Block layer patches

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

Block layer patches

# gpg: Signature made Fri 02 Oct 2015 12:49:13 BST using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"

* remotes/kevin/tags/for-upstream:
  block/raw-posix: Open file descriptor O_RDWR to work around glibc posix_fallocate emulation issue.
  block: disable I/O limits at the beginning of bdrv_close()
  iotests: Fix test 128 for password-less sudo
  tests: Fix test 049 fallout from improved HMP error messages
  raw-win32: Fix write request error handling

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

block.c

@@ -1907,6 +1907,12 @@ void bdrv_close(BlockDriverState *bs)
     if (bs->job) {
         block_job_cancel_sync(bs->job);
     }
+
+    /* Disable I/O limits and drain all pending throttled requests */
+    if (bs->io_limits_enabled) {
+        bdrv_io_limits_disable(bs);
+    }
+
     bdrv_drain(bs); /* complete I/O */
     bdrv_flush(bs);
     bdrv_drain(bs); /* in case flush left pending I/O */
@@ -1958,11 +1964,6 @@ void bdrv_close(BlockDriverState *bs)
         blk_dev_change_media_cb(bs->blk, false);
     }
 
-    /*throttling disk I/O limits*/
-    if (bs->io_limits_enabled) {
-        bdrv_io_limits_disable(bs);
-    }
-
     QLIST_FOREACH_SAFE(ban, &bs->aio_notifiers, list, ban_next) {
         g_free(ban);
     }

block/raw-posix.c

@@ -1648,7 +1648,7 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
         goto out;
     }
 
-    fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
+    fd = qemu_open(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
                    0644);
     if (fd < 0) {
         result = -errno;

block/raw-win32.c

@@ -119,9 +119,9 @@ static int aio_worker(void *arg)
     case QEMU_AIO_WRITE:
         count = handle_aiocb_rw(aiocb);
         if (count == aiocb->aio_nbytes) {
-            count = 0;
+            ret = 0;
         } else {
-            count = -EINVAL;
+            ret = -EINVAL;
         }
         break;
     case QEMU_AIO_FLUSH:

tests/qemu-iotests/049.out

@@ -118,6 +118,7 @@ qemu-img: kilobytes, megabytes, gigabytes, terabytes, petabytes and exabytes.
 
 qemu-img create -f qcow2 -o size=foobar TEST_DIR/t.qcow2
 qemu-img: Parameter 'size' expects a size
+You may use k, M, G or T suffixes for kilobytes, megabytes, gigabytes and terabytes.
 qemu-img: TEST_DIR/t.qcow2: Invalid options for file format 'qcow2'
 
 == Check correct interpretation of suffixes for cluster size ==

tests/qemu-iotests/128

@@ -31,6 +31,11 @@ status=1	# failure is the default!
 devname="eiodev$$"
 sudo=""
 
+_sudo_qemu_io_wrapper()
+{
+    (exec $sudo "$QEMU_IO_PROG" $QEMU_IO_OPTIONS "$@")
+}
+
 _setup_eiodev()
 {
 	# This test should either be run as root or with passwordless sudo
@@ -76,7 +81,9 @@ TEST_IMG="/dev/mapper/$devname"
 echo
 echo "== reading from error device =="
 # Opening image should succeed but the read operation should fail
-$sudo $QEMU_IO --format "$IMGFMT" --nocache -c "read 0 65536" "$TEST_IMG" | _filter_qemu_io
+_sudo_qemu_io_wrapper --format "$IMGFMT" --nocache \
+                      -c "read 0 65536" "$TEST_IMG" \
+    | _filter_qemu_io
 
 # success, all done
 echo "*** done"