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blkdebug: Implement bdrv_refresh_filename()

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Because blkdebug cannot simply create a configuration file, simply
refuse to reconstruct a plain filename and only generate an options
QDict from the rules instead.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2014-07-18 20:24:57 +02:00 committed by Kevin Wolf
parent 91af701412
commit 2c31b04c94
1 changed files with 97 additions and 0 deletions
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97
block/blkdebug.c
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@ -26,6 +26,10 @@
#include "qemu/config-file.h"
#include "block/block_int.h"
#include "qemu/module.h"
#include "qapi/qmp/qbool.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qint.h"
#include "qapi/qmp/qstring.h"
typedef struct BDRVBlkdebugState {
int state;
@ -706,6 +710,98 @@ static int64_t blkdebug_getlength(BlockDriverState *bs)
return bdrv_getlength(bs->file);
}
static void blkdebug_refresh_filename(BlockDriverState *bs)
{
BDRVBlkdebugState *s = bs->opaque;
struct BlkdebugRule *rule;
QDict *opts;
QList *inject_error_list = NULL, *set_state_list = NULL;
QList *suspend_list = NULL;
int event;
if (!bs->file->full_open_options) {
/* The config file cannot be recreated, so creating a plain filename
* is impossible */
return;
}
opts = qdict_new();
qdict_put_obj(opts, "driver", QOBJECT(qstring_from_str("blkdebug")));
QINCREF(bs->file->full_open_options);
qdict_put_obj(opts, "image", QOBJECT(bs->file->full_open_options));
for (event = 0; event < BLKDBG_EVENT_MAX; event++) {
QLIST_FOREACH(rule, &s->rules[event], next) {
if (rule->action == ACTION_INJECT_ERROR) {
QDict *inject_error = qdict_new();
qdict_put_obj(inject_error, "event", QOBJECT(qstring_from_str(
BlkdebugEvent_lookup[rule->event])));
qdict_put_obj(inject_error, "state",
QOBJECT(qint_from_int(rule->state)));
qdict_put_obj(inject_error, "errno", QOBJECT(qint_from_int(
rule->options.inject.error)));
qdict_put_obj(inject_error, "sector", QOBJECT(qint_from_int(
rule->options.inject.sector)));
qdict_put_obj(inject_error, "once", QOBJECT(qbool_from_int(
rule->options.inject.once)));
qdict_put_obj(inject_error, "immediately",
QOBJECT(qbool_from_int(
rule->options.inject.immediately)));
if (!inject_error_list) {
inject_error_list = qlist_new();
}
qlist_append_obj(inject_error_list, QOBJECT(inject_error));
} else if (rule->action == ACTION_SET_STATE) {
QDict *set_state = qdict_new();
qdict_put_obj(set_state, "event", QOBJECT(qstring_from_str(
BlkdebugEvent_lookup[rule->event])));
qdict_put_obj(set_state, "state",
QOBJECT(qint_from_int(rule->state)));
qdict_put_obj(set_state, "new_state", QOBJECT(qint_from_int(
rule->options.set_state.new_state)));
if (!set_state_list) {
set_state_list = qlist_new();
}
qlist_append_obj(set_state_list, QOBJECT(set_state));
} else if (rule->action == ACTION_SUSPEND) {
QDict *suspend = qdict_new();
qdict_put_obj(suspend, "event", QOBJECT(qstring_from_str(
BlkdebugEvent_lookup[rule->event])));
qdict_put_obj(suspend, "state",
QOBJECT(qint_from_int(rule->state)));
qdict_put_obj(suspend, "tag", QOBJECT(qstring_from_str(
rule->options.suspend.tag)));
if (!suspend_list) {
suspend_list = qlist_new();
}
qlist_append_obj(suspend_list, QOBJECT(suspend));
}
}
}
if (inject_error_list) {
qdict_put_obj(opts, "inject-error", QOBJECT(inject_error_list));
}
if (set_state_list) {
qdict_put_obj(opts, "set-state", QOBJECT(set_state_list));
}
if (suspend_list) {
qdict_put_obj(opts, "suspend", QOBJECT(suspend_list));
}
bs->full_open_options = opts;
}
static BlockDriver bdrv_blkdebug = {
.format_name = "blkdebug",
.protocol_name = "blkdebug",
@ -715,6 +811,7 @@ static BlockDriver bdrv_blkdebug = {
.bdrv_file_open = blkdebug_open,
.bdrv_close = blkdebug_close,
.bdrv_getlength = blkdebug_getlength,
.bdrv_refresh_filename = blkdebug_refresh_filename,
.bdrv_aio_readv = blkdebug_aio_readv,
.bdrv_aio_writev = blkdebug_aio_writev,