ntdll: Maintain a file descriptor cache on the client side.

dlls/ntdll/file.c

@@ -1093,7 +1093,7 @@ NTSTATUS WINAPI NtFsControlFile(HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc
         {
             req->handle = handle;
             io->u.Status = wine_server_call(req);
-            if (!io->u.Status && reply->fd != -1) close(reply->fd);
+            if (!io->u.Status) server_remove_fd_from_cache( handle );
         }
         SERVER_END_REQ;
         break;

dlls/ntdll/ntdll_misc.h

@@ -61,6 +61,7 @@ extern void DECLSPEC_NORETURN server_protocol_error( const char *err, ... );
 extern void DECLSPEC_NORETURN server_protocol_perror( const char *err );
 extern void DECLSPEC_NORETURN server_exit_thread( int status );
 extern void DECLSPEC_NORETURN server_abort_thread( int status );
+extern int server_remove_fd_from_cache( obj_handle_t handle );
 
 /* module handling */
 extern NTSTATUS MODULE_DllThreadAttach( LPVOID lpReserved );

dlls/ntdll/om.c

@@ -312,7 +312,10 @@ NTSTATUS WINAPI NtDuplicateObject( HANDLE source_process, HANDLE source,
         if (!(ret = wine_server_call( req )))
         {
             if (dest) *dest = reply->handle;
-            if (reply->fd != -1) close( reply->fd );
+            if (reply->closed)
+                server_remove_fd_from_cache( source );
+            else if (options & DUPLICATE_CLOSE_SOURCE)
+                WARN( "failed to close handle %p in process %p\n", source, source_process );
         }
     }
     SERVER_END_REQ;
@@ -338,7 +341,7 @@ NTSTATUS WINAPI NtClose( HANDLE Handle )
     {
         req->handle = Handle;
         ret = wine_server_call( req );
-        if (!ret && reply->fd != -1) close( reply->fd );
+        if (!ret) server_remove_fd_from_cache( Handle );
     }
     SERVER_END_REQ;
     return ret;

dlls/ntdll/server.c

@@ -438,6 +438,92 @@ static int receive_fd( obj_handle_t *handle )
 }
 
 
+inline static unsigned int handle_to_index( obj_handle_t handle )
+{
+    return ((unsigned long)handle >> 2) - 1;
+}
+
+static int *fd_cache;
+static unsigned int fd_cache_size;
+
+/***********************************************************************
+ *           add_fd_to_cache
+ *
+ * Caller must hold fd_cache_section.
+ */
+static int add_fd_to_cache( obj_handle_t handle, int fd )
+{
+    unsigned int idx = handle_to_index( handle );
+
+    if (idx >= fd_cache_size)
+    {
+        unsigned int i, size = max( 32, fd_cache_size * 2 );
+        int *new_cache;
+
+        if (size <= idx) size = idx + 1;
+        if (fd_cache)
+            new_cache = RtlReAllocateHeap( GetProcessHeap(), 0, fd_cache, size*sizeof(fd_cache[0]) );
+        else
+            new_cache = RtlAllocateHeap( GetProcessHeap(), 0, size*sizeof(fd_cache[0]) );
+
+        if (new_cache)
+        {
+            for (i = fd_cache_size; i < size; i++) new_cache[i] = -1;
+            fd_cache = new_cache;
+            fd_cache_size = size;
+        }
+    }
+    if (idx < fd_cache_size)
+    {
+        assert( fd_cache[idx] == -1 );
+        fd_cache[idx] = fd;
+        TRACE("added %p (%d) to cache\n", handle, fd );
+        return 1;
+    }
+    return 0;
+}
+
+
+/***********************************************************************
+ *           get_cached_fd
+ *
+ * Caller must hold fd_cache_section.
+ */
+static inline int get_cached_fd( obj_handle_t handle )
+{
+    unsigned int idx = handle_to_index( handle );
+    int fd = -1;
+
+    if (idx < fd_cache_size) fd = fd_cache[idx];
+    return fd;
+}
+
+
+/***********************************************************************
+ *           server_remove_fd_from_cache
+ */
+int server_remove_fd_from_cache( obj_handle_t handle )
+{
+    unsigned int idx = handle_to_index( handle );
+    int fd = -1;
+
+    RtlEnterCriticalSection( &fd_cache_section );
+    if (idx < fd_cache_size)
+    {
+        fd = fd_cache[idx];
+        fd_cache[idx] = -1;
+    }
+    RtlLeaveCriticalSection( &fd_cache_section );
+
+    if (fd != -1)
+    {
+        close( fd );
+        TRACE("removed %p (%d) from cache\n", handle, fd );
+    }
+    return fd;
+}
+
+
 /***********************************************************************
  *           wine_server_fd_to_handle   (NTDLL.@)
  *
@@ -488,20 +574,27 @@ int wine_server_fd_to_handle( int fd, unsigned int access, unsigned int attribut
 int wine_server_handle_to_fd( obj_handle_t handle, unsigned int access, int *unix_fd, int *flags )
 {
     obj_handle_t fd_handle;
-    int ret, removable = -1, fd = -1;
+    int ret = 0, removable = 0, fd = -1;
 
     RtlEnterCriticalSection( &fd_cache_section );
 
     *unix_fd = -1;
 
+    fd = get_cached_fd( handle );
+    if (fd != -1 && !flags)
+    {
+        if ((fd = dup(fd)) == -1) ret = FILE_GetNtStatus();
+        goto done;
+    }
+
     SERVER_START_REQ( get_handle_fd )
     {
         req->handle = handle;
         req->access = access;
+        req->cached = (fd != -1);
         if (!(ret = wine_server_call( req )))
         {
-            fd = reply->fd;
-            removable = reply->removable;
+            removable = reply->flags & FD_FLAG_REMOVABLE;
             if (flags) *flags = reply->flags;
         }
     }
@@ -525,26 +618,10 @@ int wine_server_handle_to_fd( obj_handle_t handle, unsigned int access, int *uni
 
     if (removable) goto done;  /* don't cache it */
 
-    /* and store it back into the cache */
-    SERVER_START_REQ( set_handle_fd )
+    if (add_fd_to_cache( handle, fd ))
     {
-        req->handle    = fd_handle;
-        req->fd        = fd;
-        if (!(ret = wine_server_call( req )))
-        {
-            if (reply->cur_fd != -1) /* it has been cached */
-            {
-                if (reply->cur_fd != fd) close( fd );  /* someone was here before us */
-                if ((fd = dup(reply->cur_fd)) == -1) ret = FILE_GetNtStatus();
-            }
-        }
-        else
-        {
-            close( fd );
-            fd = -1;
-        }
+        if ((fd = dup(fd)) == -1) ret = FILE_GetNtStatus();
     }
-    SERVER_END_REQ;
 
 done:
     RtlLeaveCriticalSection( &fd_cache_section );

include/wine/server_protocol.h

@@ -585,7 +585,7 @@ struct dup_handle_reply
 {
     struct reply_header __header;
     obj_handle_t handle;
-    int          fd;
+    int          closed;
 };
 #define DUP_HANDLE_CLOSE_SOURCE  DUPLICATE_CLOSE_SOURCE
 #define DUP_HANDLE_SAME_ACCESS   DUPLICATE_SAME_ACCESS
@@ -840,12 +840,11 @@ struct get_handle_fd_request
     struct request_header __header;
     obj_handle_t handle;
     unsigned int access;
+    int          cached;
 };
 struct get_handle_fd_reply
 {
     struct reply_header __header;
-    int          fd;
-    int          removable;
     int          flags;
 };
 #define FD_FLAG_OVERLAPPED         0x01
@@ -854,6 +853,7 @@ struct get_handle_fd_reply
 #define FD_FLAG_SEND_SHUTDOWN      0x08
 #define FD_FLAG_AVAILABLE          0x10 /* in overlap read/write operation,
                                          * only handle available data (don't wait) */
+#define FD_FLAG_REMOVABLE          0x20
 
 
 struct set_handle_fd_request
@@ -4425,6 +4425,6 @@ union generic_reply
     struct query_symlink_reply query_symlink_reply;
 };
 
-#define SERVER_PROTOCOL_VERSION 256
+#define SERVER_PROTOCOL_VERSION 257
 
 #endif /* __WINE_WINE_SERVER_PROTOCOL_H */

server/fd.c

@@ -1944,19 +1944,15 @@ DECL_HANDLER(get_handle_fd)
 {
     struct fd *fd;
 
-    reply->fd = -1;
-
     if ((fd = get_handle_fd_obj( current->process, req->handle, req->access )))
     {
-        int unix_fd = get_unix_fd( fd );
-        if (unix_fd != -1)
+        if (!req->cached)
         {
-            int cached_fd = get_handle_unix_fd( current->process, req->handle, req->access );
-            if (cached_fd != -1) reply->fd = cached_fd;
-            else if (!get_error()) send_client_fd( current->process, unix_fd, req->handle );
+            int unix_fd = get_unix_fd( fd );
+            if (unix_fd != -1) send_client_fd( current->process, unix_fd, req->handle );
         }
-        if (fd->inode) reply->removable = fd->inode->device->removable;
         reply->flags = fd->fd_ops->get_file_info( fd );
+        if (fd->inode && fd->inode->device->removable) reply->flags |= FD_FLAG_REMOVABLE;
         release_object( fd );
     }
 }

server/handle.c

@@ -562,7 +562,6 @@ DECL_HANDLER(dup_handle)
     struct process *src, *dst;
 
     reply->handle = 0;
-    reply->fd = -1;
     if ((src = get_process_from_handle( req->src_process, PROCESS_DUP_HANDLE )))
     {
         if (req->options & DUP_HANDLE_MAKE_GLOBAL)
@@ -579,8 +578,9 @@ DECL_HANDLER(dup_handle)
         /* close the handle no matter what happened */
         if (req->options & DUP_HANDLE_CLOSE_SOURCE)
         {
-            if (src == current->process) close_handle( src, req->src_handle, &reply->fd );
-            else close_handle( src, req->src_handle, NULL );
+            unsigned int err = get_error();  /* don't overwrite error from the above calls */
+            reply->closed = close_handle( src, req->src_handle, NULL );
+            set_error( err );
         }
         release_object( src );
     }

server/protocol.def

@@ -485,7 +485,7 @@ enum apc_type { APC_NONE, APC_USER, APC_TIMER, APC_ASYNC_IO };
     unsigned int options;      /* duplicate options (see below) */
 @REPLY
     obj_handle_t handle;       /* duplicated handle in dst process */
-    int          fd;           /* associated fd to close */
+    int          closed;       /* whether the source handle has been closed */
 @END
 #define DUP_HANDLE_CLOSE_SOURCE  DUPLICATE_CLOSE_SOURCE
 #define DUP_HANDLE_SAME_ACCESS   DUPLICATE_SAME_ACCESS
@@ -661,9 +661,8 @@ enum event_op { PULSE_EVENT, SET_EVENT, RESET_EVENT };
 @REQ(get_handle_fd)
     obj_handle_t handle;        /* handle to the file */
     unsigned int access;        /* wanted access rights */
+    int          cached;        /* is it cached on the client already? */
 @REPLY
-    int          fd;            /* file descriptor */
-    int          removable;     /* is device removable? (-1 if unknown) */
     int          flags;         /* file read/write flags (see below) */
 @END
 #define FD_FLAG_OVERLAPPED         0x01 /* fd opened in overlapped mode */
@@ -672,6 +671,7 @@ enum event_op { PULSE_EVENT, SET_EVENT, RESET_EVENT };
 #define FD_FLAG_SEND_SHUTDOWN      0x08
 #define FD_FLAG_AVAILABLE          0x10 /* in overlap read/write operation, 
                                          * only handle available data (don't wait) */
+#define FD_FLAG_REMOVABLE          0x20 /* is it on a removable device? */
 
 /* Set the cached file descriptor of a handle */
 @REQ(set_handle_fd)

server/trace.c

@@ -901,7 +901,7 @@ static void dump_dup_handle_request( const struct dup_handle_request *req )
 static void dump_dup_handle_reply( const struct dup_handle_reply *req )
 {
     fprintf( stderr, " handle=%p,", req->handle );
-    fprintf( stderr, " fd=%d", req->fd );
+    fprintf( stderr, " closed=%d", req->closed );
 }
 
 static void dump_open_process_request( const struct open_process_request *req )
@@ -1103,13 +1103,12 @@ static void dump_alloc_file_handle_reply( const struct alloc_file_handle_reply *
 static void dump_get_handle_fd_request( const struct get_handle_fd_request *req )
 {
     fprintf( stderr, " handle=%p,", req->handle );
-    fprintf( stderr, " access=%08x", req->access );
+    fprintf( stderr, " access=%08x,", req->access );
+    fprintf( stderr, " cached=%d", req->cached );
 }
 
 static void dump_get_handle_fd_reply( const struct get_handle_fd_reply *req )
 {
-    fprintf( stderr, " fd=%d,", req->fd );
-    fprintf( stderr, " removable=%d,", req->removable );
     fprintf( stderr, " flags=%d", req->flags );
 }