Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

[mirror_qemu.git] / block / qcow2.c

diff --git a/block/qcow2.c b/block/qcow2.c
index cec5bd02f274403aceb3b65ebcc4ee226e804615..470734be9ff17016778a219d20c6c05deb3d035a 100644 (file)
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -22,7 +22,6 @@
  * THE SOFTWARE.
  */
 #include "qemu/osdep.h"
-#include "qemu-common.h"
 #include "block/block_int.h"
 #include "sysemu/block-backend.h"
 #include "qemu/module.h"
@@ -36,6 +35,7 @@
 #include "qapi-event.h"
 #include "trace.h"
 #include "qemu/option_int.h"
+#include "qemu/cutils.h"
 
 /*
   Differences with QCOW:
@@ -965,6 +965,14 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
     }
     s->crypt_method_header = header.crypt_method;
     if (s->crypt_method_header) {
+        if (bdrv_uses_whitelist() &&
+            s->crypt_method_header == QCOW_CRYPT_AES) {
+            error_report("qcow2 built-in AES encryption is deprecated");
+            error_printf("Support for it will be removed in a future release.\n"
+                         "You can use 'qemu-img convert' to switch to an\n"
+                         "unencrypted qcow2 image, or a LUKS raw image.\n");
+        }
+
         bs->encrypted = 1;
     }
 
@@ -1978,6 +1986,10 @@ static int qcow2_change_backing_file(BlockDriverState *bs,
 {
     BDRVQcow2State *s = bs->opaque;
 
+    if (backing_file && strlen(backing_file) > 1023) {
+        return -EINVAL;
+    }
+
     pstrcpy(bs->backing_file, sizeof(bs->backing_file), backing_file ?: "");
     pstrcpy(bs->backing_format, sizeof(bs->backing_format), backing_fmt ?: "");
 
@@ -2160,8 +2172,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
     }
 
     blk = blk_new_open(filename, NULL, NULL,
-                       BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
-                       &local_err);
+                       BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
     if (blk == NULL) {
         error_propagate(errp, local_err);
         return -EIO;
@@ -2225,8 +2236,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
     options = qdict_new();
     qdict_put(options, "driver", qstring_from_str("qcow2"));
     blk = blk_new_open(filename, NULL, options,
-                       BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH,
-                       &local_err);
+                       BDRV_O_RDWR | BDRV_O_NO_FLUSH, &local_err);
     if (blk == NULL) {
         error_propagate(errp, local_err);
         ret = -EIO;
@@ -2287,8 +2297,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
     options = qdict_new();
     qdict_put(options, "driver", qstring_from_str("qcow2"));
     blk = blk_new_open(filename, NULL, options,
-                       BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_BACKING,
-                       &local_err);
+                       BDRV_O_RDWR | BDRV_O_NO_BACKING, &local_err);
     if (blk == NULL) {
         error_propagate(errp, local_err);
         ret = -EIO;