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From: Vivek Kasireddy <vivek.kasireddy@intel.com>
To: qemu-devel@nongnu.org
Cc: Vivek Kasireddy <vivek.kasireddy@intel.com>,
	Gerd Hoffmann <kraxel@redhat.com>
Subject: [PATCH 04/11] virtio-gpu: Add virtio_gpu_find_check_resource
Date: Tue, 30 Mar 2021 20:09:54 -0700	[thread overview]
Message-ID: <20210331031001.1564125-5-vivek.kasireddy@intel.com> (raw)
In-Reply-To: <20210331031001.1564125-1-vivek.kasireddy@intel.com>

Move finding the resource and validating its backing storage into one
function.

Based-on-patch-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
---
 hw/display/virtio-gpu.c | 66 +++++++++++++++++++++++++++++------------
 1 file changed, 47 insertions(+), 19 deletions(-)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index c9f5e36fd0..de7462a515 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -35,6 +35,10 @@
 
 static struct virtio_gpu_simple_resource*
 virtio_gpu_find_resource(VirtIOGPU *g, uint32_t resource_id);
+static struct virtio_gpu_simple_resource *
+virtio_gpu_find_check_resource(VirtIOGPU *g, uint32_t resource_id,
+                               bool require_backing,
+                               const char *caller, uint32_t *error);
 
 static void virtio_gpu_cleanup_mapping(VirtIOGPU *g,
                                        struct virtio_gpu_simple_resource *res);
@@ -63,7 +67,8 @@ static void update_cursor_data_simple(VirtIOGPU *g,
     struct virtio_gpu_simple_resource *res;
     uint32_t pixels;
 
-    res = virtio_gpu_find_resource(g, resource_id);
+    res = virtio_gpu_find_check_resource(g, resource_id, false,
+                                         __func__, NULL);
     if (!res) {
         return;
     }
@@ -158,6 +163,37 @@ virtio_gpu_find_resource(VirtIOGPU *g, uint32_t resource_id)
     return NULL;
 }
 
+static struct virtio_gpu_simple_resource *
+virtio_gpu_find_check_resource(VirtIOGPU *g, uint32_t resource_id,
+                               bool require_backing,
+                               const char *caller, uint32_t *error)
+{
+    struct virtio_gpu_simple_resource *res;
+
+    res = virtio_gpu_find_resource(g, resource_id);
+    if (!res) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid resource specified %d\n",
+                      caller, resource_id);
+        if (error) {
+            *error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
+        }
+        return NULL;
+    }
+
+    if (require_backing) {
+        if (!res->iov || !res->image) {
+            qemu_log_mask(LOG_GUEST_ERROR, "%s: no backing storage %d\n",
+                          caller, resource_id);
+            if (error) {
+                *error = VIRTIO_GPU_RESP_ERR_UNSPEC;
+            }
+            return NULL;
+        }
+    }
+
+    return res;
+}
+
 void virtio_gpu_ctrl_response(VirtIOGPU *g,
                               struct virtio_gpu_ctrl_command *cmd,
                               struct virtio_gpu_ctrl_hdr *resp,
@@ -396,11 +432,9 @@ static void virtio_gpu_transfer_to_host_2d(VirtIOGPU *g,
     virtio_gpu_t2d_bswap(&t2d);
     trace_virtio_gpu_cmd_res_xfer_toh_2d(t2d.resource_id);
 
-    res = virtio_gpu_find_resource(g, t2d.resource_id);
-    if (!res || !res->iov) {
-        qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
-                      __func__, t2d.resource_id);
-        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
+    res = virtio_gpu_find_check_resource(g, t2d.resource_id, true,
+                                         __func__, &cmd->error);
+    if (!res) {
         return;
     }
 
@@ -454,11 +488,9 @@ static void virtio_gpu_resource_flush(VirtIOGPU *g,
     trace_virtio_gpu_cmd_res_flush(rf.resource_id,
                                    rf.r.width, rf.r.height, rf.r.x, rf.r.y);
 
-    res = virtio_gpu_find_resource(g, rf.resource_id);
+    res = virtio_gpu_find_check_resource(g, rf.resource_id, false,
+                                         __func__, &cmd->error);
     if (!res) {
-        qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
-                      __func__, rf.resource_id);
-        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
         return;
     }
 
@@ -541,11 +573,9 @@ static void virtio_gpu_set_scanout(VirtIOGPU *g,
     }
 
     /* create a surface for this scanout */
-    res = virtio_gpu_find_resource(g, ss.resource_id);
+    res = virtio_gpu_find_check_resource(g, ss.resource_id, true,
+                                         __func__, &cmd->error);
     if (!res) {
-        qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
-                      __func__, ss.resource_id);
-        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
         return;
     }
 
@@ -737,11 +767,9 @@ virtio_gpu_resource_detach_backing(VirtIOGPU *g,
     virtio_gpu_bswap_32(&detach, sizeof(detach));
     trace_virtio_gpu_cmd_res_back_detach(detach.resource_id);
 
-    res = virtio_gpu_find_resource(g, detach.resource_id);
-    if (!res || !res->iov) {
-        qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal resource specified %d\n",
-                      __func__, detach.resource_id);
-        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID;
+    res = virtio_gpu_find_check_resource(g, detach.resource_id, true,
+                                         __func__, &cmd->error);
+    if (!res) {
         return;
     }
     virtio_gpu_cleanup_mapping(g, res);
-- 
2.26.2



  parent reply	other threads:[~2021-03-31  3:25 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-31  3:09 [PATCH 00/11] Add support for Blob resources feature Vivek Kasireddy
2021-03-31  3:09 ` [PATCH 01/11] ui: Get the fd associated with udmabuf driver Vivek Kasireddy
2021-03-31  3:09 ` [PATCH 02/11] ui/pixman: Add qemu_pixman_to_drm_format() Vivek Kasireddy
2021-03-31  3:09 ` [PATCH 03/11] virtio-gpu: Add udmabuf helpers Vivek Kasireddy
2021-03-31  3:09 ` Vivek Kasireddy [this message]
2021-03-31  3:09 ` [PATCH 05/11] virtio-gpu: Refactor virtio_gpu_set_scanout Vivek Kasireddy
2021-03-31  3:09 ` [PATCH 06/11] virtio-gpu: Refactor virtio_gpu_create_mapping_iov Vivek Kasireddy
2021-03-31  3:09 ` [PATCH 07/11] virtio-gpu: Add initial definitions for blob resources Vivek Kasireddy
2021-03-31  3:09 ` [PATCH 08/11] virtio-gpu: Add virtio_gpu_resource_create_blob Vivek Kasireddy
2021-03-31  3:09 ` [PATCH 09/11] virtio-gpu: Add helpers to create and destroy dmabuf objects Vivek Kasireddy
2021-03-31  3:10 ` [PATCH 10/11] virtio-gpu: Add virtio_gpu_set_scanout_blob Vivek Kasireddy
2021-03-31  3:10 ` [PATCH 11/11] virtio-gpu: Update cursor data using blob Vivek Kasireddy
2021-03-31  3:45 ` [PATCH 00/11] Add support for Blob resources feature no-reply
2021-03-31  5:18 ` Zhang, Tina
2021-04-13  6:10 ` Kasireddy, Vivek
2021-04-14  9:45   ` Gerd Hoffmann
2021-04-14 21:26     ` Kasireddy, Vivek
2021-04-15  7:43       ` Gerd Hoffmann
2021-04-16  6:33         ` Kasireddy, Vivek
2021-04-16  7:56           ` Gerd Hoffmann

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