/** Revoke capabilities from a task (32 bits)
*
* The calling task must have the CAP_CAP capability or the caller must
* attempt to revoke capabilities from itself.
*
* @param uspace_taskid User-space pointer to destination task ID.
* @param caps Capabilities to revoke.
*
* @return Zero on success or an error code from @ref errno.h.
*
*/
sysarg_t sys_cap_revoke(sysarg64_t *uspace_taskid, cap_t caps)
{
sysarg64_t taskid;
int rc = copy_from_uspace(&taskid, uspace_taskid, sizeof(sysarg64_t));
if (rc != 0)
return (sysarg_t) rc;
return cap_revoke((task_id_t) taskid, caps);
}
static void destroy_caps(void)
{
errval_t err;
for (int i=0; i<CAPS_PER_CORE; i++) {
err = cap_destroy(retyped_caps[i]);
err = cap_revoke(my_caps[i]);
if (err_is_fail(err)) {
DEBUG_ERR(err, "xcorecap: Retype to frame failed\n");
}
}
}
static void cleanup_cap(struct capref cap)
{
errval_t err;
err = cap_revoke(cap);
if (err_is_fail(err)) {
DEBUG_ERR(err, "cap_revoke");
}
err = cap_destroy(cap);
if (err_is_fail(err)) {
DEBUG_ERR(err, "cap_revoke");
}
}
static void revoke_cap(struct xcorecap_binding *b)
{
errval_t err;
printf("xcorecapserv do revoke cap\n");
err = cap_revoke(sent_cap);
if (err_is_fail(err)) {
DEBUG_ERR(err, "xcorecapserv: revoke failed\n");
}
printf("xcorecapserv revoked cap\n");
fflush(stdout);
b->tx_vtbl.send_done(b, NOP_CONT);
}
/**
* \brief frees up the resources used by the ring.
*
* \param ring the descriptor ring to be freed
*
* \returns SYS_ERR_OK on success
*/
errval_t xeon_phi_dma_desc_ring_free(struct xdma_ring *ring)
{
errval_t err;
if (capref_is_null(ring->cap)) {
return SYS_ERR_OK;
}
if (ring->vbase) {
vspace_unmap(ring->vbase);
}
err = cap_revoke(ring->cap);
if (err_is_fail(err)) {
DEBUG_ERR(err, "revokation of ring cap failed\n");
}
return cap_destroy(ring->cap);
}
/** Revoke capabilities from a task (64 bits)
*
* The calling task must have the CAP_CAP capability or the caller must
* attempt to revoke capabilities from itself.
*
* @param taskid Destination task ID.
* @param caps Capabilities to revoke.
*
* @return Zero on success or an error code from @ref errno.h.
*
*/
sysarg_t sys_cap_revoke(sysarg_t taskid, cap_t caps)
{
return cap_revoke((task_id_t) taskid, caps);
}