From 5c3fe524e192c878278c650c337b52044daf144a Mon Sep 17 00:00:00 2001
From: Tiago Vignatti <tiago.vignatti@intel.com>
Date: Wed, 21 Aug 2013 21:23:09 -0700
Subject: [PATCH 10/30] dri2: Introduce a third version of the AuthMagic
 function

This most recent version takes a client pointer to allow xwayland to
asynchronously authenticate a client.
---
 hw/xfree86/dri2/dri2.c    | 12 ++++++++----
 hw/xfree86/dri2/dri2.h    |  7 +++++++
 hw/xfree86/dri2/dri2ext.c | 27 +++++++++++++++++++--------
 3 files changed, 34 insertions(+), 12 deletions(-)

diff --git a/hw/xfree86/dri2/dri2.c b/hw/xfree86/dri2/dri2.c
index 40963c3..8bf0392 100644
--- a/hw/xfree86/dri2/dri2.c
+++ b/hw/xfree86/dri2/dri2.c
@@ -122,8 +122,9 @@ typedef struct _DRI2Screen {
     DRI2ScheduleSwapProcPtr ScheduleSwap;
     DRI2GetMSCProcPtr GetMSC;
     DRI2ScheduleWaitMSCProcPtr ScheduleWaitMSC;
-    DRI2AuthMagic2ProcPtr AuthMagic;
     DRI2AuthMagicProcPtr LegacyAuthMagic;
+    DRI2AuthMagic2ProcPtr LegacyAuthMagic2;
+    DRI2AuthMagic3ProcPtr AuthMagic;
     DRI2ReuseBufferNotifyProcPtr ReuseBufferNotify;
     DRI2SwapLimitValidateProcPtr SwapLimitValidate;
     DRI2GetParamProcPtr GetParam;
@@ -1369,7 +1370,7 @@ DRI2Authenticate(ClientPtr client, ScreenPtr pScreen, uint32_t magic)
         return FALSE;
 
     primescreen = GetScreenPrime(pScreen, dri2_client->prime_id);
-    if ((*ds->AuthMagic)(primescreen, magic))
+    if ((*ds->AuthMagic)(client, primescreen, magic))
         return FALSE;
     return TRUE;
 }
@@ -1474,8 +1475,11 @@ DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)
         cur_minor = 1;
     }
 
+    if (info->version >= 10) {
+        ds->AuthMagic = info->AuthMagic3;
+    }
     if (info->version >= 8) {
-        ds->AuthMagic = info->AuthMagic2;
+        ds->LegacyAuthMagic2 = info->AuthMagic2;
     }
     if (info->version >= 5) {
         ds->LegacyAuthMagic = info->AuthMagic;
@@ -1514,7 +1518,7 @@ DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info)
          * If the driver doesn't provide an AuthMagic function
          * it relies on the old method (using libdrm) or fails
          */
-        if (!ds->LegacyAuthMagic)
+        if (!ds->LegacyAuthMagic2 && !ds->LegacyAuthMagic)
 #ifdef WITH_LIBDRM
             ds->LegacyAuthMagic = drmAuthMagic;
 #else
diff --git a/hw/xfree86/dri2/dri2.h b/hw/xfree86/dri2/dri2.h
index 1e7afdd..38b4f58 100644
--- a/hw/xfree86/dri2/dri2.h
+++ b/hw/xfree86/dri2/dri2.h
@@ -65,6 +65,8 @@ typedef void (*DRI2CopyRegionProcPtr) (DrawablePtr pDraw,
 typedef void (*DRI2WaitProcPtr) (WindowPtr pWin, unsigned int sequence);
 typedef int (*DRI2AuthMagicProcPtr) (int fd, uint32_t magic);
 typedef int (*DRI2AuthMagic2ProcPtr) (ScreenPtr pScreen, uint32_t magic);
+typedef int (*DRI2AuthMagic3ProcPtr) (ClientPtr client,
+                                      ScreenPtr pScreen, uint32_t magic);
 
 /**
  * Schedule a buffer swap
@@ -252,6 +254,9 @@ typedef struct {
     DRI2CreateBuffer2ProcPtr CreateBuffer2;
     DRI2DestroyBuffer2ProcPtr DestroyBuffer2;
     DRI2CopyRegion2ProcPtr CopyRegion2;
+
+    /* added in version 10 */
+    DRI2AuthMagic3ProcPtr AuthMagic3;
 } DRI2InfoRec, *DRI2InfoPtr;
 
 extern _X_EXPORT Bool DRI2ScreenInit(ScreenPtr pScreen, DRI2InfoPtr info);
@@ -268,6 +273,8 @@ extern _X_EXPORT Bool DRI2Connect(ClientPtr client, ScreenPtr pScreen,
 
 extern _X_EXPORT Bool DRI2Authenticate(ClientPtr client, ScreenPtr pScreen, uint32_t magic);
 
+extern _X_EXPORT void DRI2SendAuthReply(ClientPtr client, Bool status);
+
 extern _X_EXPORT int DRI2CreateDrawable(ClientPtr client,
                                         DrawablePtr pDraw,
                                         XID id,
diff --git a/hw/xfree86/dri2/dri2ext.c b/hw/xfree86/dri2/dri2ext.c
index e1decec..4ab0186 100644
--- a/hw/xfree86/dri2/dri2ext.c
+++ b/hw/xfree86/dri2/dri2ext.c
@@ -136,11 +136,23 @@ ProcDRI2Connect(ClientPtr client)
     return Success;
 }
 
+void
+DRI2SendAuthReply(ClientPtr client, Bool status)
+{
+    xDRI2AuthenticateReply rep = {
+        .type = X_Reply,
+        .sequenceNumber = client->sequence,
+        .length = 0,
+        .authenticated = status
+    };
+
+    WriteToClient(client, sizeof(xDRI2AuthenticateReply), &rep);
+}
+
 static int
 ProcDRI2Authenticate(ClientPtr client)
 {
     REQUEST(xDRI2AuthenticateReq);
-    xDRI2AuthenticateReply rep;
     DrawablePtr pDraw;
     int status;
 
@@ -149,13 +161,12 @@ ProcDRI2Authenticate(ClientPtr client)
                        &pDraw, &status))
         return status;
 
-    rep = (xDRI2AuthenticateReply) {
-        .type = X_Reply,
-        .sequenceNumber = client->sequence,
-        .length = 0,
-        .authenticated = DRI2Authenticate(client, pDraw->pScreen, stuff->magic)
-    };
-    WriteToClient(client, sizeof(xDRI2AuthenticateReply), &rep);
+    status = DRI2Authenticate(client, pDraw->pScreen, stuff->magic);
+
+    /* if non-blocking authentication is in progress, then don't send a reply
+     * now but later in the implementation (e.g. drm_handle_authenticated) */
+    if (client->ignoreCount == 0)
+        DRI2SendAuthReply(client, status);
 
     return Success;
 }
-- 
1.8.3.1