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nova: use cap_map for IPC

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Issue #905
This commit is contained in:
Alexander Boettcher 2013-09-06 14:44:12 +02:00 committed by Norman Feske
parent 75ecdab9e8
commit c139253439
2 changed files with 46 additions and 51 deletions
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89
base-nova/include/base/ipc_msgbuf.h
View File

@ -21,9 +21,6 @@
#ifndef _INCLUDE__BASE__IPC_MSGBUF_H_
#define _INCLUDE__BASE__IPC_MSGBUF_H_
/* Genode includes */
#include <base/cap_sel_alloc.h>
/* NOVA includes */
#include <nova/syscalls.h>
#include <nova/util.h>
@ -51,11 +48,7 @@ namespace Genode {
/**
* Portal capability selectors to delegate
*/
struct {
addr_t sel;
unsigned rights;
bool trans_map;
} _snd_pt_sel [MAX_CAP_ARGS];
Native_capability _snd_pt_sel [MAX_CAP_ARGS];
/**
* Base of portal receive window
@ -117,20 +110,25 @@ namespace Genode {
/**
* Reset portal capability selector payload
*/
inline void snd_reset() { _snd_pt_sel_cnt = 0; }
inline void snd_reset() {
for (unsigned i = 0; i < MAX_CAP_ARGS; i++) {
+_snd_pt_sel[i];
_snd_pt_sel[i] = Native_capability();
}
_snd_pt_sel_cnt = 0;
}
/**
* Append portal capability selector to message buffer
*/
inline bool snd_append_pt_sel(addr_t pt_sel, unsigned rights,
bool trans_map)
inline bool snd_append_pt_sel(Native_capability const &cap)
{
if (_snd_pt_sel_cnt >= MAX_CAP_ARGS - 1)
return false;
_snd_pt_sel[_snd_pt_sel_cnt ].sel = pt_sel;
_snd_pt_sel[_snd_pt_sel_cnt ].rights = rights;
_snd_pt_sel[_snd_pt_sel_cnt++].trans_map = trans_map;
_snd_pt_sel[_snd_pt_sel_cnt++ ] = cap;
return true;
}
@ -157,9 +155,10 @@ namespace Genode {
if (i >= _snd_pt_sel_cnt)
return Nova::Obj_crd();
trans_map = _snd_pt_sel[i].trans_map;
return Nova::Obj_crd(_snd_pt_sel[i].sel, 0,
_snd_pt_sel[i].rights);
trans_map = _snd_pt_sel[i].trans_map();
return Nova::Obj_crd(_snd_pt_sel[i].local_name(), 0,
_snd_pt_sel[i].dst().rights());
}
/**
@ -194,13 +193,15 @@ namespace Genode {
/**
* Return received portal-capability selector
*/
addr_t rcv_pt_sel()
void rcv_pt_sel(Native_capability &cap)
{
if (_rcv_pt_sel_cnt >= _rcv_pt_sel_max) {
cap = Native_capability();
return;
}
/* return only received or translated caps */
if (_rcv_pt_sel_cnt < _rcv_pt_sel_max)
return _rcv_pt_sel[_rcv_pt_sel_cnt++].sel;
else
return INVALID_INDEX;
cap = Native_capability(_rcv_pt_sel[_rcv_pt_sel_cnt++].sel);
}
/**
@ -245,37 +246,38 @@ namespace Genode {
nova_die();
_rcv_pt_cap_free [_rcv_pt_sel[i].sel - rcv_pt_base()] = USED_CAP;
cap_map()->remove(_rcv_pt_sel[i].sel - rcv_pt_base(), 0);
reinit = true;
}
/* revoke received caps which are unused */
for (unsigned i = 0; i < MAX_CAP_ARGS; i++) {
if (i < new_max && _rcv_pt_cap_free[i] == FREE_INVALID)
/* if old receive window was smaller, we need to re-init */
for (unsigned i = 0; !reinit && i < new_max; i++)
if (_rcv_pt_cap_free[i] == FREE_INVALID)
reinit = true;
if (_rcv_pt_cap_free[i] == UNUSED_CAP)
Nova::revoke(Nova::Obj_crd(rcv_pt_base() + i, 0), true);
}
_rcv_pt_sel_cnt = 0;
_rcv_pt_sel_max = 0;
/* we can keep the cap selectors if none was used */
if (keep && !reinit) {
/* free rest of indexes if new_max is smaller then last window */
for (unsigned i = new_max; i < MAX_CAP_ARGS; i++)
if (_rcv_pt_cap_free[i] == FREE_SEL)
cap_selector_allocator()->free(rcv_pt_base() + i, 0);
for (unsigned i = 0; i < MAX_CAP_ARGS; i++) {
/* revoke received caps which are unused */
if (_rcv_pt_cap_free[i] == UNUSED_CAP)
Nova::revoke(Nova::Obj_crd(rcv_pt_base() + i, 0), true);
/* free rest of indexes if new_max is smaller then last window */
if (i >= new_max && _rcv_pt_cap_free[i] == FREE_SEL)
cap_map()->remove(rcv_pt_base() + i, 0, false);
}
return false;
}
/* keep used selectors, free up rest */
for (unsigned i = 0; i < MAX_CAP_ARGS; i++) {
if (_rcv_pt_cap_free[i] == UNUSED_CAP ||
_rcv_pt_cap_free[i] == FREE_SEL)
cap_selector_allocator()->free(rcv_pt_base() + i, 0);
}
/* decrease ref count if valid selector */
for (unsigned i = 0; i < MAX_CAP_ARGS; i++)
if (_rcv_pt_cap_free[i] != FREE_INVALID)
cap_map()->remove(rcv_pt_base() + i, 0, _rcv_pt_cap_free[i] == FREE_SEL);
return true;
}
@ -316,10 +318,9 @@ namespace Genode {
/* allocate receive window if necessary, otherwise use old one */
if (rcv_invalid() || rcv_cleanup(true, 1U << _rcv_wnd_log2))
{
try {
_rcv_pt_base = cap_selector_allocator()->alloc(_rcv_wnd_log2);
} catch (Bit_array_out_of_indexes) {
_rcv_pt_base = INVALID_INDEX;
_rcv_pt_base = cap_map()->insert(_rcv_wnd_log2);
if (_rcv_pt_base == INVALID_INDEX) {
/* no mappings can be received */
utcb->crd_rcv = Nova::Obj_crd();
return false;
@ -357,8 +358,6 @@ namespace Genode {
for (unsigned short i = 0; i < MAX_CAP_ARGS; i++)
_rcv_pt_cap_free [i] = (i >= max) ? FREE_INVALID : FREE_SEL;
addr_t max = 1UL << utcb->crd_rcv.order();
for (unsigned i = 0; i < rcv_items; i++) {
Utcb::Item * item = utcb->get_item(i);
if (!item)

8
base-nova/src/base/ipc/ipc.cc
View File

@ -30,17 +30,13 @@ using namespace Nova;
void Ipc_ostream::_marshal_capability(Native_capability const &cap)
{
if (cap.valid())
_snd_msg->snd_append_pt_sel(cap.local_name(),
cap.dst().rights(),
cap.trans_map());
_snd_msg->snd_append_pt_sel(cap);
}
void Ipc_istream::_unmarshal_capability(Native_capability &cap)
{
addr_t pt_sel = _rcv_msg->rcv_pt_sel();
cap = Native_capability(pt_sel);
_rcv_msg->rcv_pt_sel(cap);
}