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-rw-r--r--src/fs/ntapi_tt_mount.c358
1 files changed, 358 insertions, 0 deletions
diff --git a/src/fs/ntapi_tt_mount.c b/src/fs/ntapi_tt_mount.c
new file mode 100644
index 0000000..1718750
--- /dev/null
+++ b/src/fs/ntapi_tt_mount.c
@@ -0,0 +1,358 @@
+/********************************************************/
+/* ntapi: Native API core library */
+/* Copyright (C) 2013,2014,2015 Z. Gilboa */
+/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
+/********************************************************/
+
+#include <ntapi/nt_object.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_mount.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+typedef enum __dos_drive_handle_type {
+ __DOS_DRIVE_DEVICE_HANDLE,
+ __DOS_DRIVE_ROOT_HANDLE
+} _dos_drive_handle_type;
+
+typedef struct __dos_name_buffer {
+ wchar16_t global_prefix[4];
+ wchar16_t dos_letter;
+ wchar16_t colon;
+ wchar16_t root;
+ wchar16_t null_termination;
+} _dos_name_buffer;
+
+
+static int32_t __stdcall __tt_connect_to_mount_point_manager(void)
+{
+ int32_t status;
+
+ void * hdev;
+ void * hdev_prev;
+ nt_oa oa;
+ nt_iosb iosb;
+ nt_unicode_string dev_name;
+ uint16_t dev_name_buffer[] = {
+ '\\','?','?','\\',
+ 'M','o','u','n','t',
+ 'P','o','i','n','t',
+ 'M','a','n','a','g','e','r',0};
+
+ dev_name.strlen = sizeof(wchar16_t) * (4+5+5+7);
+ dev_name.maxlen = 0;
+ dev_name.buffer = dev_name_buffer;
+
+ oa.len = sizeof(nt_oa);
+ oa.root_dir = (void *)0;
+ oa.obj_name = &dev_name;
+ oa.obj_attr = NT_OBJ_CASE_INSENSITIVE;
+ oa.sec_desc = (nt_sd *)0;
+ oa.sec_qos = (nt_sqos *)0;
+
+ status = __ntapi->zw_create_file(
+ &hdev,
+ NT_SEC_SYNCHRONIZE | NT_FILE_READ_ATTRIBUTES,
+ &oa,
+ &iosb,
+ 0,
+ NT_FILE_ATTRIBUTE_NORMAL,
+ NT_FILE_SHARE_READ | NT_FILE_SHARE_WRITE,
+ NT_FILE_OPEN,
+ NT_FILE_NON_DIRECTORY_FILE | NT_FILE_SYNCHRONOUS_IO_NONALERT,
+ (void *)0,
+ 0);
+
+ if (status != NT_STATUS_SUCCESS)
+ return status;
+
+ hdev_prev = (void *)at_locked_cas(
+ (intptr_t *)&__ntapi_internals()->hdev_mount_point_mgr,
+ 0,(intptr_t)hdev);
+
+ if (hdev_prev)
+ __ntapi->zw_close(hdev);
+
+ return status;
+}
+
+
+static int32_t __stdcall __tt_get_dos_drive_device_or_root_handle(
+ __out void ** hdrive,
+ __in wchar16_t * drive_letter,
+ __in _dos_drive_handle_type handle_type)
+{
+ #define __common_mode (NT_FILE_SYNCHRONOUS_IO_ALERT)
+ #define __common_access (NT_SEC_SYNCHRONIZE \
+ | NT_FILE_READ_ATTRIBUTES)
+
+ int32_t status;
+
+ nt_oa oa;
+ nt_iosb iosb;
+ uint32_t open_flags;
+ uint32_t access_flags;
+ nt_unicode_string dos_name;
+ _dos_name_buffer dos_name_buffer = {
+ {'\\','?','?','\\'},
+ '_',':',0,0};
+
+ if (!hdrive || !drive_letter)
+ return NT_STATUS_INVALID_PARAMETER;
+
+ if ((*drive_letter>='A') && (*drive_letter<='Z'))
+ dos_name_buffer.dos_letter = *drive_letter;
+ else if ((*drive_letter>='a') && (*drive_letter<='z'))
+ dos_name_buffer.dos_letter = *drive_letter + 'A' - 'a';
+ else
+ return NT_STATUS_INVALID_PARAMETER_2;
+
+ dos_name.strlen = ((size_t)(&((_dos_name_buffer *)0)->root));
+ dos_name.maxlen = 0;
+ dos_name.buffer = &(dos_name_buffer.global_prefix[0]);
+
+ switch (handle_type) {
+ case __DOS_DRIVE_DEVICE_HANDLE:
+ open_flags = __common_mode;
+ access_flags = __common_access;
+ break;
+
+ case __DOS_DRIVE_ROOT_HANDLE:
+ open_flags = __common_mode | NT_FILE_DIRECTORY_FILE;
+ access_flags = __common_access | NT_FILE_READ_ACCESS;
+ dos_name_buffer.root = '\\';
+ dos_name.strlen += sizeof(wchar16_t);
+ break;
+ default:
+ open_flags = 0;
+ access_flags = 0;
+ break;
+ }
+
+ oa.len = sizeof(nt_oa);
+ oa.root_dir = (void *)0;
+ oa.obj_name = &dos_name;
+ oa.obj_attr = NT_OBJ_INHERIT;
+ oa.sec_desc = (nt_sd *)0;
+ oa.sec_qos = (nt_sqos *)0;
+
+ status = __ntapi->zw_open_file(
+ hdrive,
+ access_flags,
+ &oa,
+ &iosb,
+ NT_FILE_SHARE_READ | NT_FILE_SHARE_WRITE,
+ open_flags);
+
+ return status;
+}
+
+
+int32_t __stdcall __ntapi_tt_get_dos_drive_device_handle(
+ __out void ** hdevice,
+ __in wchar16_t * drive_letter)
+{
+ return __tt_get_dos_drive_device_or_root_handle(
+ hdevice,
+ drive_letter,
+ __DOS_DRIVE_DEVICE_HANDLE);
+}
+
+
+int32_t __stdcall __ntapi_tt_get_dos_drive_root_handle(
+ __out void ** hroot,
+ __in wchar16_t * drive_letter)
+{
+ return __tt_get_dos_drive_device_or_root_handle(
+ hroot,
+ drive_letter,
+ __DOS_DRIVE_ROOT_HANDLE);
+}
+
+
+
+int32_t __stdcall __ntapi_tt_get_dos_drive_device_name(
+ __in void * hdevice __optional,
+ __in wchar16_t * drive_letter __optional,
+ __out nt_mount_dev_name * buffer,
+ __in uint32_t buffer_size)
+{
+ int32_t status;
+ nt_iosb iosb;
+
+ if (!hdevice && (status = __tt_get_dos_drive_device_or_root_handle(
+ &hdevice,
+ drive_letter,
+ __DOS_DRIVE_DEVICE_HANDLE)))
+ return status;
+
+ return __ntapi->zw_device_io_control_file(
+ hdevice,
+ (void *)0,
+ (nt_io_apc_routine *)0,
+ (void *)0,
+ &iosb,
+ NT_IOCTL_MOUNTDEV_QUERY_DEVICE_NAME,
+ (void *)0,
+ 0,
+ buffer,
+ buffer_size);
+}
+
+
+int32_t __stdcall __ntapi_tt_get_dos_drive_mount_points(
+ __in void * hdevice __optional,
+ __in wchar16_t * drive_letter __optional,
+ __in nt_mount_dev_name * dev_name __optional,
+ __out void * buffer,
+ __in uint32_t buffer_size)
+{
+ int32_t status;
+ nt_iosb iosb;
+ wchar16_t dev_name_buffer[64];
+ nt_mount_point_param * dev_mount_point;
+ nt_mount_points * dev_mount_points;
+ uintptr_t addr;
+
+ if (!dev_name) {
+ dev_name = (nt_mount_dev_name *)&dev_name_buffer;
+ if ((status = __ntapi_tt_get_dos_drive_device_name(
+ hdevice,
+ drive_letter,
+ dev_name,
+ sizeof(dev_name_buffer))))
+ return status;
+ }
+
+ if (buffer_size < sizeof(nt_mount_mgr_mount_point) \
+ + sizeof(nt_mount_dev_name) \
+ + sizeof(dev_name->name_length))
+ return NT_STATUS_BUFFER_TOO_SMALL;
+
+ dev_mount_point = (nt_mount_point_param *)buffer;
+ dev_mount_point->symlink_name_offset = 0;
+ dev_mount_point->symlink_name_length = 0;
+ dev_mount_point->unique_id_offset = 0;
+ dev_mount_point->unique_id_length = 0;
+ dev_mount_point->device_name_offset = ((size_t)(&((nt_mount_point_param *)0)->device_name));
+ dev_mount_point->device_name_length = dev_name->name_length;
+ dev_mount_point->mount_points_offset = 0;
+
+ __ntapi->tt_memcpy_utf16(
+ dev_mount_point->device_name,
+ dev_name->name,
+ dev_name->name_length);
+
+ addr = (uintptr_t)(dev_mount_point->device_name) + dev_name->name_length;
+ addr += sizeof(uintptr_t) - 1;
+ addr /= sizeof(uintptr_t);
+ addr *= sizeof(uintptr_t);
+ dev_mount_points = (nt_mount_points *)addr;
+
+
+ if (!__ntapi_internals()->hdev_mount_point_mgr)
+ status = __tt_connect_to_mount_point_manager();
+
+ if (!__ntapi_internals()->hdev_mount_point_mgr)
+ return status;
+
+
+ status = __ntapi->zw_device_io_control_file(
+ __ntapi_internals()->hdev_mount_point_mgr,
+ (void *)0,
+ (nt_io_apc_routine *)0,
+ (void *)0,
+ &iosb,
+ NT_IOCTL_MOUNTMGR_QUERY_POINTS,
+ dev_mount_point,
+ (uint32_t)(uintptr_t)&(((nt_mount_point_param *)0)->device_name) + dev_name->name_length,
+ dev_mount_points,
+ (uint32_t)((uintptr_t)buffer + buffer_size - addr));
+
+ dev_mount_point->mount_points_offset = (uint16_t)((uintptr_t)addr - (uintptr_t)buffer);
+
+ return status;
+}
+
+
+int32_t __stdcall __ntapi_tt_dev_mount_points_to_statfs(
+ __in nt_mount_points * mount_points,
+ __in_out nt_statfs * statfs)
+{
+ int32_t status;
+ uint32_t hash;
+ uint32_t i;
+
+ nt_mount_mgr_mount_point * mount_point;
+ char * symlink;
+
+ mount_point = mount_points->mount_points;
+ statfs->nt_drive_letter = 0;
+
+
+ for (i = 0; i < mount_points->number; i++, mount_point++) {
+ symlink = (char *)mount_points + mount_point->symlink_name_offset;
+
+ /* both prefixes of interest happen to be of the same length */
+ hash = __ntapi->tt_buffer_crc32(
+ 0, symlink, __DOS_DEVICES_PREFIX_LEN);
+
+ if (hash == __DOS_DEVICES_PREFIX_HASH)
+ statfs->nt_drive_letter = ((nt_dos_devices_name *)(symlink))->letter;
+ else if (hash == __VOLUME_PATH_PREFIX_HASH) {
+ status = __ntapi_tt_utf16_string_to_guid(
+ (nt_guid_str_utf16 *)(symlink \
+ + __VOLUME_PATH_PREFIX_LEN \
+ - sizeof(wchar16_t)),
+ &statfs->nt_volume_guid);
+
+ if (status != NT_STATUS_SUCCESS)
+ return status;
+ }
+ }
+
+ return 0;
+}
+
+
+int32_t __stdcall __ntapi_tt_get_dos_drive_letter_from_device(
+ __in void * hdevice __optional,
+ __out wchar16_t * drive_letter,
+ __in nt_mount_dev_name * dev_name __optional,
+ __out void * buffer,
+ __in uint32_t buffer_size)
+{
+ int32_t status;
+ wchar16_t dev_name_buffer[128];
+ nt_statfs statfs;
+ uint32_t offset;
+ nt_mount_points * mnt_points;
+
+ if (!dev_name) {
+ dev_name = (nt_mount_dev_name *)&dev_name_buffer;
+ status = __ntapi_tt_get_dos_drive_device_name(
+ hdevice,
+ (wchar16_t *)0,
+ dev_name,
+ sizeof(dev_name_buffer));
+
+ if (status != NT_STATUS_SUCCESS)
+ return status;
+ }
+
+
+ offset = ((nt_mount_point_param *)buffer)->mount_points_offset;
+ mnt_points = (nt_mount_points *)((uintptr_t)buffer + offset);
+
+ status = __ntapi_tt_dev_mount_points_to_statfs(
+ mnt_points,
+ &statfs);
+
+ if (status != NT_STATUS_SUCCESS)
+ return status;
+
+ *drive_letter = statfs.nt_drive_letter;
+
+ return status;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 01:39:12 +0000