*
* This work is licensed under the terms of the GNU GPL, version 2 or
* later. See the COPYING file in the top-level directory.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
*/
#include "sysemu/blockdev.h"
-#include "hw/block-common.h"
+#include "hw/block/block.h"
#include "block/blockjob.h"
#include "monitor/monitor.h"
#include "qapi/qmp/qerror.h"
#include "sysemu/arch_init.h"
static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
+extern QemuOptsList qemu_common_drive_opts;
static const char *const if_name[IF_COUNT] = {
[IF_NONE] = "none",
bdrv_delete(dinfo->bdrv);
g_free(dinfo->id);
QTAILQ_REMOVE(&drives, dinfo, next);
+ g_free(dinfo->serial);
g_free(dinfo);
}
}
}
-static bool do_check_io_limits(BlockIOLimit *io_limits)
+static bool do_check_io_limits(BlockIOLimit *io_limits, Error **errp)
{
bool bps_flag;
bool iops_flag;
&& ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0)
|| (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0));
if (bps_flag || iops_flag) {
+ error_setg(errp, "bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
+ "cannot be used at the same time");
+ return false;
+ }
+
+ if (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] < 0 ||
+ io_limits->bps[BLOCK_IO_LIMIT_WRITE] < 0 ||
+ io_limits->bps[BLOCK_IO_LIMIT_READ] < 0 ||
+ io_limits->iops[BLOCK_IO_LIMIT_TOTAL] < 0 ||
+ io_limits->iops[BLOCK_IO_LIMIT_WRITE] < 0 ||
+ io_limits->iops[BLOCK_IO_LIMIT_READ] < 0) {
+ error_setg(errp, "bps and iops values must be 0 or greater");
return false;
}
return true;
}
-DriveInfo *drive_init(QemuOpts *opts, BlockInterfaceType block_default_type)
+DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
{
const char *buf;
const char *file = NULL;
int snapshot = 0;
bool copy_on_read;
int ret;
+ Error *error = NULL;
+ QemuOpts *opts;
+ QDict *bs_opts;
+ const char *id;
translation = BIOS_ATA_TRANSLATION_AUTO;
media = MEDIA_DISK;
+ /* Check common options by copying from all_opts to opts, all other options
+ * are stored in bs_opts. */
+ id = qemu_opts_id(all_opts);
+ opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
+ if (error_is_set(&error)) {
+ qerror_report_err(error);
+ error_free(error);
+ return NULL;
+ }
+
+ bs_opts = qdict_new();
+ qemu_opts_to_qdict(all_opts, bs_opts);
+ qemu_opts_absorb_qdict(opts, bs_opts, &error);
+ if (error_is_set(&error)) {
+ qerror_report_err(error);
+ error_free(error);
+ return NULL;
+ }
+
+ if (id) {
+ qdict_del(bs_opts, "id");
+ }
+
/* extract parameters */
bus_id = qemu_opt_get_number(opts, "bus", 0);
unit_id = qemu_opt_get_number(opts, "unit", -1);
}
}
+ if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
+ if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
+ error_report("invalid discard option");
+ return NULL;
+ }
+ }
+
bdrv_flags |= BDRV_O_CACHE_WB;
if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) {
error_printf("\n");
return NULL;
}
- drv = bdrv_find_whitelisted_format(buf);
+ drv = bdrv_find_whitelisted_format(buf, ro);
if (!drv) {
error_report("'%s' invalid format", buf);
return NULL;
io_limits.iops[BLOCK_IO_LIMIT_WRITE] =
qemu_opt_get_number(opts, "iops_wr", 0);
- if (!do_check_io_limits(&io_limits)) {
- error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
- "cannot be used at the same time");
+ if (!do_check_io_limits(&io_limits, &error)) {
+ error_report("%s", error_get_pretty(error));
+ error_free(error);
return NULL;
}
dinfo->heads = heads;
dinfo->secs = secs;
dinfo->trans = translation;
- dinfo->opts = opts;
+ dinfo->opts = all_opts;
dinfo->refcount = 1;
- dinfo->serial = serial;
+ if (serial != NULL) {
+ dinfo->serial = g_strdup(serial);
+ }
QTAILQ_INSERT_TAIL(&drives, dinfo, next);
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
case IF_MTD:
break;
case IF_VIRTIO:
+ {
/* add virtio block device */
- opts = qemu_opts_create_nofail(qemu_find_opts("device"));
+ QemuOpts *devopts;
+ devopts = qemu_opts_create_nofail(qemu_find_opts("device"));
if (arch_type == QEMU_ARCH_S390X) {
- qemu_opt_set(opts, "driver", "virtio-blk-s390");
+ qemu_opt_set(devopts, "driver", "virtio-blk-s390");
} else {
- qemu_opt_set(opts, "driver", "virtio-blk-pci");
+ qemu_opt_set(devopts, "driver", "virtio-blk-pci");
}
- qemu_opt_set(opts, "drive", dinfo->id);
+ qemu_opt_set(devopts, "drive", dinfo->id);
if (devaddr)
- qemu_opt_set(opts, "addr", devaddr);
+ qemu_opt_set(devopts, "addr", devaddr);
break;
+ }
default:
abort();
}
if (!file || !*file) {
- return dinfo;
+ if (qdict_size(bs_opts)) {
+ file = NULL;
+ } else {
+ return dinfo;
+ }
}
if (snapshot) {
/* always use cache=unsafe with snapshot */
error_report("warning: disabling copy_on_read on readonly drive");
}
- ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
+ ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv);
+ bs_opts = NULL;
+
if (ret < 0) {
- error_report("could not open disk image %s: %s",
- file, strerror(-ret));
+ if (ret == -EMEDIUMTYPE) {
+ error_report("could not open disk image %s: not in %s format",
+ file ?: dinfo->id, drv->format_name);
+ } else {
+ error_report("could not open disk image %s: %s",
+ file ?: dinfo->id, strerror(-ret));
+ }
goto err;
}
if (bdrv_key_required(dinfo->bdrv))
autostart = 0;
+
+ qemu_opts_del(opts);
+
return dinfo;
err:
+ qemu_opts_del(opts);
+ QDECREF(bs_opts);
bdrv_delete(dinfo->bdrv);
g_free(dinfo->id);
QTAILQ_REMOVE(&drives, dinfo, next);
if (!strcmp(device, "all")) {
ret = bdrv_commit_all();
- if (ret == -EBUSY) {
- qerror_report(QERR_DEVICE_IN_USE, device);
- return;
- }
} else {
bs = bdrv_find(device);
if (!bs) {
- qerror_report(QERR_DEVICE_NOT_FOUND, device);
+ monitor_printf(mon, "Device '%s' not found\n", device);
return;
}
ret = bdrv_commit(bs);
- if (ret == -EBUSY) {
- qerror_report(QERR_DEVICE_IN_USE, device);
- return;
- }
+ }
+ if (ret < 0) {
+ monitor_printf(mon, "'commit' error for '%s': %s\n", device,
+ strerror(-ret));
}
}
static void blockdev_do_action(int kind, void *data, Error **errp)
{
- BlockdevAction action;
- BlockdevActionList list;
+ TransactionAction action;
+ TransactionActionList list;
action.kind = kind;
action.data = data;
.has_mode = has_mode,
.mode = mode,
};
- blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, &snapshot,
- errp);
+ blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
+ &snapshot, errp);
}
/* New and old BlockDriverState structs for group snapshots */
-typedef struct BlkTransactionStates {
+
+typedef struct BlkTransactionState BlkTransactionState;
+
+/* Only prepare() may fail. In a single transaction, only one of commit() or
+ abort() will be called, clean() will always be called if it present. */
+typedef struct BdrvActionOps {
+ /* Size of state struct, in bytes. */
+ size_t instance_size;
+ /* Prepare the work, must NOT be NULL. */
+ void (*prepare)(BlkTransactionState *common, Error **errp);
+ /* Commit the changes, can be NULL. */
+ void (*commit)(BlkTransactionState *common);
+ /* Abort the changes on fail, can be NULL. */
+ void (*abort)(BlkTransactionState *common);
+ /* Clean up resource in the end, can be NULL. */
+ void (*clean)(BlkTransactionState *common);
+} BdrvActionOps;
+
+/*
+ * This structure must be arranged as first member in child type, assuming
+ * that compiler will also arrange it to the same address with parent instance.
+ * Later it will be used in free().
+ */
+struct BlkTransactionState {
+ TransactionAction *action;
+ const BdrvActionOps *ops;
+ QSIMPLEQ_ENTRY(BlkTransactionState) entry;
+};
+
+/* external snapshot private data */
+typedef struct ExternalSnapshotState {
+ BlkTransactionState common;
BlockDriverState *old_bs;
BlockDriverState *new_bs;
- QSIMPLEQ_ENTRY(BlkTransactionStates) entry;
-} BlkTransactionStates;
+} ExternalSnapshotState;
+
+static void external_snapshot_prepare(BlkTransactionState *common,
+ Error **errp)
+{
+ BlockDriver *drv;
+ int flags, ret;
+ Error *local_err = NULL;
+ const char *device;
+ const char *new_image_file;
+ const char *format = "qcow2";
+ enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
+ ExternalSnapshotState *state =
+ DO_UPCAST(ExternalSnapshotState, common, common);
+ TransactionAction *action = common->action;
+
+ /* get parameters */
+ g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC);
+
+ device = action->blockdev_snapshot_sync->device;
+ new_image_file = action->blockdev_snapshot_sync->snapshot_file;
+ if (action->blockdev_snapshot_sync->has_format) {
+ format = action->blockdev_snapshot_sync->format;
+ }
+ if (action->blockdev_snapshot_sync->has_mode) {
+ mode = action->blockdev_snapshot_sync->mode;
+ }
+
+ /* start processing */
+ drv = bdrv_find_format(format);
+ if (!drv) {
+ error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
+ return;
+ }
+
+ state->old_bs = bdrv_find(device);
+ if (!state->old_bs) {
+ error_set(errp, QERR_DEVICE_NOT_FOUND, device);
+ return;
+ }
+
+ if (!bdrv_is_inserted(state->old_bs)) {
+ error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
+ return;
+ }
+
+ if (bdrv_in_use(state->old_bs)) {
+ error_set(errp, QERR_DEVICE_IN_USE, device);
+ return;
+ }
+
+ if (!bdrv_is_read_only(state->old_bs)) {
+ if (bdrv_flush(state->old_bs)) {
+ error_set(errp, QERR_IO_ERROR);
+ return;
+ }
+ }
+
+ flags = state->old_bs->open_flags;
+
+ /* create new image w/backing file */
+ if (mode != NEW_IMAGE_MODE_EXISTING) {
+ bdrv_img_create(new_image_file, format,
+ state->old_bs->filename,
+ state->old_bs->drv->format_name,
+ NULL, -1, flags, &local_err, false);
+ if (error_is_set(&local_err)) {
+ error_propagate(errp, local_err);
+ return;
+ }
+ }
+
+ /* We will manually add the backing_hd field to the bs later */
+ state->new_bs = bdrv_new("");
+ /* TODO Inherit bs->options or only take explicit options with an
+ * extended QMP command? */
+ ret = bdrv_open(state->new_bs, new_image_file, NULL,
+ flags | BDRV_O_NO_BACKING, drv);
+ if (ret != 0) {
+ error_setg_file_open(errp, -ret, new_image_file);
+ }
+}
+
+static void external_snapshot_commit(BlkTransactionState *common)
+{
+ ExternalSnapshotState *state =
+ DO_UPCAST(ExternalSnapshotState, common, common);
+
+ /* This removes our old bs and adds the new bs */
+ bdrv_append(state->new_bs, state->old_bs);
+ /* We don't need (or want) to use the transactional
+ * bdrv_reopen_multiple() across all the entries at once, because we
+ * don't want to abort all of them if one of them fails the reopen */
+ bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR,
+ NULL);
+}
+
+static void external_snapshot_abort(BlkTransactionState *common)
+{
+ ExternalSnapshotState *state =
+ DO_UPCAST(ExternalSnapshotState, common, common);
+ if (state->new_bs) {
+ bdrv_delete(state->new_bs);
+ }
+}
+
+typedef struct DriveBackupState {
+ BlkTransactionState common;
+ BlockDriverState *bs;
+ BlockJob *job;
+} DriveBackupState;
+
+static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
+{
+ DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
+ DriveBackup *backup;
+ Error *local_err = NULL;
+
+ assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
+ backup = common->action->drive_backup;
+
+ qmp_drive_backup(backup->device, backup->target,
+ backup->has_format, backup->format,
+ backup->sync,
+ backup->has_mode, backup->mode,
+ backup->has_speed, backup->speed,
+ backup->has_on_source_error, backup->on_source_error,
+ backup->has_on_target_error, backup->on_target_error,
+ &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(errp, local_err);
+ state->bs = NULL;
+ state->job = NULL;
+ return;
+ }
+
+ state->bs = bdrv_find(backup->device);
+ state->job = state->bs->job;
+}
+
+static void drive_backup_abort(BlkTransactionState *common)
+{
+ DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
+ BlockDriverState *bs = state->bs;
+
+ /* Only cancel if it's the job we started */
+ if (bs && bs->job && bs->job == state->job) {
+ block_job_cancel_sync(bs->job);
+ }
+}
+
+static void abort_prepare(BlkTransactionState *common, Error **errp)
+{
+ error_setg(errp, "Transaction aborted using Abort action");
+}
+
+static void abort_commit(BlkTransactionState *common)
+{
+ assert(false); /* this action never succeeds */
+}
+
+static const BdrvActionOps actions[] = {
+ [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
+ .instance_size = sizeof(ExternalSnapshotState),
+ .prepare = external_snapshot_prepare,
+ .commit = external_snapshot_commit,
+ .abort = external_snapshot_abort,
+ },
+ [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
+ .instance_size = sizeof(DriveBackupState),
+ .prepare = drive_backup_prepare,
+ .abort = drive_backup_abort,
+ },
+ [TRANSACTION_ACTION_KIND_ABORT] = {
+ .instance_size = sizeof(BlkTransactionState),
+ .prepare = abort_prepare,
+ .commit = abort_commit,
+ },
+};
/*
* 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
* then we do not pivot any of the devices in the group, and abandon the
* snapshots
*/
-void qmp_transaction(BlockdevActionList *dev_list, Error **errp)
+void qmp_transaction(TransactionActionList *dev_list, Error **errp)
{
- int ret = 0;
- BlockdevActionList *dev_entry = dev_list;
- BlkTransactionStates *states, *next;
+ TransactionActionList *dev_entry = dev_list;
+ BlkTransactionState *state, *next;
Error *local_err = NULL;
- QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionStates) snap_bdrv_states;
+ QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states;
QSIMPLEQ_INIT(&snap_bdrv_states);
/* drain all i/o before any snapshots */
/* We don't do anything in this loop that commits us to the snapshot */
while (NULL != dev_entry) {
- BlockdevAction *dev_info = NULL;
- BlockDriver *proto_drv;
- BlockDriver *drv;
- int flags;
- enum NewImageMode mode;
- const char *new_image_file;
- const char *device;
- const char *format = "qcow2";
+ TransactionAction *dev_info = NULL;
+ const BdrvActionOps *ops;
dev_info = dev_entry->value;
dev_entry = dev_entry->next;
- states = g_malloc0(sizeof(BlkTransactionStates));
- QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry);
-
- switch (dev_info->kind) {
- case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
- device = dev_info->blockdev_snapshot_sync->device;
- if (!dev_info->blockdev_snapshot_sync->has_mode) {
- dev_info->blockdev_snapshot_sync->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
- }
- new_image_file = dev_info->blockdev_snapshot_sync->snapshot_file;
- if (dev_info->blockdev_snapshot_sync->has_format) {
- format = dev_info->blockdev_snapshot_sync->format;
- }
- mode = dev_info->blockdev_snapshot_sync->mode;
- break;
- default:
- abort();
- }
-
- drv = bdrv_find_format(format);
- if (!drv) {
- error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
- goto delete_and_fail;
- }
-
- states->old_bs = bdrv_find(device);
- if (!states->old_bs) {
- error_set(errp, QERR_DEVICE_NOT_FOUND, device);
- goto delete_and_fail;
- }
-
- if (!bdrv_is_inserted(states->old_bs)) {
- error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
- goto delete_and_fail;
- }
-
- if (bdrv_in_use(states->old_bs)) {
- error_set(errp, QERR_DEVICE_IN_USE, device);
- goto delete_and_fail;
- }
-
- if (!bdrv_is_read_only(states->old_bs)) {
- if (bdrv_flush(states->old_bs)) {
- error_set(errp, QERR_IO_ERROR);
- goto delete_and_fail;
- }
- }
-
- flags = states->old_bs->open_flags;
+ assert(dev_info->kind < ARRAY_SIZE(actions));
- proto_drv = bdrv_find_protocol(new_image_file);
- if (!proto_drv) {
- error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
- goto delete_and_fail;
- }
-
- /* create new image w/backing file */
- if (mode != NEW_IMAGE_MODE_EXISTING) {
- bdrv_img_create(new_image_file, format,
- states->old_bs->filename,
- states->old_bs->drv->format_name,
- NULL, -1, flags, &local_err);
- if (error_is_set(&local_err)) {
- error_propagate(errp, local_err);
- goto delete_and_fail;
- }
- }
+ ops = &actions[dev_info->kind];
+ state = g_malloc0(ops->instance_size);
+ state->ops = ops;
+ state->action = dev_info;
+ QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
- /* We will manually add the backing_hd field to the bs later */
- states->new_bs = bdrv_new("");
- ret = bdrv_open(states->new_bs, new_image_file,
- flags | BDRV_O_NO_BACKING, drv);
- if (ret != 0) {
- error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file);
+ state->ops->prepare(state, &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(errp, local_err);
goto delete_and_fail;
}
}
-
- /* Now we are going to do the actual pivot. Everything up to this point
- * is reversible, but we are committed at this point */
- QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) {
- /* This removes our old bs from the bdrv_states, and adds the new bs */
- bdrv_append(states->new_bs, states->old_bs);
- /* We don't need (or want) to use the transactional
- * bdrv_reopen_multiple() across all the entries at once, because we
- * don't want to abort all of them if one of them fails the reopen */
- bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR,
- NULL);
+ QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
+ if (state->ops->commit) {
+ state->ops->commit(state);
+ }
}
/* success */
* failure, and it is all-or-none; abandon each new bs, and keep using
* the original bs for all images
*/
- QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) {
- if (states->new_bs) {
- bdrv_delete(states->new_bs);
+ QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
+ if (state->ops->abort) {
+ state->ops->abort(state);
}
}
exit:
- QSIMPLEQ_FOREACH_SAFE(states, &snap_bdrv_states, entry, next) {
- g_free(states);
+ QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
+ if (state->ops->clean) {
+ state->ops->clean(state);
+ }
+ g_free(state);
}
}
int bdrv_flags, BlockDriver *drv,
const char *password, Error **errp)
{
- if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
- error_set(errp, QERR_OPEN_FILE_FAILED, filename);
+ int ret;
+
+ ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv);
+ if (ret < 0) {
+ error_setg_file_open(errp, -ret, filename);
return;
}
}
if (format) {
- drv = bdrv_find_whitelisted_format(format);
+ drv = bdrv_find_whitelisted_format(format, bs->read_only);
if (!drv) {
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
return;
io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd;
io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr;
- if (!do_check_io_limits(&io_limits)) {
- error_set(errp, QERR_INVALID_PARAMETER_COMBINATION);
+ if (!do_check_io_limits(&io_limits, errp)) {
return;
}
bs->io_limits = io_limits;
- bs->slice_time = BLOCK_IO_SLICE_TIME;
if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
bdrv_io_limits_enable(bs);
*/
if (bdrv_get_attached_dev(bs)) {
bdrv_make_anon(bs);
+
+ /* Further I/O must not pause the guest */
+ bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
+ BLOCKDEV_ON_ERROR_REPORT);
} else {
drive_uninit(drive_get_by_blockdev(bs));
}
void qmp_block_resize(const char *device, int64_t size, Error **errp)
{
BlockDriverState *bs;
+ int ret;
bs = bdrv_find(device);
if (!bs) {
return;
}
- switch (bdrv_truncate(bs, size)) {
+ /* complete all in-flight operations before resizing the device */
+ bdrv_drain_all();
+
+ ret = bdrv_truncate(bs, size);
+ switch (ret) {
case 0:
break;
case -ENOMEDIUM:
error_set(errp, QERR_DEVICE_IN_USE, device);
break;
default:
- error_set(errp, QERR_UNDEFINED_ERROR);
+ error_setg_errno(errp, -ret, "Could not resize");
break;
}
}
drive_get_ref(drive_get_by_blockdev(bs));
}
+void qmp_drive_backup(const char *device, const char *target,
+ bool has_format, const char *format,
+ enum MirrorSyncMode sync,
+ bool has_mode, enum NewImageMode mode,
+ bool has_speed, int64_t speed,
+ bool has_on_source_error, BlockdevOnError on_source_error,
+ bool has_on_target_error, BlockdevOnError on_target_error,
+ Error **errp)
+{
+ BlockDriverState *bs;
+ BlockDriverState *target_bs;
+ BlockDriver *drv = NULL;
+ Error *local_err = NULL;
+ int flags;
+ int64_t size;
+ int ret;
+
+ if (sync != MIRROR_SYNC_MODE_FULL) {
+ error_setg(errp, "only sync mode 'full' is currently supported");
+ return;
+ }
+ if (!has_speed) {
+ speed = 0;
+ }
+ if (!has_on_source_error) {
+ on_source_error = BLOCKDEV_ON_ERROR_REPORT;
+ }
+ if (!has_on_target_error) {
+ on_target_error = BLOCKDEV_ON_ERROR_REPORT;
+ }
+ if (!has_mode) {
+ mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
+ }
+
+ bs = bdrv_find(device);
+ if (!bs) {
+ error_set(errp, QERR_DEVICE_NOT_FOUND, device);
+ return;
+ }
+
+ if (!bdrv_is_inserted(bs)) {
+ error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
+ return;
+ }
+
+ if (!has_format) {
+ format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
+ }
+ if (format) {
+ drv = bdrv_find_format(format);
+ if (!drv) {
+ error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
+ return;
+ }
+ }
+
+ if (bdrv_in_use(bs)) {
+ error_set(errp, QERR_DEVICE_IN_USE, device);
+ return;
+ }
+
+ flags = bs->open_flags | BDRV_O_RDWR;
+
+ size = bdrv_getlength(bs);
+ if (size < 0) {
+ error_setg_errno(errp, -size, "bdrv_getlength failed");
+ return;
+ }
+
+ if (mode != NEW_IMAGE_MODE_EXISTING) {
+ assert(format && drv);
+ bdrv_img_create(target, format,
+ NULL, NULL, NULL, size, flags, &local_err, false);
+ }
+
+ if (error_is_set(&local_err)) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ target_bs = bdrv_new("");
+ ret = bdrv_open(target_bs, target, NULL, flags, drv);
+ if (ret < 0) {
+ bdrv_delete(target_bs);
+ error_setg_file_open(errp, -ret, target);
+ return;
+ }
+
+ backup_start(bs, target_bs, speed, on_source_error, on_target_error,
+ block_job_cb, bs, &local_err);
+ if (local_err != NULL) {
+ bdrv_delete(target_bs);
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ /* Grab a reference so hotplug does not delete the BlockDriverState from
+ * underneath us.
+ */
+ drive_get_ref(drive_get_by_blockdev(bs));
+}
+
+#define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
+
void qmp_drive_mirror(const char *device, const char *target,
bool has_format, const char *format,
enum MirrorSyncMode sync,
bool has_mode, enum NewImageMode mode,
bool has_speed, int64_t speed,
+ bool has_granularity, uint32_t granularity,
+ bool has_buf_size, int64_t buf_size,
bool has_on_source_error, BlockdevOnError on_source_error,
bool has_on_target_error, BlockdevOnError on_target_error,
Error **errp)
{
- BlockDriverInfo bdi;
BlockDriverState *bs;
BlockDriverState *source, *target_bs;
- BlockDriver *proto_drv;
BlockDriver *drv = NULL;
Error *local_err = NULL;
int flags;
- uint64_t size;
+ int64_t size;
int ret;
if (!has_speed) {
if (!has_mode) {
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
}
+ if (!has_granularity) {
+ granularity = 0;
+ }
+ if (!has_buf_size) {
+ buf_size = DEFAULT_MIRROR_BUF_SIZE;
+ }
+
+ if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
+ error_set(errp, QERR_INVALID_PARAMETER, device);
+ return;
+ }
+ if (granularity & (granularity - 1)) {
+ error_set(errp, QERR_INVALID_PARAMETER, device);
+ return;
+ }
bs = bdrv_find(device);
if (!bs) {
sync = MIRROR_SYNC_MODE_FULL;
}
- proto_drv = bdrv_find_protocol(target);
- if (!proto_drv) {
- error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
+ size = bdrv_getlength(bs);
+ if (size < 0) {
+ error_setg_errno(errp, -size, "bdrv_getlength failed");
return;
}
if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
/* create new image w/o backing file */
assert(format && drv);
- bdrv_get_geometry(bs, &size);
- size *= 512;
bdrv_img_create(target, format,
- NULL, NULL, NULL, size, flags, &local_err);
+ NULL, NULL, NULL, size, flags, &local_err, false);
} else {
switch (mode) {
case NEW_IMAGE_MODE_EXISTING:
bdrv_img_create(target, format,
source->filename,
source->drv->format_name,
- NULL, -1, flags, &local_err);
+ NULL, size, flags, &local_err, false);
break;
default:
abort();
return;
}
+ /* Mirroring takes care of copy-on-write using the source's backing
+ * file.
+ */
target_bs = bdrv_new("");
- ret = bdrv_open(target_bs, target, flags | BDRV_O_NO_BACKING, drv);
-
+ ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv);
if (ret < 0) {
bdrv_delete(target_bs);
- error_set(errp, QERR_OPEN_FILE_FAILED, target);
+ error_setg_file_open(errp, -ret, target);
return;
}
- /* We need a backing file if we will copy parts of a cluster. */
- if (bdrv_get_info(target_bs, &bdi) >= 0 && bdi.cluster_size != 0 &&
- bdi.cluster_size >= BDRV_SECTORS_PER_DIRTY_CHUNK * 512) {
- ret = bdrv_open_backing_file(target_bs);
- if (ret < 0) {
- bdrv_delete(target_bs);
- error_set(errp, QERR_OPEN_FILE_FAILED, target);
- return;
- }
- }
-
- mirror_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
+ mirror_start(bs, target_bs, speed, granularity, buf_size, sync,
+ on_source_error, on_target_error,
block_job_cb, bs, &local_err);
if (local_err != NULL) {
bdrv_delete(target_bs);
return dummy.next;
}
-QemuOptsList qemu_drive_opts = {
+QemuOptsList qemu_common_drive_opts = {
.name = "drive",
- .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
.desc = {
{
.name = "bus",
.name = "file",
.type = QEMU_OPT_STRING,
.help = "disk image",
+ },{
+ .name = "discard",
+ .type = QEMU_OPT_STRING,
+ .help = "discard operation (ignore/off, unmap/on)",
},{
.name = "cache",
.type = QEMU_OPT_STRING,
{ /* end of list */ }
},
};
+
+QemuOptsList qemu_drive_opts = {
+ .name = "drive",
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
+ .desc = {
+ /*
+ * no elements => accept any params
+ * validation will happen later
+ */
+ { /* end of list */ }
+ },
+};
projects / qemu.git / blobdiff