Block patches for 2.3.0-rc1

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

Block patches for 2.3.0-rc1

# gpg: Signature made Thu Mar 19 15:03:26 2015 GMT using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"

* remotes/kevin/tags/for-upstream:
  block: Fix blockdev-backup not to use funky error class
  raw-posix: Deprecate aio=threads fallback without O_DIRECT
  raw-posix: Deprecate host floppy passthrough

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

block/raw-posix.c

@@ -503,6 +503,14 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
         error_setg_errno(errp, -ret, "Could not set AIO state");
         goto fail;
     }
+    if (!s->use_aio && (bdrv_flags & BDRV_O_NATIVE_AIO)) {
+        error_printf("WARNING: aio=native was specified for '%s', but "
+                     "it requires cache.direct=on, which was not "
+                     "specified. Falling back to aio=threads.\n"
+                     "         This will become an error condition in "
+                     "future QEMU versions.\n",
+                     bs->filename);
+    }
 #endif
 
     s->has_discard = true;
@@ -2387,6 +2395,8 @@ static int floppy_open(BlockDriverState *bs, QDict *options, int flags,
     s->fd = -1;
     s->fd_media_changed = 1;
 
+    error_report("Host floppy pass-through is deprecated");
+    error_printf("Support for it will be removed in a future release.\n");
     return 0;
 }
 

blockdev.c

@@ -1574,14 +1574,14 @@ static void blockdev_backup_prepare(BlkTransactionState *common, Error **errp)
 
     blk = blk_by_name(backup->device);
     if (!blk) {
-        error_set(errp, QERR_DEVICE_NOT_FOUND, backup->device);
+        error_setg(errp, "Device '%s' not found", backup->device);
         return;
     }
     bs = blk_bs(blk);
 
     blk = blk_by_name(backup->target);
     if (!blk) {
-        error_set(errp, QERR_DEVICE_NOT_FOUND, backup->target);
+        error_setg(errp, "Device '%s' not found", backup->target);
         return;
     }
     target = blk_bs(blk);
@@ -2421,7 +2421,7 @@ void qmp_blockdev_backup(const char *device, const char *target,
 
     blk = blk_by_name(device);
     if (!blk) {
-        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
+        error_setg(errp, "Device '%s' not found", device);
         return;
     }
     bs = blk_bs(blk);
@@ -2431,7 +2431,7 @@ void qmp_blockdev_backup(const char *device, const char *target,
 
     blk = blk_by_name(target);
     if (!blk) {
-        error_set(errp, QERR_DEVICE_NOT_FOUND, target);
+        error_setg(errp, "Device '%s' not found", target);
         goto out;
     }
     target_bs = blk_bs(blk);

qapi/block-core.json

@@ -218,6 +218,7 @@
 #       'host_floppy', 'http', 'https', 'nbd', 'parallels', 'qcow',
 #       'qcow2', 'raw', 'tftp', 'vdi', 'vmdk', 'vpc', 'vvfat'
 #       2.2: 'archipelago' added, 'cow' dropped
+#       2.3: 'host_floppy' deprecated
 #
 # @backing_file: #optional the name of the backing file (for copy-on-write)
 #
@@ -881,9 +882,6 @@
 #
 # For the arguments, see the documentation of BlockdevBackup.
 #
-# Returns: Nothing on success.
-#          If @device or @target is not a valid block device, DeviceNotFound.
-#
 # Since 2.3
 ##
 { 'command': 'blockdev-backup', 'data': 'BlockdevBackup' }
@@ -1245,6 +1243,7 @@
 # Drivers that are supported in block device operations.
 #
 # @host_device, @host_cdrom, @host_floppy: Since 2.1
+# @host_floppy: deprecated since 2.3
 #
 # Since: 2.0
 ##

qemu-doc.texi

@@ -736,8 +736,7 @@ devices. We describe here the usage for QEMU version >= 0.8.3.
 
 On Linux, you can directly use the host device filename instead of a
 disk image filename provided you have enough privileges to access
-it. For example, use @file{/dev/cdrom} to access to the CDROM or
+it. For example, use @file{/dev/cdrom} to access to the CDROM.
-@file{/dev/fd0} for the floppy.
 
 @table @code
 @item CD
@@ -749,6 +748,8 @@ You can specify a floppy device even if no floppy is loaded. Floppy
 removal is currently not detected accurately (if you change floppy
 without doing floppy access while the floppy is not loaded, the guest
 OS will think that the same floppy is loaded).
+Use of the host's floppy device is deprecated, and support for it will
+be removed in a future release.
 @item Hard disks
 Hard disks can be used. Normally you must specify the whole disk
 (@file{/dev/hdb} instead of @file{/dev/hdb1}) so that the guest OS can

qemu-options.hx

@@ -419,8 +419,7 @@ STEXI
 @item -fdb @var{file}
 @findex -fda
 @findex -fdb
-Use @var{file} as floppy disk 0/1 image (@pxref{disk_images}). You can
+Use @var{file} as floppy disk 0/1 image (@pxref{disk_images}).
-use the host floppy by using @file{/dev/fd0} as filename (@pxref{host_drives}).
 ETEXI
 
 DEF("hda", HAS_ARG, QEMU_OPTION_hda,

qmp-commands.hx

@@ -2150,7 +2150,7 @@ Each json-object contain the following:
          - "drv": driver format name (json-string)
              - Possible values: "blkdebug", "bochs", "cloop", "dmg",
                                 "file", "file", "ftp", "ftps", "host_cdrom",
-                                "host_device", "host_floppy", "http", "https",
+                                "host_device", "http", "https",
                                 "nbd", "parallels", "qcow", "qcow2", "raw",
                                 "tftp", "vdi", "vmdk", "vpc", "vvfat"
          - "backing_file": backing file name (json-string, optional)

tests/qemu-iotests/055

@@ -126,7 +126,10 @@ class TestSingleDrive(iotests.QMPTestCase):
 
     def do_test_device_not_found(self, cmd, **args):
         result = self.vm.qmp(cmd, **args)
-        self.assert_qmp(result, 'error/class', 'DeviceNotFound')
+        if cmd == 'drive-backup':
+            self.assert_qmp(result, 'error/class', 'DeviceNotFound')
+        else:
+            self.assert_qmp(result, 'error/class', 'GenericError')
 
     def test_device_not_found(self):
         self.do_test_device_not_found('drive-backup', device='nonexistent',
@@ -364,7 +367,7 @@ class TestSingleTransaction(iotests.QMPTestCase):
                           'sync': 'full' },
             }
         ])
-        self.assert_qmp(result, 'error/class', 'DeviceNotFound')
+        self.assert_qmp(result, 'error/class', 'GenericError')
 
         result = self.vm.qmp('transaction', actions=[{
                 'type': 'blockdev-backup',
@@ -373,7 +376,7 @@ class TestSingleTransaction(iotests.QMPTestCase):
                           'sync': 'full' },
             }
         ])
-        self.assert_qmp(result, 'error/class', 'DeviceNotFound')
+        self.assert_qmp(result, 'error/class', 'GenericError')
 
         result = self.vm.qmp('transaction', actions=[{
                 'type': 'blockdev-backup',
@@ -382,7 +385,7 @@ class TestSingleTransaction(iotests.QMPTestCase):
                           'sync': 'full' },
             }
         ])
-        self.assert_qmp(result, 'error/class', 'DeviceNotFound')
+        self.assert_qmp(result, 'error/class', 'GenericError')
 
     def test_target_is_source(self):
         result = self.vm.qmp('transaction', actions=[{