File bdrv_open2_flags_2.patch of Package xen.16822

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File bdrv_open2_flags_2.patch of Package xen.16822

Index: xen-4.5.0-testing/tools/qemu-xen-traditional-dir-remote/xenstore.c
===================================================================
--- xen-4.5.0-testing.orig/tools/qemu-xen-traditional-dir-remote/xenstore.c
+++ xen-4.5.0-testing/tools/qemu-xen-traditional-dir-remote/xenstore.c
@@ -134,7 +134,8 @@ static void insert_media(void *opaque)
             else 
                 format = &bdrv_raw;
 
-            bdrv_open2(bs, media_filename[i], 0, format);
+            /* Temporary BDRV_O_RDWR */
+            bdrv_open2(bs, media_filename[i], BDRV_O_RDWR, format);
 #ifdef CONFIG_STUBDOM
             {
                 char *buf, *backend, *params_path, *params;
@@ -509,7 +510,8 @@ void xenstore_parse_domain_config(int hv
     }
         
     for (i = 0; i < num; i++) {
-	format = NULL; /* don't know what the format is yet */
+        flags = 0;
+        format = NULL; /* don't know what the format is yet */
         /* read the backend path */
         xenstore_get_backend_path(&bpath, "vbd", danger_path, hvm_domid, e_danger[i]);
         if (bpath == NULL)
@@ -595,6 +597,17 @@ void xenstore_parse_domain_config(int hv
 	    format = &bdrv_raw;
         }
 
+        /* read the mode of the device */
+        if (pasprintf(&buf, "%s/mode", bpath) == -1)
+            continue;
+        free(mode);
+        mode = xs_read(xsh, XBT_NULL, buf, &len);
+
+        if (!strcmp(mode, "r") || !strcmp(mode, "ro"))
+            flags |= BDRV_O_RDONLY;
+        if (!strcmp(mode, "w") || !strcmp(mode, "rw"))
+            flags |= BDRV_O_RDWR;
+
 #if 0
 	/* Phantom VBDs are disabled because the use of paths
 	 * from guest-controlled areas in xenstore is unsafe.
@@ -662,7 +675,7 @@ void xenstore_parse_domain_config(int hv
 #ifdef CONFIG_STUBDOM
         if (pasprintf(&danger_buf, "%s/device/vbd/%s", danger_path, e_danger[i]) == -1)
             continue;
-	if (bdrv_open2(bs, danger_buf, BDRV_O_CACHE_WB /* snapshot and write-back */, &bdrv_raw) == 0) {
+	if (bdrv_open2(bs, danger_buf, flags|BDRV_O_CACHE_WB /* snapshot and write-back */, &bdrv_raw) == 0) {
         if (pasprintf(&buf, "%s/params", bpath) == -1)
                 continue;
         free(params);

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File bdrv_open2_flags_2.patch of Package xen.16822

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