block: remove support for using "file" driver with block/char devices

The 'host_device' and 'host_cdrom' drivers must be used instead.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

block/file-posix.c

@@ -719,15 +719,9 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
     }
 
     if (!device) {
-        if (S_ISBLK(st.st_mode)) {
-            warn_report("Opening a block device as a file using the '%s' "
-                        "driver is deprecated", bs->drv->format_name);
-        } else if (S_ISCHR(st.st_mode)) {
-            warn_report("Opening a character device as a file using the '%s' "
-                        "driver is deprecated", bs->drv->format_name);
-        } else if (!S_ISREG(st.st_mode)) {
-            error_setg(errp, "A regular file was expected by the '%s' driver, "
-                       "but something else was given", bs->drv->format_name);
+        if (!S_ISREG(st.st_mode)) {
+            error_setg(errp, "'%s' driver requires '%s' to be a regular file",
+                       bs->drv->format_name, bs->filename);
             ret = -EINVAL;
             goto fail;
         } else {
@@ -736,8 +730,9 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
         }
     } else {
         if (!(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
-            error_setg(errp, "'%s' driver expects either "
-                       "a character or block device", bs->drv->format_name);
+            error_setg(errp, "'%s' driver requires '%s' to be either "
+                       "a character or block device",
+                       bs->drv->format_name, bs->filename);
             ret = -EINVAL;
             goto fail;
         }

docs/system/deprecated.rst

@@ -21,13 +21,6 @@ deprecated.
 System emulator command line arguments
 --------------------------------------
 
-``-drive file=json:{...{'driver':'file'}}`` (since 3.0)
-'''''''''''''''''''''''''''''''''''''''''''''''''''''''
-
-The 'file' driver for drives is no longer appropriate for character or host
-devices and will only accept regular files (S_IFREG). The correct driver
-for these file types is 'host_cdrom' or 'host_device' as appropriate.
-
 ``QEMU_AUDIO_`` environment variables and ``-audio-help`` (since 4.0)
 '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
 

docs/system/removed-features.rst

@@ -57,6 +57,13 @@ by the ``tls-authz`` and ``sasl-authz`` options.
 The ``pretty=on|off`` switch has no effect for HMP monitors and
 its use is rejected.
 
+``-drive file=json:{...{'driver':'file'}}`` (removed 6.0)
+'''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+The 'file' driver for drives is no longer appropriate for character or host
+devices and will only accept regular files (S_IFREG). The correct driver
+for these file types is 'host_cdrom' or 'host_device' as appropriate.
+
 QEMU Machine Protocol (QMP) commands
 ------------------------------------
 

tests/qemu-iotests/226.out

@@ -3,23 +3,23 @@ QA output created by 226
 === Testing with driver:file ===
 
 == Testing RO ==
-qemu-io: can't open: A regular file was expected by the 'file' driver, but something else was given
-qemu-io: warning: Opening a character device as a file using the 'file' driver is deprecated
+qemu-io: can't open: 'file' driver requires 'TEST_DIR/t.IMGFMT' to be a regular file
+qemu-io: can't open: 'file' driver requires '/dev/null' to be a regular file
 == Testing RW ==
 qemu-io: can't open: Could not open 'TEST_DIR/t.IMGFMT': Is a directory
-qemu-io: warning: Opening a character device as a file using the 'file' driver is deprecated
+qemu-io: can't open: 'file' driver requires '/dev/null' to be a regular file
 
 === Testing with driver:host_device ===
 
 == Testing RO ==
-qemu-io: can't open: 'host_device' driver expects either a character or block device
+qemu-io: can't open: 'host_device' driver requires 'TEST_DIR/t.IMGFMT' to be either a character or block device
 == Testing RW ==
 qemu-io: can't open: Could not open 'TEST_DIR/t.IMGFMT': Is a directory
 
 === Testing with driver:host_cdrom ===
 
 == Testing RO ==
-qemu-io: can't open: 'host_cdrom' driver expects either a character or block device
+qemu-io: can't open: 'host_cdrom' driver requires 'TEST_DIR/t.IMGFMT' to be either a character or block device
 == Testing RW ==
 qemu-io: can't open: Could not open 'TEST_DIR/t.IMGFMT': Is a directory