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Commit 26a37b36 authored by Vladislav Vaintroub's avatar Vladislav Vaintroub
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Bug#47571 : idle named pipe connection is unkillable 

implement Davi's review suggestions (post-push fixes)


include/violite.h:
  Use official abbreviation for milliseconds (ms)
sql/mysqld.cc:
  Fix formatting
  Add error handling for the case of CreateEvent error
vio/vio.c:
  Use official abbreviation for milliseconds(ms)
  Remove superfluous memset
  Fix formatting
vio/viosocket.c:
  Use official abbreviation for milliseconds (ms)
  Use size_t  datatype instead of int in pipe_complete_io
parent 2f78abd2
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Showing with 60 additions and 49 deletions
include/violite.h
View file @ 26a37b36
......@@ -224,8 +224,8 @@ struct st_vio
#endif /* HAVE_SMEM */
#ifdef _WIN32
OVERLAPPED pipe_overlapped;
DWORD read_timeout_millis;
DWORD write_timeout_millis;
DWORD read_timeout_ms;
DWORD write_timeout_ms;
#endif
};
#endif /* vio_violite_h_ */
sql/mysqld.cc
View file @ 26a37b36
......@@ -5224,12 +5224,16 @@ pthread_handler_t handle_connections_sockets(void *arg __attribute__((unused)))
pthread_handler_t handle_connections_namedpipes(void *arg)
{
HANDLE hConnectedPipe;
OVERLAPPED connectOverlapped = {0};
OVERLAPPED connectOverlapped= {0};
THD *thd;
my_thread_init();
DBUG_ENTER("handle_connections_namedpipes");
connectOverlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
connectOverlapped.hEvent= CreateEvent(NULL, TRUE, FALSE, NULL);
if (!connectOverlapped.hEvent)
{
sql_print_error("Can't create event, last error=%u", GetLastError());
unireg_abort(1);
}
DBUG_PRINT("general",("Waiting for named pipe connections."));
while (!abort_loop)
{
......@@ -5252,7 +5256,8 @@ pthread_handler_t handle_connections_namedpipes(void *arg)
{
CloseHandle(hPipe);
if ((hPipe= CreateNamedPipe(pipe_name,
PIPE_ACCESS_DUPLEX|FILE_FLAG_OVERLAPPED,
PIPE_ACCESS_DUPLEX |
FILE_FLAG_OVERLAPPED,
PIPE_TYPE_BYTE |
PIPE_READMODE_BYTE |
PIPE_WAIT,
......@@ -5272,7 +5277,8 @@ pthread_handler_t handle_connections_namedpipes(void *arg)
hConnectedPipe = hPipe;
/* create new pipe for new connection */
if ((hPipe = CreateNamedPipe(pipe_name,
PIPE_ACCESS_DUPLEX|FILE_FLAG_OVERLAPPED,
PIPE_ACCESS_DUPLEX |
FILE_FLAG_OVERLAPPED,
PIPE_TYPE_BYTE |
PIPE_READMODE_BYTE |
PIPE_WAIT,
......
vio/vio.c
View file @ 26a37b36
......@@ -62,10 +62,8 @@ static void vio_init(Vio* vio, enum enum_vio_type type,
vio->timeout=vio_win32_timeout;
/* Set default timeout */
vio->read_timeout_millis = INFINITE;
vio->write_timeout_millis = INFINITE;
memset(&(vio->pipe_overlapped), 0, sizeof(OVERLAPPED));
vio->read_timeout_ms= INFINITE;
vio->write_timeout_ms= INFINITE;
vio->pipe_overlapped.hEvent= CreateEvent(NULL, TRUE, FALSE, NULL);
DBUG_VOID_RETURN;
}
......@@ -90,8 +88,8 @@ static void vio_init(Vio* vio, enum enum_vio_type type,
/* Currently, shared memory is on Windows only, hence the below is ok*/
vio->timeout= vio_win32_timeout;
/* Set default timeout */
vio->read_timeout_millis= INFINITE;
vio->write_timeout_millis= INFINITE;
vio->read_timeout_ms= INFINITE;
vio->write_timeout_ms= INFINITE;
DBUG_VOID_RETURN;
}
#endif
......@@ -115,7 +113,6 @@ static void vio_init(Vio* vio, enum enum_vio_type type,
DBUG_VOID_RETURN;
}
#endif /* HAVE_OPENSSL */
{
vio->viodelete =vio_delete;
vio->vioerrno =vio_errno;
vio->read= (flags & VIO_BUFFERED_READ) ? vio_read_buff : vio_read;
......@@ -130,7 +127,6 @@ static void vio_init(Vio* vio, enum enum_vio_type type,
vio->vioblocking =vio_blocking;
vio->is_blocking =vio_is_blocking;
vio->timeout =vio_timeout;
}
DBUG_VOID_RETURN;
}
......
vio/viosocket.c
View file @ 26a37b36
......@@ -415,14 +415,14 @@ void vio_timeout(Vio *vio, uint which, uint timeout)
/*
Finish pending IO on pipe. Honor wait timeout
*/
static int pipe_complete_io(Vio* vio, char* buf, size_t size, DWORD timeout_millis)
static size_t pipe_complete_io(Vio* vio, char* buf, size_t size, DWORD timeout_ms)
{
DWORD length;
DWORD ret;
DBUG_ENTER("pipe_complete_io");
ret= WaitForSingleObject(vio->pipe_overlapped.hEvent, timeout_millis);
ret= WaitForSingleObject(vio->pipe_overlapped.hEvent, timeout_ms);
/*
WaitForSingleObjects will normally return WAIT_OBJECT_O (success, IO completed)
or WAIT_TIMEOUT.
......@@ -431,14 +431,14 @@ static int pipe_complete_io(Vio* vio, char* buf, size_t size, DWORD timeout_mill
{
CancelIo(vio->hPipe);
DBUG_PRINT("error",("WaitForSingleObject() returned %d", ret));
DBUG_RETURN(-1);
DBUG_RETURN((size_t)-1);
}
if (!GetOverlappedResult(vio->hPipe,&(vio->pipe_overlapped),&length, FALSE))
{
DBUG_PRINT("error",("GetOverlappedResult() returned last error %d",
GetLastError()));
DBUG_RETURN(-1);
DBUG_RETURN((size_t)-1);
}
DBUG_RETURN(length);
......@@ -448,12 +448,17 @@ static int pipe_complete_io(Vio* vio, char* buf, size_t size, DWORD timeout_mill
size_t vio_read_pipe(Vio * vio, uchar *buf, size_t size)
{
DWORD bytes_read;
size_t retval;
DBUG_ENTER("vio_read_pipe");
DBUG_PRINT("enter", ("sd: %d buf: 0x%lx size: %u", vio->sd, (long) buf,
(uint) size));
if (!ReadFile(vio->hPipe, buf, (DWORD)size, &bytes_read,
if (ReadFile(vio->hPipe, buf, (DWORD)size, &bytes_read,
&(vio->pipe_overlapped)))
{
retval= bytes_read;
}
else
{
if (GetLastError() != ERROR_IO_PENDING)
{
......@@ -461,23 +466,28 @@ size_t vio_read_pipe(Vio * vio, uchar *buf, size_t size)
GetLastError()));
DBUG_RETURN((size_t)-1);
}
bytes_read= pipe_complete_io(vio, buf, size,vio->read_timeout_millis);
retval= pipe_complete_io(vio, buf, size,vio->read_timeout_ms);
}
DBUG_PRINT("exit", ("%d", bytes_read));
DBUG_RETURN(bytes_read);
DBUG_PRINT("exit", ("%lld", (longlong)retval));
DBUG_RETURN(retval);
}
size_t vio_write_pipe(Vio * vio, const uchar* buf, size_t size)
{
DWORD bytes_written;
size_t retval;
DBUG_ENTER("vio_write_pipe");
DBUG_PRINT("enter", ("sd: %d buf: 0x%lx size: %u", vio->sd, (long) buf,
(uint) size));
if (!WriteFile(vio->hPipe, buf, (DWORD)size, &bytes_written,
if (WriteFile(vio->hPipe, buf, (DWORD)size, &bytes_written,
&(vio->pipe_overlapped)))
{
retval= bytes_written;
}
else
{
if (GetLastError() != ERROR_IO_PENDING)
{
......@@ -485,12 +495,11 @@ size_t vio_write_pipe(Vio * vio, const uchar* buf, size_t size)
GetLastError()));
DBUG_RETURN((size_t)-1);
}
bytes_written = pipe_complete_io(vio, (char *)buf, size,
vio->write_timeout_millis);
retval= pipe_complete_io(vio, (char *)buf, size, vio->write_timeout_ms);
}
DBUG_PRINT("exit", ("%d", bytes_written));
DBUG_RETURN(bytes_written);
DBUG_PRINT("exit", ("%lld", (longlong)retval));
DBUG_RETURN(retval);
}
......@@ -515,21 +524,21 @@ int vio_close_pipe(Vio * vio)
void vio_win32_timeout(Vio *vio, uint which , uint timeout_sec)
{
DWORD timeout_millis;
DWORD timeout_ms;
/*
Windows is measuring timeouts in milliseconds. Check for possible int
overflow.
*/
if (timeout_sec > UINT_MAX/1000)
timeout_millis= INFINITE;
timeout_ms= INFINITE;
else
timeout_millis= timeout_sec * 1000;
timeout_ms= timeout_sec * 1000;
/* which == 1 means "write", which == 0 means "read".*/
if(which)
vio->write_timeout_millis= timeout_millis;
vio->write_timeout_ms= timeout_ms;
else
vio->read_timeout_millis= timeout_millis;
vio->read_timeout_ms= timeout_ms;
}
......@@ -564,7 +573,7 @@ size_t vio_read_shared_memory(Vio * vio, uchar* buf, size_t size)
WAIT_ABANDONED_0 and WAIT_TIMEOUT - fail. We can't read anything
*/
if (WaitForMultipleObjects(array_elements(events), events, FALSE,
vio->read_timeout_millis) != WAIT_OBJECT_0)
vio->read_timeout_ms) != WAIT_OBJECT_0)
{
DBUG_RETURN(-1);
};
......@@ -621,7 +630,7 @@ size_t vio_write_shared_memory(Vio * vio, const uchar* buf, size_t size)
while (remain != 0)
{
if (WaitForMultipleObjects(array_elements(events), events, FALSE,
vio->write_timeout_millis) != WAIT_OBJECT_0)
vio->write_timeout_ms) != WAIT_OBJECT_0)
{
DBUG_RETURN((size_t) -1);
}
......
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