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/********************************************************/
/* ntapi: Native API core library */
/* Copyright (C) 2013--2016 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
/********************************************************/
#include <psxtypes/psxtypes.h>
#include <ntapi/nt_port.h>
#include <ntapi/nt_vmount.h>
#include <ntapi/ntapi.h>
#include "ntapi_impl.h"
typedef struct nt_vms_cache_interface {
nt_vms_system * vms_sys;
struct dalist_ex cache;
size_t alloc_size;
uintptr_t buffer[1];
} nt_vms_cache_context;
typedef struct _nt_vms_cache_record {
void * hfile;
uint32_t dev_name_hash;
nt_large_integer index_number;
intptr_t client_key;
intptr_t server_key;
} nt_vms_cache_record;
int32_t __stdcall __ntapi_vms_cache_free(
__in nt_vms_cache vms_cache)
{
int32_t status;
void * region_addr;
size_t region_size;
/* validation */
if (!vms_cache)
return NT_STATUS_INVALID_PARAMETER;
/* free memory */
region_addr = vms_cache;
region_size = vms_cache->alloc_size;
status = __ntapi->zw_free_virtual_memory(
NT_CURRENT_PROCESS_HANDLE,
®ion_addr,
®ion_size,
NT_MEM_RELEASE);
return status;
}
/* vms optional cache functions */
nt_vms_cache __stdcall __ntapi_vms_cache_alloc(
__in nt_vms_system * vms_sys,
__in uint32_t flags __reserved,
__in void * options __reserved,
__out int32_t * status __optional)
{
int32_t _status;
void * buffer;
size_t buffer_size;
nt_vms_cache_context * vms_cache;
/* status */
if (!status) status = &_status;
/* validation */
if (!vms_sys) {
*status = NT_STATUS_INVALID_PARAMETER;
return (nt_vms_cache)0;
}
/* calculate size */
buffer_size = sizeof(nt_vms_cache_context);
buffer_size += vms_sys->vms_points_cap * (sizeof(nt_vms_cache_record) - sizeof(uintptr_t));
/* allocate buffer */
*status = __ntapi->zw_allocate_virtual_memory(
NT_CURRENT_PROCESS_HANDLE,
&buffer,
0,
&buffer_size,
NT_MEM_COMMIT,
NT_PAGE_READWRITE);
if (*status) return (nt_vms_cache)0;
/* init vms cache */
vms_cache = (nt_vms_cache_context *)buffer;
vms_cache->vms_sys = vms_sys;
vms_cache->alloc_size = buffer_size;
/* init list */
*status = dalist_init_ex(
&vms_cache->cache,
sizeof(nt_vms_cache_record),
0x1000,
__ntapi->zw_allocate_virtual_memory,
DALIST_MEMFN_NT_ALLOCATE_VIRTUAL_MEMORY);
if (*status != DALIST_OK) {
*status = NT_STATUS_UNSUCCESSFUL;
__ntapi_vms_cache_free(vms_cache);
return (nt_vms_cache)0;
}
/* set list buffer */
buffer_size -= (size_t)&(((nt_vms_cache_context *)0)->buffer);
*status = dalist_deposit_memory_block(
&vms_cache->cache,
&vms_cache->buffer,
buffer_size);
return vms_cache;
}
int32_t __stdcall __ntapi_vms_cache_record_append(
__in nt_vms_cache cache,
__in void * hfile,
__in uint32_t dev_name_hash,
__in nt_large_integer index_number,
__in intptr_t client_key,
__in intptr_t server_key)
{
int32_t status;
struct dalist_node_ex * node;
nt_vms_cache_record * cache_record;
status = dalist_get_node_by_key(
&cache->cache,
&node,
(uintptr_t)hfile,
DALIST_NODE_TYPE_EXISTING,
(uintptr_t *)0);
if (status != DALIST_OK)
status = NT_STATUS_INTERNAL_ERROR;
else if (node)
status = NT_STATUS_OBJECTID_EXISTS;
else {
status = dalist_get_free_node(&cache->cache,(void **)&node);
if (status == DALIST_OK) {
cache_record = (nt_vms_cache_record *)&node->dblock;
__ntapi->tt_aligned_block_memset(
node,
0,
(uintptr_t)&((struct dalist_node_ex *)0)->dblock + sizeof(*cache_record));
node->key = (uintptr_t)hfile;
cache_record->hfile = hfile;
cache_record->dev_name_hash = dev_name_hash;
cache_record->index_number.quad = index_number.quad;
cache_record->client_key = client_key;
cache_record->server_key = server_key;
status = dalist_insert_node_by_key(
&cache->cache,
node);
if (status != DALIST_OK)
dalist_deposit_free_node(
&cache->cache,
node);
}
}
return status;
}
int32_t __stdcall __ntapi_vms_cache_record_remove(
__in nt_vms_cache cache,
__in void * hfile,
__in uint32_t dev_name_hash,
__in nt_large_integer index_number)
{
int32_t status;
struct dalist_node_ex * node;
status = dalist_get_node_by_key(
&cache->cache,
&node,
(uintptr_t)hfile,
DALIST_NODE_TYPE_EXISTING,
(uintptr_t *)0);
if (status != DALIST_OK)
status = NT_STATUS_INTERNAL_ERROR;
else if (node)
status = NT_STATUS_INVALID_PARAMETER;
else {
status = dalist_discard_node(
&cache->cache,
node);
if (status != DALIST_OK)
status = NT_STATUS_INTERNAL_ERROR;
}
return status;
}
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