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ntdll: Use a dynamic buffer for change notification data.

This commit is contained in:
André Hentschel 2014-09-22 23:43:26 +02:00 committed by Alexandre Julliard
parent 95763d9146
commit 6d50cfcac2
1 changed files with 7 additions and 4 deletions
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11
dlls/ntdll/directory.c
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@ -3307,8 +3307,10 @@ struct read_changes_info
HANDLE FileHandle;
PVOID Buffer;
ULONG BufferSize;
ULONG data_size;
PIO_APC_ROUTINE apc;
void *apc_arg;
char data[1];
};
/* callback for ioctl user APC */
@ -3322,14 +3324,13 @@ static void WINAPI read_changes_user_apc( void *arg, IO_STATUS_BLOCK *io, ULONG
static NTSTATUS read_changes_apc( void *user, PIO_STATUS_BLOCK iosb, NTSTATUS status, void **apc )
{
struct read_changes_info *info = user;
char data[PATH_MAX];
NTSTATUS ret;
int size;
SERVER_START_REQ( read_change )
{
req->handle = wine_server_obj_handle( info->FileHandle );
wine_server_set_reply( req, data, PATH_MAX );
wine_server_set_reply( req, info->data, info->data_size );
ret = wine_server_call( req );
size = wine_server_reply_size( reply );
}
@ -3340,7 +3341,7 @@ static NTSTATUS read_changes_apc( void *user, PIO_STATUS_BLOCK iosb, NTSTATUS st
PFILE_NOTIFY_INFORMATION pfni = info->Buffer;
int i, left = info->BufferSize;
DWORD *last_entry_offset = NULL;
struct filesystem_event *event = (struct filesystem_event*)data;
struct filesystem_event *event = (struct filesystem_event*)info->data;
while (size && left >= sizeof(*pfni))
{
@ -3413,6 +3414,7 @@ NtNotifyChangeDirectoryFile( HANDLE FileHandle, HANDLE Event,
{
struct read_changes_info *info;
NTSTATUS status;
ULONG size = max( 4096, BufferSize );
ULONG_PTR cvalue = ApcRoutine ? 0 : (ULONG_PTR)ApcContext;
TRACE("%p %p %p %p %p %p %u %u %d\n",
@ -3425,7 +3427,7 @@ NtNotifyChangeDirectoryFile( HANDLE FileHandle, HANDLE Event,
if (CompletionFilter == 0 || (CompletionFilter & ~FILE_NOTIFY_ALL))
return STATUS_INVALID_PARAMETER;
info = RtlAllocateHeap( GetProcessHeap(), 0, sizeof *info );
info = RtlAllocateHeap( GetProcessHeap(), 0, offsetof( struct read_changes_info, data[size] ));
if (!info)
return STATUS_NO_MEMORY;
@ -3434,6 +3436,7 @@ NtNotifyChangeDirectoryFile( HANDLE FileHandle, HANDLE Event,
info->BufferSize = BufferSize;
info->apc = ApcRoutine;
info->apc_arg = ApcContext;
info->data_size = size;
SERVER_START_REQ( read_directory_changes )
{