@@ -532,6 +532,13 @@ Use @var{file} as CD-ROM image (you cannot use @option{-hdc} and
using @file{/dev/cdrom} as filename (@pxref{host_drives}).
ETEXI
+DEF("blockdev", HAS_ARG, QEMU_OPTION_blockdev,
+ "-blockdev [driver=]driver[,node-name=N][,discard=ignore|unmap]\n"
+ " [,cache.direct=on|off][,cache.no-flush=on|off]\n"
+ " [,read-only=on|off][,detect-zeroes=on|off|unmap]\n"
+ " [,driver specific parameters...]\n"
+ " configure a block backend\n", QEMU_ARCH_ALL)
+
DEF("drive", HAS_ARG, QEMU_OPTION_drive,
"-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]\n"
" [,cyls=c,heads=h,secs=s[,trans=t]][,snapshot=on|off]\n"
@@ -95,6 +95,9 @@ int main(int argc, char **argv)
#include "migration/colo.h"
#include "sysemu/kvm.h"
#include "sysemu/hax.h"
+#include "qapi/qobject-input-visitor.h"
+#include "qapi/qobject-input-visitor.h"
+#include "qapi-visit.h"
#include "qapi/qmp/qjson.h"
#include "qemu/option.h"
#include "qemu/config-file.h"
@@ -2975,6 +2978,13 @@ int main(int argc, char **argv, char **envp)
Error *main_loop_err = NULL;
Error *err = NULL;
bool list_data_dirs = false;
+ typedef struct BlockdevOptions_queue {
+ BlockdevOptions *bdo;
+ Location loc;
+ QSIMPLEQ_ENTRY(BlockdevOptions_queue) entry;
+ } BlockdevOptions_queue;
+ QSIMPLEQ_HEAD(, BlockdevOptions_queue) bdo_queue
+ = QSIMPLEQ_HEAD_INITIALIZER(bdo_queue);
module_call_init(MODULE_INIT_TRACE);
@@ -3117,6 +3127,25 @@ int main(int argc, char **argv, char **envp)
drive_add(IF_DEFAULT, popt->index - QEMU_OPTION_hda, optarg,
HD_OPTS);
break;
+ case QEMU_OPTION_blockdev:
+ {
+ Visitor *v;
+ BlockdevOptions_queue *bdo;
+
+ v = qobject_input_visitor_new_str(optarg, "driver", &err);
+ if (!v) {
+ error_report_err(err);
+ exit(1);
+ }
+
+ bdo = g_new(BlockdevOptions_queue, 1);
+ visit_type_BlockdevOptions(v, NULL, &bdo->bdo,
+ &error_fatal);
+ visit_free(v);
+ loc_save(&bdo->loc);
+ QSIMPLEQ_INSERT_TAIL(&bdo_queue, bdo, entry);
+ break;
+ }
case QEMU_OPTION_drive:
if (drive_def(optarg) == NULL) {
exit(1);
@@ -4450,6 +4479,16 @@ int main(int argc, char **argv, char **envp)
}
/* open the virtual block devices */
+ while (!QSIMPLEQ_EMPTY(&bdo_queue)) {
+ BlockdevOptions_queue *bdo = QSIMPLEQ_FIRST(&bdo_queue);
+
+ QSIMPLEQ_REMOVE_HEAD(&bdo_queue, entry);
+ loc_push_restore(&bdo->loc);
+ qmp_blockdev_add(bdo->bdo, &error_fatal);
+ loc_pop(&bdo->loc);
+ qapi_free_BlockdevOptions(bdo->bdo);
+ g_free(bdo);
+ }
if (snapshot || replay_mode != REPLAY_MODE_NONE) {
qemu_opts_foreach(qemu_find_opts("drive"), drive_enable_snapshot,
NULL, NULL);
The new command line option -blockdev works like QMP command blockdev-add. The option argument may be given in JSON syntax, exactly as in QMP. Example usage: -blockdev '{"node-name": "foo", "driver": "raw", "file": {"driver": "file", "filename": "foo.img"} }' The JSON argument doesn't exactly blend into the existing option syntax, so the traditional KEY=VALUE,... syntax is also supported, using dotted keys to do the nesting: -blockdev node-name=foo,driver=raw,file.driver=file,file.filename=foo.img This does not yet support lists or downstream extensions, i.e. keys with __RFQDN_ prefix, but the next few patches will take care of that. Note that calling qmp_blockdev_add() (say via qmp_marshal_block_add()) right away would crash. We need to stash the configuration for later instead. This is crudely done, and bypasses QemuOpts, even though storing configuration is what QemuOpts is for. Need to revamp option infrastructure to support QAPI types like BlockdevOptions. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1488317230-26248-22-git-send-email-armbru@redhat.com> --- qemu-options.hx | 7 +++++++ vl.c | 39 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+)