak.u.sem_perm.key = IPC_PRIVATE; tsemak.u.sem_perm.key = IPC_PRIVATE;
} }
mtx_unlock(&sema_mtx[i]); mtx_unlock(&sema_mtx[i]);
error = SYSCTL_OUT(req, &tsemak, sizeof(tsemak)); #ifdef COMPAT_FREEBSD32
if (SV_CURPROC_FLAG(SV_ILP32)) {
bzero(&tsemak32, sizeof(tsemak32));
freebsd32_ipcperm_out(&tsemak.u.sem_perm,
&tsemak32.u.sem_perm);
/* Don't copy u.sem_base */
CP(tsemak, tsemak32, u.sem_nsems);
CP(tsemak, tsemak32, u.sem_otime);
CP(tsemak, tsemak32, u.sem_ctime);
/* Don't copy label or cred */
outaddr = &tsemak32;
outsize = sizeof(tsemak32);
} else
#endif
{
tsemak.u.sem_base = NULL;
tsemak.label = NULL;
tsemak.cred = NULL;
outaddr = &tsemak;
outsize = sizeof(tsemak);
}
error = SYSCTL_OUT(req, outaddr, outsize);
if (error != 0) if (error != 0)
break; break;
} }
return (error); return (error);
} }
static int static int
sem_prison_check(void *obj, void *data) sem_prison_check(void *obj, void *data)
▲ Show 20 Lines • Show All 460 Lines • Show Last 20 Lines