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-rw-r--r--qemu/blockdev.c4296
1 files changed, 0 insertions, 4296 deletions
diff --git a/qemu/blockdev.c b/qemu/blockdev.c
deleted file mode 100644
index f1f520a26..000000000
--- a/qemu/blockdev.c
+++ /dev/null
@@ -1,4296 +0,0 @@
-/*
- * QEMU host block devices
- *
- * Copyright (c) 2003-2008 Fabrice Bellard
- *
- * 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 "qemu/osdep.h"
-#include "sysemu/block-backend.h"
-#include "sysemu/blockdev.h"
-#include "hw/block/block.h"
-#include "block/blockjob.h"
-#include "block/throttle-groups.h"
-#include "monitor/monitor.h"
-#include "qemu/error-report.h"
-#include "qemu/option.h"
-#include "qemu/config-file.h"
-#include "qapi/qmp/types.h"
-#include "qapi-visit.h"
-#include "qapi/qmp/qerror.h"
-#include "qapi/qmp-output-visitor.h"
-#include "qapi/util.h"
-#include "sysemu/sysemu.h"
-#include "block/block_int.h"
-#include "qmp-commands.h"
-#include "trace.h"
-#include "sysemu/arch_init.h"
-#include "qemu/cutils.h"
-#include "qemu/help_option.h"
-
-static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
- QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
-
-static const char *const if_name[IF_COUNT] = {
- [IF_NONE] = "none",
- [IF_IDE] = "ide",
- [IF_SCSI] = "scsi",
- [IF_FLOPPY] = "floppy",
- [IF_PFLASH] = "pflash",
- [IF_MTD] = "mtd",
- [IF_SD] = "sd",
- [IF_VIRTIO] = "virtio",
- [IF_XEN] = "xen",
-};
-
-static int if_max_devs[IF_COUNT] = {
- /*
- * Do not change these numbers! They govern how drive option
- * index maps to unit and bus. That mapping is ABI.
- *
- * All controllers used to imlement if=T drives need to support
- * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
- * Otherwise, some index values map to "impossible" bus, unit
- * values.
- *
- * For instance, if you change [IF_SCSI] to 255, -drive
- * if=scsi,index=12 no longer means bus=1,unit=5, but
- * bus=0,unit=12. With an lsi53c895a controller (7 units max),
- * the drive can't be set up. Regression.
- */
- [IF_IDE] = 2,
- [IF_SCSI] = 7,
-};
-
-/**
- * Boards may call this to offer board-by-board overrides
- * of the default, global values.
- */
-void override_max_devs(BlockInterfaceType type, int max_devs)
-{
- BlockBackend *blk;
- DriveInfo *dinfo;
-
- if (max_devs <= 0) {
- return;
- }
-
- for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
- dinfo = blk_legacy_dinfo(blk);
- if (dinfo->type == type) {
- fprintf(stderr, "Cannot override units-per-bus property of"
- " the %s interface, because a drive of that type has"
- " already been added.\n", if_name[type]);
- g_assert_not_reached();
- }
- }
-
- if_max_devs[type] = max_devs;
-}
-
-/*
- * We automatically delete the drive when a device using it gets
- * unplugged. Questionable feature, but we can't just drop it.
- * Device models call blockdev_mark_auto_del() to schedule the
- * automatic deletion, and generic qdev code calls blockdev_auto_del()
- * when deletion is actually safe.
- */
-void blockdev_mark_auto_del(BlockBackend *blk)
-{
- DriveInfo *dinfo = blk_legacy_dinfo(blk);
- BlockDriverState *bs = blk_bs(blk);
- AioContext *aio_context;
-
- if (!dinfo) {
- return;
- }
-
- if (bs) {
- aio_context = bdrv_get_aio_context(bs);
- aio_context_acquire(aio_context);
-
- if (bs->job) {
- block_job_cancel(bs->job);
- }
-
- aio_context_release(aio_context);
- }
-
- dinfo->auto_del = 1;
-}
-
-void blockdev_auto_del(BlockBackend *blk)
-{
- DriveInfo *dinfo = blk_legacy_dinfo(blk);
-
- if (dinfo && dinfo->auto_del) {
- monitor_remove_blk(blk);
- blk_unref(blk);
- }
-}
-
-/**
- * Returns the current mapping of how many units per bus
- * a particular interface can support.
- *
- * A positive integer indicates n units per bus.
- * 0 implies the mapping has not been established.
- * -1 indicates an invalid BlockInterfaceType was given.
- */
-int drive_get_max_devs(BlockInterfaceType type)
-{
- if (type >= IF_IDE && type < IF_COUNT) {
- return if_max_devs[type];
- }
-
- return -1;
-}
-
-static int drive_index_to_bus_id(BlockInterfaceType type, int index)
-{
- int max_devs = if_max_devs[type];
- return max_devs ? index / max_devs : 0;
-}
-
-static int drive_index_to_unit_id(BlockInterfaceType type, int index)
-{
- int max_devs = if_max_devs[type];
- return max_devs ? index % max_devs : index;
-}
-
-QemuOpts *drive_def(const char *optstr)
-{
- return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
-}
-
-QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
- const char *optstr)
-{
- QemuOpts *opts;
-
- opts = drive_def(optstr);
- if (!opts) {
- return NULL;
- }
- if (type != IF_DEFAULT) {
- qemu_opt_set(opts, "if", if_name[type], &error_abort);
- }
- if (index >= 0) {
- qemu_opt_set_number(opts, "index", index, &error_abort);
- }
- if (file)
- qemu_opt_set(opts, "file", file, &error_abort);
- return opts;
-}
-
-DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
-{
- BlockBackend *blk;
- DriveInfo *dinfo;
-
- for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
- dinfo = blk_legacy_dinfo(blk);
- if (dinfo && dinfo->type == type
- && dinfo->bus == bus && dinfo->unit == unit) {
- return dinfo;
- }
- }
-
- return NULL;
-}
-
-bool drive_check_orphaned(void)
-{
- BlockBackend *blk;
- DriveInfo *dinfo;
- bool rs = false;
-
- for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
- dinfo = blk_legacy_dinfo(blk);
- /* If dinfo->bdrv->dev is NULL, it has no device attached. */
- /* Unless this is a default drive, this may be an oversight. */
- if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
- dinfo->type != IF_NONE) {
- fprintf(stderr, "Warning: Orphaned drive without device: "
- "id=%s,file=%s,if=%s,bus=%d,unit=%d\n",
- blk_name(blk), blk_bs(blk) ? blk_bs(blk)->filename : "",
- if_name[dinfo->type], dinfo->bus, dinfo->unit);
- rs = true;
- }
- }
-
- return rs;
-}
-
-DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
-{
- return drive_get(type,
- drive_index_to_bus_id(type, index),
- drive_index_to_unit_id(type, index));
-}
-
-int drive_get_max_bus(BlockInterfaceType type)
-{
- int max_bus;
- BlockBackend *blk;
- DriveInfo *dinfo;
-
- max_bus = -1;
- for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
- dinfo = blk_legacy_dinfo(blk);
- if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
- max_bus = dinfo->bus;
- }
- }
- return max_bus;
-}
-
-/* Get a block device. This should only be used for single-drive devices
- (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
- appropriate bus. */
-DriveInfo *drive_get_next(BlockInterfaceType type)
-{
- static int next_block_unit[IF_COUNT];
-
- return drive_get(type, 0, next_block_unit[type]++);
-}
-
-static void bdrv_format_print(void *opaque, const char *name)
-{
- error_printf(" %s", name);
-}
-
-typedef struct {
- QEMUBH *bh;
- BlockDriverState *bs;
-} BDRVPutRefBH;
-
-static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
-{
- if (!strcmp(buf, "ignore")) {
- return BLOCKDEV_ON_ERROR_IGNORE;
- } else if (!is_read && !strcmp(buf, "enospc")) {
- return BLOCKDEV_ON_ERROR_ENOSPC;
- } else if (!strcmp(buf, "stop")) {
- return BLOCKDEV_ON_ERROR_STOP;
- } else if (!strcmp(buf, "report")) {
- return BLOCKDEV_ON_ERROR_REPORT;
- } else {
- error_setg(errp, "'%s' invalid %s error action",
- buf, is_read ? "read" : "write");
- return -1;
- }
-}
-
-static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals,
- Error **errp)
-{
- const QListEntry *entry;
- for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) {
- switch (qobject_type(entry->value)) {
-
- case QTYPE_QSTRING: {
- unsigned long long length;
- const char *str = qstring_get_str(qobject_to_qstring(entry->value));
- if (parse_uint_full(str, &length, 10) == 0 &&
- length > 0 && length <= UINT_MAX) {
- block_acct_add_interval(stats, (unsigned) length);
- } else {
- error_setg(errp, "Invalid interval length: %s", str);
- return false;
- }
- break;
- }
-
- case QTYPE_QINT: {
- int64_t length = qint_get_int(qobject_to_qint(entry->value));
- if (length > 0 && length <= UINT_MAX) {
- block_acct_add_interval(stats, (unsigned) length);
- } else {
- error_setg(errp, "Invalid interval length: %" PRId64, length);
- return false;
- }
- break;
- }
-
- default:
- error_setg(errp, "The specification of stats-intervals is invalid");
- return false;
- }
- }
- return true;
-}
-
-typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
-
-/* All parameters but @opts are optional and may be set to NULL. */
-static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
- const char **throttling_group, ThrottleConfig *throttle_cfg,
- BlockdevDetectZeroesOptions *detect_zeroes, Error **errp)
-{
- const char *discard;
- Error *local_error = NULL;
- const char *aio;
-
- if (bdrv_flags) {
- if (!qemu_opt_get_bool(opts, "read-only", false)) {
- *bdrv_flags |= BDRV_O_RDWR;
- }
- if (qemu_opt_get_bool(opts, "copy-on-read", false)) {
- *bdrv_flags |= BDRV_O_COPY_ON_READ;
- }
-
- if ((discard = qemu_opt_get(opts, "discard")) != NULL) {
- if (bdrv_parse_discard_flags(discard, bdrv_flags) != 0) {
- error_setg(errp, "Invalid discard option");
- return;
- }
- }
-
- if ((aio = qemu_opt_get(opts, "aio")) != NULL) {
- if (!strcmp(aio, "native")) {
- *bdrv_flags |= BDRV_O_NATIVE_AIO;
- } else if (!strcmp(aio, "threads")) {
- /* this is the default */
- } else {
- error_setg(errp, "invalid aio option");
- return;
- }
- }
- }
-
- /* disk I/O throttling */
- if (throttling_group) {
- *throttling_group = qemu_opt_get(opts, "throttling.group");
- }
-
- if (throttle_cfg) {
- throttle_config_init(throttle_cfg);
- throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg =
- qemu_opt_get_number(opts, "throttling.bps-total", 0);
- throttle_cfg->buckets[THROTTLE_BPS_READ].avg =
- qemu_opt_get_number(opts, "throttling.bps-read", 0);
- throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg =
- qemu_opt_get_number(opts, "throttling.bps-write", 0);
- throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg =
- qemu_opt_get_number(opts, "throttling.iops-total", 0);
- throttle_cfg->buckets[THROTTLE_OPS_READ].avg =
- qemu_opt_get_number(opts, "throttling.iops-read", 0);
- throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg =
- qemu_opt_get_number(opts, "throttling.iops-write", 0);
-
- throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max =
- qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
- throttle_cfg->buckets[THROTTLE_BPS_READ].max =
- qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
- throttle_cfg->buckets[THROTTLE_BPS_WRITE].max =
- qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
- throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max =
- qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
- throttle_cfg->buckets[THROTTLE_OPS_READ].max =
- qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
- throttle_cfg->buckets[THROTTLE_OPS_WRITE].max =
- qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
-
- throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length =
- qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
- throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length =
- qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
- throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length =
- qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
- throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length =
- qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
- throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length =
- qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
- throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length =
- qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
-
- throttle_cfg->op_size =
- qemu_opt_get_number(opts, "throttling.iops-size", 0);
-
- if (!throttle_is_valid(throttle_cfg, errp)) {
- return;
- }
- }
-
- if (detect_zeroes) {
- *detect_zeroes =
- qapi_enum_parse(BlockdevDetectZeroesOptions_lookup,
- qemu_opt_get(opts, "detect-zeroes"),
- BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX,
- BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
- &local_error);
- if (local_error) {
- error_propagate(errp, local_error);
- return;
- }
-
- if (bdrv_flags &&
- *detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP &&
- !(*bdrv_flags & BDRV_O_UNMAP))
- {
- error_setg(errp, "setting detect-zeroes to unmap is not allowed "
- "without setting discard operation to unmap");
- return;
- }
- }
-}
-
-/* Takes the ownership of bs_opts */
-static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
- Error **errp)
-{
- const char *buf;
- int bdrv_flags = 0;
- int on_read_error, on_write_error;
- bool account_invalid, account_failed;
- bool writethrough;
- BlockBackend *blk;
- BlockDriverState *bs;
- ThrottleConfig cfg;
- int snapshot = 0;
- Error *error = NULL;
- QemuOpts *opts;
- QDict *interval_dict = NULL;
- QList *interval_list = NULL;
- const char *id;
- BlockdevDetectZeroesOptions detect_zeroes =
- BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
- const char *throttling_group = NULL;
-
- /* Check common options by copying from bs_opts to opts, all other options
- * stay in bs_opts for processing by bdrv_open(). */
- id = qdict_get_try_str(bs_opts, "id");
- opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
- if (error) {
- error_propagate(errp, error);
- goto err_no_opts;
- }
-
- qemu_opts_absorb_qdict(opts, bs_opts, &error);
- if (error) {
- error_propagate(errp, error);
- goto early_err;
- }
-
- if (id) {
- qdict_del(bs_opts, "id");
- }
-
- /* extract parameters */
- snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
-
- account_invalid = qemu_opt_get_bool(opts, "stats-account-invalid", true);
- account_failed = qemu_opt_get_bool(opts, "stats-account-failed", true);
-
- writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true);
-
- qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals.");
- qdict_array_split(interval_dict, &interval_list);
-
- if (qdict_size(interval_dict) != 0) {
- error_setg(errp, "Invalid option stats-intervals.%s",
- qdict_first(interval_dict)->key);
- goto early_err;
- }
-
- extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg,
- &detect_zeroes, &error);
- if (error) {
- error_propagate(errp, error);
- goto early_err;
- }
-
- if ((buf = qemu_opt_get(opts, "format")) != NULL) {
- if (is_help_option(buf)) {
- error_printf("Supported formats:");
- bdrv_iterate_format(bdrv_format_print, NULL);
- error_printf("\n");
- goto early_err;
- }
-
- if (qdict_haskey(bs_opts, "driver")) {
- error_setg(errp, "Cannot specify both 'driver' and 'format'");
- goto early_err;
- }
- qdict_put(bs_opts, "driver", qstring_from_str(buf));
- }
-
- on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
- if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
- on_write_error = parse_block_error_action(buf, 0, &error);
- if (error) {
- error_propagate(errp, error);
- goto early_err;
- }
- }
-
- on_read_error = BLOCKDEV_ON_ERROR_REPORT;
- if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
- on_read_error = parse_block_error_action(buf, 1, &error);
- if (error) {
- error_propagate(errp, error);
- goto early_err;
- }
- }
-
- if (snapshot) {
- bdrv_flags |= BDRV_O_SNAPSHOT;
- }
-
- /* init */
- if ((!file || !*file) && !qdict_size(bs_opts)) {
- BlockBackendRootState *blk_rs;
-
- blk = blk_new(errp);
- if (!blk) {
- goto early_err;
- }
-
- blk_rs = blk_get_root_state(blk);
- blk_rs->open_flags = bdrv_flags;
- blk_rs->read_only = !(bdrv_flags & BDRV_O_RDWR);
- blk_rs->detect_zeroes = detect_zeroes;
-
- if (throttle_enabled(&cfg)) {
- if (!throttling_group) {
- throttling_group = blk_name(blk);
- }
- blk_rs->throttle_group = g_strdup(throttling_group);
- blk_rs->throttle_state = throttle_group_incref(throttling_group);
- blk_rs->throttle_state->cfg = cfg;
- }
-
- QDECREF(bs_opts);
- } else {
- if (file && !*file) {
- file = NULL;
- }
-
- /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
- * with other callers) rather than what we want as the real defaults.
- * Apply the defaults here instead. */
- qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
- qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
- assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0);
-
- if (runstate_check(RUN_STATE_INMIGRATE)) {
- bdrv_flags |= BDRV_O_INACTIVE;
- }
-
- blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp);
- if (!blk) {
- goto err_no_bs_opts;
- }
- bs = blk_bs(blk);
-
- bs->detect_zeroes = detect_zeroes;
-
- /* disk I/O throttling */
- if (throttle_enabled(&cfg)) {
- if (!throttling_group) {
- throttling_group = blk_name(blk);
- }
- bdrv_io_limits_enable(bs, throttling_group);
- bdrv_set_io_limits(bs, &cfg);
- }
-
- if (bdrv_key_required(bs)) {
- autostart = 0;
- }
-
- block_acct_init(blk_get_stats(blk), account_invalid, account_failed);
-
- if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) {
- blk_unref(blk);
- blk = NULL;
- goto err_no_bs_opts;
- }
- }
-
- blk_set_enable_write_cache(blk, !writethrough);
- blk_set_on_error(blk, on_read_error, on_write_error);
-
- if (!monitor_add_blk(blk, qemu_opts_id(opts), errp)) {
- blk_unref(blk);
- blk = NULL;
- goto err_no_bs_opts;
- }
-
-err_no_bs_opts:
- qemu_opts_del(opts);
- QDECREF(interval_dict);
- QDECREF(interval_list);
- return blk;
-
-early_err:
- qemu_opts_del(opts);
- QDECREF(interval_dict);
- QDECREF(interval_list);
-err_no_opts:
- QDECREF(bs_opts);
- return NULL;
-}
-
-static QemuOptsList qemu_root_bds_opts;
-
-/* Takes the ownership of bs_opts */
-static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
-{
- BlockDriverState *bs;
- QemuOpts *opts;
- Error *local_error = NULL;
- BlockdevDetectZeroesOptions detect_zeroes;
- int ret;
- int bdrv_flags = 0;
-
- opts = qemu_opts_create(&qemu_root_bds_opts, NULL, 1, errp);
- if (!opts) {
- goto fail;
- }
-
- qemu_opts_absorb_qdict(opts, bs_opts, &local_error);
- if (local_error) {
- error_propagate(errp, local_error);
- goto fail;
- }
-
- extract_common_blockdev_options(opts, &bdrv_flags, NULL, NULL,
- &detect_zeroes, &local_error);
- if (local_error) {
- error_propagate(errp, local_error);
- goto fail;
- }
-
- /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
- * with other callers) rather than what we want as the real defaults.
- * Apply the defaults here instead. */
- qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
- qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
-
- if (runstate_check(RUN_STATE_INMIGRATE)) {
- bdrv_flags |= BDRV_O_INACTIVE;
- }
-
- bs = NULL;
- ret = bdrv_open(&bs, NULL, NULL, bs_opts, bdrv_flags, errp);
- if (ret < 0) {
- goto fail_no_bs_opts;
- }
-
- bs->detect_zeroes = detect_zeroes;
-
-fail_no_bs_opts:
- qemu_opts_del(opts);
- return bs;
-
-fail:
- qemu_opts_del(opts);
- QDECREF(bs_opts);
- return NULL;
-}
-
-void blockdev_close_all_bdrv_states(void)
-{
- BlockDriverState *bs, *next_bs;
-
- QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) {
- AioContext *ctx = bdrv_get_aio_context(bs);
-
- aio_context_acquire(ctx);
- bdrv_unref(bs);
- aio_context_release(ctx);
- }
-}
-
-/* Iterates over the list of monitor-owned BlockDriverStates */
-BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
-{
- return bs ? QTAILQ_NEXT(bs, monitor_list)
- : QTAILQ_FIRST(&monitor_bdrv_states);
-}
-
-static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
- Error **errp)
-{
- const char *value;
-
- value = qemu_opt_get(opts, from);
- if (value) {
- if (qemu_opt_find(opts, to)) {
- error_setg(errp, "'%s' and its alias '%s' can't be used at the "
- "same time", to, from);
- return;
- }
- }
-
- /* rename all items in opts */
- while ((value = qemu_opt_get(opts, from))) {
- qemu_opt_set(opts, to, value, &error_abort);
- qemu_opt_unset(opts, from);
- }
-}
-
-QemuOptsList qemu_legacy_drive_opts = {
- .name = "drive",
- .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
- .desc = {
- {
- .name = "bus",
- .type = QEMU_OPT_NUMBER,
- .help = "bus number",
- },{
- .name = "unit",
- .type = QEMU_OPT_NUMBER,
- .help = "unit number (i.e. lun for scsi)",
- },{
- .name = "index",
- .type = QEMU_OPT_NUMBER,
- .help = "index number",
- },{
- .name = "media",
- .type = QEMU_OPT_STRING,
- .help = "media type (disk, cdrom)",
- },{
- .name = "if",
- .type = QEMU_OPT_STRING,
- .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
- },{
- .name = "cyls",
- .type = QEMU_OPT_NUMBER,
- .help = "number of cylinders (ide disk geometry)",
- },{
- .name = "heads",
- .type = QEMU_OPT_NUMBER,
- .help = "number of heads (ide disk geometry)",
- },{
- .name = "secs",
- .type = QEMU_OPT_NUMBER,
- .help = "number of sectors (ide disk geometry)",
- },{
- .name = "trans",
- .type = QEMU_OPT_STRING,
- .help = "chs translation (auto, lba, none)",
- },{
- .name = "boot",
- .type = QEMU_OPT_BOOL,
- .help = "(deprecated, ignored)",
- },{
- .name = "addr",
- .type = QEMU_OPT_STRING,
- .help = "pci address (virtio only)",
- },{
- .name = "serial",
- .type = QEMU_OPT_STRING,
- .help = "disk serial number",
- },{
- .name = "file",
- .type = QEMU_OPT_STRING,
- .help = "file name",
- },
-
- /* Options that are passed on, but have special semantics with -drive */
- {
- .name = "read-only",
- .type = QEMU_OPT_BOOL,
- .help = "open drive file as read-only",
- },{
- .name = "rerror",
- .type = QEMU_OPT_STRING,
- .help = "read error action",
- },{
- .name = "werror",
- .type = QEMU_OPT_STRING,
- .help = "write error action",
- },{
- .name = "copy-on-read",
- .type = QEMU_OPT_BOOL,
- .help = "copy read data from backing file into image file",
- },
-
- { /* end of list */ }
- },
-};
-
-DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type)
-{
- const char *value;
- BlockBackend *blk;
- DriveInfo *dinfo = NULL;
- QDict *bs_opts;
- QemuOpts *legacy_opts;
- DriveMediaType media = MEDIA_DISK;
- BlockInterfaceType type;
- int cyls, heads, secs, translation;
- int max_devs, bus_id, unit_id, index;
- const char *devaddr;
- const char *werror, *rerror;
- bool read_only = false;
- bool copy_on_read;
- const char *serial;
- const char *filename;
- Error *local_err = NULL;
- int i;
-
- /* Change legacy command line options into QMP ones */
- static const struct {
- const char *from;
- const char *to;
- } opt_renames[] = {
- { "iops", "throttling.iops-total" },
- { "iops_rd", "throttling.iops-read" },
- { "iops_wr", "throttling.iops-write" },
-
- { "bps", "throttling.bps-total" },
- { "bps_rd", "throttling.bps-read" },
- { "bps_wr", "throttling.bps-write" },
-
- { "iops_max", "throttling.iops-total-max" },
- { "iops_rd_max", "throttling.iops-read-max" },
- { "iops_wr_max", "throttling.iops-write-max" },
-
- { "bps_max", "throttling.bps-total-max" },
- { "bps_rd_max", "throttling.bps-read-max" },
- { "bps_wr_max", "throttling.bps-write-max" },
-
- { "iops_size", "throttling.iops-size" },
-
- { "group", "throttling.group" },
-
- { "readonly", "read-only" },
- };
-
- for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
- qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
- &local_err);
- if (local_err) {
- error_report_err(local_err);
- return NULL;
- }
- }
-
- value = qemu_opt_get(all_opts, "cache");
- if (value) {
- int flags = 0;
- bool writethrough;
-
- if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) {
- error_report("invalid cache option");
- return NULL;
- }
-
- /* Specific options take precedence */
- if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) {
- qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB,
- !writethrough, &error_abort);
- }
- if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) {
- qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT,
- !!(flags & BDRV_O_NOCACHE), &error_abort);
- }
- if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) {
- qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH,
- !!(flags & BDRV_O_NO_FLUSH), &error_abort);
- }
- qemu_opt_unset(all_opts, "cache");
- }
-
- /* Get a QDict for processing the options */
- bs_opts = qdict_new();
- qemu_opts_to_qdict(all_opts, bs_opts);
-
- legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
- &error_abort);
- qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
- if (local_err) {
- error_report_err(local_err);
- goto fail;
- }
-
- /* Deprecated option boot=[on|off] */
- if (qemu_opt_get(legacy_opts, "boot") != NULL) {
- fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
- "ignored. Future versions will reject this parameter. Please "
- "update your scripts.\n");
- }
-
- /* Media type */
- value = qemu_opt_get(legacy_opts, "media");
- if (value) {
- if (!strcmp(value, "disk")) {
- media = MEDIA_DISK;
- } else if (!strcmp(value, "cdrom")) {
- media = MEDIA_CDROM;
- read_only = true;
- } else {
- error_report("'%s' invalid media", value);
- goto fail;
- }
- }
-
- /* copy-on-read is disabled with a warning for read-only devices */
- read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false);
- copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
-
- if (read_only && copy_on_read) {
- error_report("warning: disabling copy-on-read on read-only drive");
- copy_on_read = false;
- }
-
- qdict_put(bs_opts, "read-only",
- qstring_from_str(read_only ? "on" : "off"));
- qdict_put(bs_opts, "copy-on-read",
- qstring_from_str(copy_on_read ? "on" :"off"));
-
- /* Controller type */
- value = qemu_opt_get(legacy_opts, "if");
- if (value) {
- for (type = 0;
- type < IF_COUNT && strcmp(value, if_name[type]);
- type++) {
- }
- if (type == IF_COUNT) {
- error_report("unsupported bus type '%s'", value);
- goto fail;
- }
- } else {
- type = block_default_type;
- }
-
- /* Geometry */
- cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
- heads = qemu_opt_get_number(legacy_opts, "heads", 0);
- secs = qemu_opt_get_number(legacy_opts, "secs", 0);
-
- if (cyls || heads || secs) {
- if (cyls < 1) {
- error_report("invalid physical cyls number");
- goto fail;
- }
- if (heads < 1) {
- error_report("invalid physical heads number");
- goto fail;
- }
- if (secs < 1) {
- error_report("invalid physical secs number");
- goto fail;
- }
- }
-
- translation = BIOS_ATA_TRANSLATION_AUTO;
- value = qemu_opt_get(legacy_opts, "trans");
- if (value != NULL) {
- if (!cyls) {
- error_report("'%s' trans must be used with cyls, heads and secs",
- value);
- goto fail;
- }
- if (!strcmp(value, "none")) {
- translation = BIOS_ATA_TRANSLATION_NONE;
- } else if (!strcmp(value, "lba")) {
- translation = BIOS_ATA_TRANSLATION_LBA;
- } else if (!strcmp(value, "large")) {
- translation = BIOS_ATA_TRANSLATION_LARGE;
- } else if (!strcmp(value, "rechs")) {
- translation = BIOS_ATA_TRANSLATION_RECHS;
- } else if (!strcmp(value, "auto")) {
- translation = BIOS_ATA_TRANSLATION_AUTO;
- } else {
- error_report("'%s' invalid translation type", value);
- goto fail;
- }
- }
-
- if (media == MEDIA_CDROM) {
- if (cyls || secs || heads) {
- error_report("CHS can't be set with media=cdrom");
- goto fail;
- }
- }
-
- /* Device address specified by bus/unit or index.
- * If none was specified, try to find the first free one. */
- bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
- unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
- index = qemu_opt_get_number(legacy_opts, "index", -1);
-
- max_devs = if_max_devs[type];
-
- if (index != -1) {
- if (bus_id != 0 || unit_id != -1) {
- error_report("index cannot be used with bus and unit");
- goto fail;
- }
- bus_id = drive_index_to_bus_id(type, index);
- unit_id = drive_index_to_unit_id(type, index);
- }
-
- if (unit_id == -1) {
- unit_id = 0;
- while (drive_get(type, bus_id, unit_id) != NULL) {
- unit_id++;
- if (max_devs && unit_id >= max_devs) {
- unit_id -= max_devs;
- bus_id++;
- }
- }
- }
-
- if (max_devs && unit_id >= max_devs) {
- error_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
- goto fail;
- }
-
- if (drive_get(type, bus_id, unit_id) != NULL) {
- error_report("drive with bus=%d, unit=%d (index=%d) exists",
- bus_id, unit_id, index);
- goto fail;
- }
-
- /* Serial number */
- serial = qemu_opt_get(legacy_opts, "serial");
-
- /* no id supplied -> create one */
- if (qemu_opts_id(all_opts) == NULL) {
- char *new_id;
- const char *mediastr = "";
- if (type == IF_IDE || type == IF_SCSI) {
- mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
- }
- if (max_devs) {
- new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
- mediastr, unit_id);
- } else {
- new_id = g_strdup_printf("%s%s%i", if_name[type],
- mediastr, unit_id);
- }
- qdict_put(bs_opts, "id", qstring_from_str(new_id));
- g_free(new_id);
- }
-
- /* Add virtio block device */
- devaddr = qemu_opt_get(legacy_opts, "addr");
- if (devaddr && type != IF_VIRTIO) {
- error_report("addr is not supported by this bus type");
- goto fail;
- }
-
- if (type == IF_VIRTIO) {
- QemuOpts *devopts;
- devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
- &error_abort);
- if (arch_type == QEMU_ARCH_S390X) {
- qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort);
- } else {
- qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort);
- }
- qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
- &error_abort);
- if (devaddr) {
- qemu_opt_set(devopts, "addr", devaddr, &error_abort);
- }
- }
-
- filename = qemu_opt_get(legacy_opts, "file");
-
- /* Check werror/rerror compatibility with if=... */
- werror = qemu_opt_get(legacy_opts, "werror");
- if (werror != NULL) {
- if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
- type != IF_NONE) {
- error_report("werror is not supported by this bus type");
- goto fail;
- }
- qdict_put(bs_opts, "werror", qstring_from_str(werror));
- }
-
- rerror = qemu_opt_get(legacy_opts, "rerror");
- if (rerror != NULL) {
- if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
- type != IF_NONE) {
- error_report("rerror is not supported by this bus type");
- goto fail;
- }
- qdict_put(bs_opts, "rerror", qstring_from_str(rerror));
- }
-
- /* Actual block device init: Functionality shared with blockdev-add */
- blk = blockdev_init(filename, bs_opts, &local_err);
- bs_opts = NULL;
- if (!blk) {
- if (local_err) {
- error_report_err(local_err);
- }
- goto fail;
- } else {
- assert(!local_err);
- }
-
- /* Create legacy DriveInfo */
- dinfo = g_malloc0(sizeof(*dinfo));
- dinfo->opts = all_opts;
-
- dinfo->cyls = cyls;
- dinfo->heads = heads;
- dinfo->secs = secs;
- dinfo->trans = translation;
-
- dinfo->type = type;
- dinfo->bus = bus_id;
- dinfo->unit = unit_id;
- dinfo->devaddr = devaddr;
- dinfo->serial = g_strdup(serial);
-
- blk_set_legacy_dinfo(blk, dinfo);
-
- switch(type) {
- case IF_IDE:
- case IF_SCSI:
- case IF_XEN:
- case IF_NONE:
- dinfo->media_cd = media == MEDIA_CDROM;
- break;
- default:
- break;
- }
-
-fail:
- qemu_opts_del(legacy_opts);
- QDECREF(bs_opts);
- return dinfo;
-}
-
-void hmp_commit(Monitor *mon, const QDict *qdict)
-{
- const char *device = qdict_get_str(qdict, "device");
- BlockBackend *blk;
- int ret;
-
- if (!strcmp(device, "all")) {
- ret = blk_commit_all();
- } else {
- BlockDriverState *bs;
- AioContext *aio_context;
-
- blk = blk_by_name(device);
- if (!blk) {
- monitor_printf(mon, "Device '%s' not found\n", device);
- return;
- }
- if (!blk_is_available(blk)) {
- monitor_printf(mon, "Device '%s' has no medium\n", device);
- return;
- }
-
- bs = blk_bs(blk);
- aio_context = bdrv_get_aio_context(bs);
- aio_context_acquire(aio_context);
-
- ret = bdrv_commit(bs);
-
- aio_context_release(aio_context);
- }
- if (ret < 0) {
- monitor_printf(mon, "'commit' error for '%s': %s\n", device,
- strerror(-ret));
- }
-}
-
-static void blockdev_do_action(TransactionAction *action, Error **errp)
-{
- TransactionActionList list;
-
- list.value = action;
- list.next = NULL;
- qmp_transaction(&list, false, NULL, errp);
-}
-
-void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
- bool has_node_name, const char *node_name,
- const char *snapshot_file,
- bool has_snapshot_node_name,
- const char *snapshot_node_name,
- bool has_format, const char *format,
- bool has_mode, NewImageMode mode, Error **errp)
-{
- BlockdevSnapshotSync snapshot = {
- .has_device = has_device,
- .device = (char *) device,
- .has_node_name = has_node_name,
- .node_name = (char *) node_name,
- .snapshot_file = (char *) snapshot_file,
- .has_snapshot_node_name = has_snapshot_node_name,
- .snapshot_node_name = (char *) snapshot_node_name,
- .has_format = has_format,
- .format = (char *) format,
- .has_mode = has_mode,
- .mode = mode,
- };
- TransactionAction action = {
- .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
- .u.blockdev_snapshot_sync.data = &snapshot,
- };
- blockdev_do_action(&action, errp);
-}
-
-void qmp_blockdev_snapshot(const char *node, const char *overlay,
- Error **errp)
-{
- BlockdevSnapshot snapshot_data = {
- .node = (char *) node,
- .overlay = (char *) overlay
- };
- TransactionAction action = {
- .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT,
- .u.blockdev_snapshot.data = &snapshot_data,
- };
- blockdev_do_action(&action, errp);
-}
-
-void qmp_blockdev_snapshot_internal_sync(const char *device,
- const char *name,
- Error **errp)
-{
- BlockdevSnapshotInternal snapshot = {
- .device = (char *) device,
- .name = (char *) name
- };
- TransactionAction action = {
- .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
- .u.blockdev_snapshot_internal_sync.data = &snapshot,
- };
- blockdev_do_action(&action, errp);
-}
-
-SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
- bool has_id,
- const char *id,
- bool has_name,
- const char *name,
- Error **errp)
-{
- BlockDriverState *bs;
- BlockBackend *blk;
- AioContext *aio_context;
- QEMUSnapshotInfo sn;
- Error *local_err = NULL;
- SnapshotInfo *info = NULL;
- int ret;
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return NULL;
- }
-
- aio_context = blk_get_aio_context(blk);
- aio_context_acquire(aio_context);
-
- if (!has_id) {
- id = NULL;
- }
-
- if (!has_name) {
- name = NULL;
- }
-
- if (!id && !name) {
- error_setg(errp, "Name or id must be provided");
- goto out_aio_context;
- }
-
- if (!blk_is_available(blk)) {
- error_setg(errp, "Device '%s' has no medium", device);
- goto out_aio_context;
- }
- bs = blk_bs(blk);
-
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
- goto out_aio_context;
- }
-
- ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- goto out_aio_context;
- }
- if (!ret) {
- error_setg(errp,
- "Snapshot with id '%s' and name '%s' does not exist on "
- "device '%s'",
- STR_OR_NULL(id), STR_OR_NULL(name), device);
- goto out_aio_context;
- }
-
- bdrv_snapshot_delete(bs, id, name, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- goto out_aio_context;
- }
-
- aio_context_release(aio_context);
-
- info = g_new0(SnapshotInfo, 1);
- info->id = g_strdup(sn.id_str);
- info->name = g_strdup(sn.name);
- info->date_nsec = sn.date_nsec;
- info->date_sec = sn.date_sec;
- info->vm_state_size = sn.vm_state_size;
- info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
- info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
-
- return info;
-
-out_aio_context:
- aio_context_release(aio_context);
- return NULL;
-}
-
-/**
- * block_dirty_bitmap_lookup:
- * Return a dirty bitmap (if present), after validating
- * the node reference and bitmap names.
- *
- * @node: The name of the BDS node to search for bitmaps
- * @name: The name of the bitmap to search for
- * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
- * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL.
- * @errp: Output pointer for error information. Can be NULL.
- *
- * @return: A bitmap object on success, or NULL on failure.
- */
-static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
- const char *name,
- BlockDriverState **pbs,
- AioContext **paio,
- Error **errp)
-{
- BlockDriverState *bs;
- BdrvDirtyBitmap *bitmap;
- AioContext *aio_context;
-
- if (!node) {
- error_setg(errp, "Node cannot be NULL");
- return NULL;
- }
- if (!name) {
- error_setg(errp, "Bitmap name cannot be NULL");
- return NULL;
- }
- bs = bdrv_lookup_bs(node, node, NULL);
- if (!bs) {
- error_setg(errp, "Node '%s' not found", node);
- return NULL;
- }
-
- aio_context = bdrv_get_aio_context(bs);
- aio_context_acquire(aio_context);
-
- bitmap = bdrv_find_dirty_bitmap(bs, name);
- if (!bitmap) {
- error_setg(errp, "Dirty bitmap '%s' not found", name);
- goto fail;
- }
-
- if (pbs) {
- *pbs = bs;
- }
- if (paio) {
- *paio = aio_context;
- } else {
- aio_context_release(aio_context);
- }
-
- return bitmap;
-
- fail:
- aio_context_release(aio_context);
- return NULL;
-}
-
-/* New and old BlockDriverState structs for atomic group operations */
-
-typedef struct BlkActionState BlkActionState;
-
-/**
- * BlkActionOps:
- * Table of operations that define an Action.
- *
- * @instance_size: Size of state struct, in bytes.
- * @prepare: Prepare the work, must NOT be NULL.
- * @commit: Commit the changes, can be NULL.
- * @abort: Abort the changes on fail, can be NULL.
- * @clean: Clean up resources after all transaction actions have called
- * commit() or abort(). Can be NULL.
- *
- * Only prepare() may fail. In a single transaction, only one of commit() or
- * abort() will be called. clean() will always be called if it is present.
- */
-typedef struct BlkActionOps {
- size_t instance_size;
- void (*prepare)(BlkActionState *common, Error **errp);
- void (*commit)(BlkActionState *common);
- void (*abort)(BlkActionState *common);
- void (*clean)(BlkActionState *common);
-} BlkActionOps;
-
-/**
- * BlkActionState:
- * Describes one Action's state within a Transaction.
- *
- * @action: QAPI-defined enum identifying which Action to perform.
- * @ops: Table of ActionOps this Action can perform.
- * @block_job_txn: Transaction which this action belongs to.
- * @entry: List membership for all Actions in this Transaction.
- *
- * This structure must be arranged as first member in a subclassed type,
- * assuming that the compiler will also arrange it to the same offsets as the
- * base class.
- */
-struct BlkActionState {
- TransactionAction *action;
- const BlkActionOps *ops;
- BlockJobTxn *block_job_txn;
- TransactionProperties *txn_props;
- QSIMPLEQ_ENTRY(BlkActionState) entry;
-};
-
-/* internal snapshot private data */
-typedef struct InternalSnapshotState {
- BlkActionState common;
- BlockDriverState *bs;
- AioContext *aio_context;
- QEMUSnapshotInfo sn;
- bool created;
-} InternalSnapshotState;
-
-
-static int action_check_completion_mode(BlkActionState *s, Error **errp)
-{
- if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
- error_setg(errp,
- "Action '%s' does not support Transaction property "
- "completion-mode = %s",
- TransactionActionKind_lookup[s->action->type],
- ActionCompletionMode_lookup[s->txn_props->completion_mode]);
- return -1;
- }
- return 0;
-}
-
-static void internal_snapshot_prepare(BlkActionState *common,
- Error **errp)
-{
- Error *local_err = NULL;
- const char *device;
- const char *name;
- BlockBackend *blk;
- BlockDriverState *bs;
- QEMUSnapshotInfo old_sn, *sn;
- bool ret;
- qemu_timeval tv;
- BlockdevSnapshotInternal *internal;
- InternalSnapshotState *state;
- int ret1;
-
- g_assert(common->action->type ==
- TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
- internal = common->action->u.blockdev_snapshot_internal_sync.data;
- state = DO_UPCAST(InternalSnapshotState, common, common);
-
- /* 1. parse input */
- device = internal->device;
- name = internal->name;
-
- /* 2. check for validation */
- if (action_check_completion_mode(common, errp) < 0) {
- return;
- }
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return;
- }
-
- /* AioContext is released in .clean() */
- state->aio_context = blk_get_aio_context(blk);
- aio_context_acquire(state->aio_context);
-
- if (!blk_is_available(blk)) {
- error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
- return;
- }
- bs = blk_bs(blk);
-
- state->bs = bs;
- bdrv_drained_begin(bs);
-
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) {
- return;
- }
-
- if (bdrv_is_read_only(bs)) {
- error_setg(errp, "Device '%s' is read only", device);
- return;
- }
-
- if (!bdrv_can_snapshot(bs)) {
- error_setg(errp, "Block format '%s' used by device '%s' "
- "does not support internal snapshots",
- bs->drv->format_name, device);
- return;
- }
-
- if (!strlen(name)) {
- error_setg(errp, "Name is empty");
- return;
- }
-
- /* check whether a snapshot with name exist */
- ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn,
- &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- } else if (ret) {
- error_setg(errp,
- "Snapshot with name '%s' already exists on device '%s'",
- name, device);
- return;
- }
-
- /* 3. take the snapshot */
- sn = &state->sn;
- pstrcpy(sn->name, sizeof(sn->name), name);
- qemu_gettimeofday(&tv);
- sn->date_sec = tv.tv_sec;
- sn->date_nsec = tv.tv_usec * 1000;
- sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
-
- ret1 = bdrv_snapshot_create(bs, sn);
- if (ret1 < 0) {
- error_setg_errno(errp, -ret1,
- "Failed to create snapshot '%s' on device '%s'",
- name, device);
- return;
- }
-
- /* 4. succeed, mark a snapshot is created */
- state->created = true;
-}
-
-static void internal_snapshot_abort(BlkActionState *common)
-{
- InternalSnapshotState *state =
- DO_UPCAST(InternalSnapshotState, common, common);
- BlockDriverState *bs = state->bs;
- QEMUSnapshotInfo *sn = &state->sn;
- Error *local_error = NULL;
-
- if (!state->created) {
- return;
- }
-
- if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
- error_reportf_err(local_error,
- "Failed to delete snapshot with id '%s' and "
- "name '%s' on device '%s' in abort: ",
- sn->id_str, sn->name,
- bdrv_get_device_name(bs));
- }
-}
-
-static void internal_snapshot_clean(BlkActionState *common)
-{
- InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState,
- common, common);
-
- if (state->aio_context) {
- if (state->bs) {
- bdrv_drained_end(state->bs);
- }
- aio_context_release(state->aio_context);
- }
-}
-
-/* external snapshot private data */
-typedef struct ExternalSnapshotState {
- BlkActionState common;
- BlockDriverState *old_bs;
- BlockDriverState *new_bs;
- AioContext *aio_context;
-} ExternalSnapshotState;
-
-static void external_snapshot_prepare(BlkActionState *common,
- Error **errp)
-{
- int flags = 0, ret;
- QDict *options = NULL;
- Error *local_err = NULL;
- /* Device and node name of the image to generate the snapshot from */
- const char *device;
- const char *node_name;
- /* Reference to the new image (for 'blockdev-snapshot') */
- const char *snapshot_ref;
- /* File name of the new image (for 'blockdev-snapshot-sync') */
- const char *new_image_file;
- ExternalSnapshotState *state =
- DO_UPCAST(ExternalSnapshotState, common, common);
- TransactionAction *action = common->action;
-
- /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
- * purpose but a different set of parameters */
- switch (action->type) {
- case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT:
- {
- BlockdevSnapshot *s = action->u.blockdev_snapshot.data;
- device = s->node;
- node_name = s->node;
- new_image_file = NULL;
- snapshot_ref = s->overlay;
- }
- break;
- case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
- {
- BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
- device = s->has_device ? s->device : NULL;
- node_name = s->has_node_name ? s->node_name : NULL;
- new_image_file = s->snapshot_file;
- snapshot_ref = NULL;
- }
- break;
- default:
- g_assert_not_reached();
- }
-
- /* start processing */
- if (action_check_completion_mode(common, errp) < 0) {
- return;
- }
-
- state->old_bs = bdrv_lookup_bs(device, node_name, errp);
- if (!state->old_bs) {
- return;
- }
-
- /* Acquire AioContext now so any threads operating on old_bs stop */
- state->aio_context = bdrv_get_aio_context(state->old_bs);
- aio_context_acquire(state->aio_context);
- bdrv_drained_begin(state->old_bs);
-
- if (!bdrv_is_inserted(state->old_bs)) {
- error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
- return;
- }
-
- if (bdrv_op_is_blocked(state->old_bs,
- BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) {
- return;
- }
-
- if (!bdrv_is_read_only(state->old_bs)) {
- if (bdrv_flush(state->old_bs)) {
- error_setg(errp, QERR_IO_ERROR);
- return;
- }
- }
-
- if (!bdrv_is_first_non_filter(state->old_bs)) {
- error_setg(errp, QERR_FEATURE_DISABLED, "snapshot");
- return;
- }
-
- if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) {
- BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
- const char *format = s->has_format ? s->format : "qcow2";
- enum NewImageMode mode;
- const char *snapshot_node_name =
- s->has_snapshot_node_name ? s->snapshot_node_name : NULL;
-
- if (node_name && !snapshot_node_name) {
- error_setg(errp, "New snapshot node name missing");
- return;
- }
-
- if (snapshot_node_name &&
- bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) {
- error_setg(errp, "New snapshot node name already in use");
- return;
- }
-
- flags = state->old_bs->open_flags;
- flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING | BDRV_O_COPY_ON_READ);
-
- /* create new image w/backing file */
- mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
- if (mode != NEW_IMAGE_MODE_EXISTING) {
- int64_t size = bdrv_getlength(state->old_bs);
- if (size < 0) {
- error_setg_errno(errp, -size, "bdrv_getlength failed");
- return;
- }
- bdrv_img_create(new_image_file, format,
- state->old_bs->filename,
- state->old_bs->drv->format_name,
- NULL, size, flags, &local_err, false);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- }
- }
-
- options = qdict_new();
- if (s->has_snapshot_node_name) {
- qdict_put(options, "node-name",
- qstring_from_str(snapshot_node_name));
- }
- qdict_put(options, "driver", qstring_from_str(format));
-
- flags |= BDRV_O_NO_BACKING;
- }
-
- assert(state->new_bs == NULL);
- ret = bdrv_open(&state->new_bs, new_image_file, snapshot_ref, options,
- flags, errp);
- /* We will manually add the backing_hd field to the bs later */
- if (ret != 0) {
- return;
- }
-
- if (state->new_bs->blk != NULL) {
- error_setg(errp, "The snapshot is already in use by %s",
- blk_name(state->new_bs->blk));
- return;
- }
-
- if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT,
- errp)) {
- return;
- }
-
- if (state->new_bs->backing != NULL) {
- error_setg(errp, "The snapshot already has a backing image");
- return;
- }
-
- if (!state->new_bs->drv->supports_backing) {
- error_setg(errp, "The snapshot does not support backing images");
- }
-}
-
-static void external_snapshot_commit(BlkActionState *common)
-{
- ExternalSnapshotState *state =
- DO_UPCAST(ExternalSnapshotState, common, common);
-
- bdrv_set_aio_context(state->new_bs, state->aio_context);
-
- /* 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 */
- if (!state->old_bs->copy_on_read) {
- bdrv_reopen(state->old_bs, state->old_bs->open_flags & ~BDRV_O_RDWR,
- NULL);
- }
-}
-
-static void external_snapshot_abort(BlkActionState *common)
-{
- ExternalSnapshotState *state =
- DO_UPCAST(ExternalSnapshotState, common, common);
- if (state->new_bs) {
- bdrv_unref(state->new_bs);
- }
-}
-
-static void external_snapshot_clean(BlkActionState *common)
-{
- ExternalSnapshotState *state =
- DO_UPCAST(ExternalSnapshotState, common, common);
- if (state->aio_context) {
- bdrv_drained_end(state->old_bs);
- aio_context_release(state->aio_context);
- }
-}
-
-typedef struct DriveBackupState {
- BlkActionState common;
- BlockDriverState *bs;
- AioContext *aio_context;
- BlockJob *job;
-} DriveBackupState;
-
-static void do_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_bitmap, const char *bitmap,
- bool has_on_source_error,
- BlockdevOnError on_source_error,
- bool has_on_target_error,
- BlockdevOnError on_target_error,
- BlockJobTxn *txn, Error **errp);
-
-static void drive_backup_prepare(BlkActionState *common, Error **errp)
-{
- DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
- BlockBackend *blk;
- DriveBackup *backup;
- Error *local_err = NULL;
-
- assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
- backup = common->action->u.drive_backup.data;
-
- blk = blk_by_name(backup->device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", backup->device);
- return;
- }
-
- if (!blk_is_available(blk)) {
- error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device);
- return;
- }
-
- /* AioContext is released in .clean() */
- state->aio_context = blk_get_aio_context(blk);
- aio_context_acquire(state->aio_context);
- bdrv_drained_begin(blk_bs(blk));
- state->bs = blk_bs(blk);
-
- do_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_bitmap, backup->bitmap,
- backup->has_on_source_error, backup->on_source_error,
- backup->has_on_target_error, backup->on_target_error,
- common->block_job_txn, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- }
-
- state->job = state->bs->job;
-}
-
-static void drive_backup_abort(BlkActionState *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 drive_backup_clean(BlkActionState *common)
-{
- DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
-
- if (state->aio_context) {
- bdrv_drained_end(state->bs);
- aio_context_release(state->aio_context);
- }
-}
-
-typedef struct BlockdevBackupState {
- BlkActionState common;
- BlockDriverState *bs;
- BlockJob *job;
- AioContext *aio_context;
-} BlockdevBackupState;
-
-static void do_blockdev_backup(const char *device, const char *target,
- enum MirrorSyncMode sync,
- bool has_speed, int64_t speed,
- bool has_on_source_error,
- BlockdevOnError on_source_error,
- bool has_on_target_error,
- BlockdevOnError on_target_error,
- BlockJobTxn *txn, Error **errp);
-
-static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
-{
- BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
- BlockdevBackup *backup;
- BlockBackend *blk, *target;
- Error *local_err = NULL;
-
- assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
- backup = common->action->u.blockdev_backup.data;
-
- blk = blk_by_name(backup->device);
- if (!blk) {
- error_setg(errp, "Device '%s' not found", backup->device);
- return;
- }
-
- if (!blk_is_available(blk)) {
- error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device);
- return;
- }
-
- target = blk_by_name(backup->target);
- if (!target) {
- error_setg(errp, "Device '%s' not found", backup->target);
- return;
- }
-
- /* AioContext is released in .clean() */
- state->aio_context = blk_get_aio_context(blk);
- if (state->aio_context != blk_get_aio_context(target)) {
- state->aio_context = NULL;
- error_setg(errp, "Backup between two IO threads is not implemented");
- return;
- }
- aio_context_acquire(state->aio_context);
- state->bs = blk_bs(blk);
- bdrv_drained_begin(state->bs);
-
- do_blockdev_backup(backup->device, backup->target,
- backup->sync,
- backup->has_speed, backup->speed,
- backup->has_on_source_error, backup->on_source_error,
- backup->has_on_target_error, backup->on_target_error,
- common->block_job_txn, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- }
-
- state->job = state->bs->job;
-}
-
-static void blockdev_backup_abort(BlkActionState *common)
-{
- BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, 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 blockdev_backup_clean(BlkActionState *common)
-{
- BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
-
- if (state->aio_context) {
- bdrv_drained_end(state->bs);
- aio_context_release(state->aio_context);
- }
-}
-
-typedef struct BlockDirtyBitmapState {
- BlkActionState common;
- BdrvDirtyBitmap *bitmap;
- BlockDriverState *bs;
- AioContext *aio_context;
- HBitmap *backup;
- bool prepared;
-} BlockDirtyBitmapState;
-
-static void block_dirty_bitmap_add_prepare(BlkActionState *common,
- Error **errp)
-{
- Error *local_err = NULL;
- BlockDirtyBitmapAdd *action;
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
-
- if (action_check_completion_mode(common, errp) < 0) {
- return;
- }
-
- action = common->action->u.block_dirty_bitmap_add.data;
- /* AIO context taken and released within qmp_block_dirty_bitmap_add */
- qmp_block_dirty_bitmap_add(action->node, action->name,
- action->has_granularity, action->granularity,
- &local_err);
-
- if (!local_err) {
- state->prepared = true;
- } else {
- error_propagate(errp, local_err);
- }
-}
-
-static void block_dirty_bitmap_add_abort(BlkActionState *common)
-{
- BlockDirtyBitmapAdd *action;
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
-
- action = common->action->u.block_dirty_bitmap_add.data;
- /* Should not be able to fail: IF the bitmap was added via .prepare(),
- * then the node reference and bitmap name must have been valid.
- */
- if (state->prepared) {
- qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort);
- }
-}
-
-static void block_dirty_bitmap_clear_prepare(BlkActionState *common,
- Error **errp)
-{
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
- BlockDirtyBitmap *action;
-
- if (action_check_completion_mode(common, errp) < 0) {
- return;
- }
-
- action = common->action->u.block_dirty_bitmap_clear.data;
- state->bitmap = block_dirty_bitmap_lookup(action->node,
- action->name,
- &state->bs,
- &state->aio_context,
- errp);
- if (!state->bitmap) {
- return;
- }
-
- if (bdrv_dirty_bitmap_frozen(state->bitmap)) {
- error_setg(errp, "Cannot modify a frozen bitmap");
- return;
- } else if (!bdrv_dirty_bitmap_enabled(state->bitmap)) {
- error_setg(errp, "Cannot clear a disabled bitmap");
- return;
- }
-
- bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
- /* AioContext is released in .clean() */
-}
-
-static void block_dirty_bitmap_clear_abort(BlkActionState *common)
-{
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
-
- bdrv_undo_clear_dirty_bitmap(state->bitmap, state->backup);
-}
-
-static void block_dirty_bitmap_clear_commit(BlkActionState *common)
-{
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
-
- hbitmap_free(state->backup);
-}
-
-static void block_dirty_bitmap_clear_clean(BlkActionState *common)
-{
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
-
- if (state->aio_context) {
- aio_context_release(state->aio_context);
- }
-}
-
-static void abort_prepare(BlkActionState *common, Error **errp)
-{
- error_setg(errp, "Transaction aborted using Abort action");
-}
-
-static void abort_commit(BlkActionState *common)
-{
- g_assert_not_reached(); /* this action never succeeds */
-}
-
-static const BlkActionOps actions[] = {
- [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
- .instance_size = sizeof(ExternalSnapshotState),
- .prepare = external_snapshot_prepare,
- .commit = external_snapshot_commit,
- .abort = external_snapshot_abort,
- .clean = external_snapshot_clean,
- },
- [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
- .instance_size = sizeof(ExternalSnapshotState),
- .prepare = external_snapshot_prepare,
- .commit = external_snapshot_commit,
- .abort = external_snapshot_abort,
- .clean = external_snapshot_clean,
- },
- [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
- .instance_size = sizeof(DriveBackupState),
- .prepare = drive_backup_prepare,
- .abort = drive_backup_abort,
- .clean = drive_backup_clean,
- },
- [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
- .instance_size = sizeof(BlockdevBackupState),
- .prepare = blockdev_backup_prepare,
- .abort = blockdev_backup_abort,
- .clean = blockdev_backup_clean,
- },
- [TRANSACTION_ACTION_KIND_ABORT] = {
- .instance_size = sizeof(BlkActionState),
- .prepare = abort_prepare,
- .commit = abort_commit,
- },
- [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
- .instance_size = sizeof(InternalSnapshotState),
- .prepare = internal_snapshot_prepare,
- .abort = internal_snapshot_abort,
- .clean = internal_snapshot_clean,
- },
- [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
- .instance_size = sizeof(BlockDirtyBitmapState),
- .prepare = block_dirty_bitmap_add_prepare,
- .abort = block_dirty_bitmap_add_abort,
- },
- [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
- .instance_size = sizeof(BlockDirtyBitmapState),
- .prepare = block_dirty_bitmap_clear_prepare,
- .commit = block_dirty_bitmap_clear_commit,
- .abort = block_dirty_bitmap_clear_abort,
- .clean = block_dirty_bitmap_clear_clean,
- }
-};
-
-/**
- * Allocate a TransactionProperties structure if necessary, and fill
- * that structure with desired defaults if they are unset.
- */
-static TransactionProperties *get_transaction_properties(
- TransactionProperties *props)
-{
- if (!props) {
- props = g_new0(TransactionProperties, 1);
- }
-
- if (!props->has_completion_mode) {
- props->has_completion_mode = true;
- props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL;
- }
-
- return props;
-}
-
-/*
- * 'Atomic' group operations. The operations are performed as a set, and if
- * any fail then we roll back all operations in the group.
- */
-void qmp_transaction(TransactionActionList *dev_list,
- bool has_props,
- struct TransactionProperties *props,
- Error **errp)
-{
- TransactionActionList *dev_entry = dev_list;
- BlockJobTxn *block_job_txn = NULL;
- BlkActionState *state, *next;
- Error *local_err = NULL;
-
- QSIMPLEQ_HEAD(snap_bdrv_states, BlkActionState) snap_bdrv_states;
- QSIMPLEQ_INIT(&snap_bdrv_states);
-
- /* Does this transaction get canceled as a group on failure?
- * If not, we don't really need to make a BlockJobTxn.
- */
- props = get_transaction_properties(props);
- if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
- block_job_txn = block_job_txn_new();
- }
-
- /* drain all i/o before any operations */
- bdrv_drain_all();
-
- /* We don't do anything in this loop that commits us to the operations */
- while (NULL != dev_entry) {
- TransactionAction *dev_info = NULL;
- const BlkActionOps *ops;
-
- dev_info = dev_entry->value;
- dev_entry = dev_entry->next;
-
- assert(dev_info->type < ARRAY_SIZE(actions));
-
- ops = &actions[dev_info->type];
- assert(ops->instance_size > 0);
-
- state = g_malloc0(ops->instance_size);
- state->ops = ops;
- state->action = dev_info;
- state->block_job_txn = block_job_txn;
- state->txn_props = props;
- QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
-
- state->ops->prepare(state, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- goto delete_and_fail;
- }
- }
-
- QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
- if (state->ops->commit) {
- state->ops->commit(state);
- }
- }
-
- /* success */
- goto exit;
-
-delete_and_fail:
- /* failure, and it is all-or-none; roll back all operations */
- QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
- if (state->ops->abort) {
- state->ops->abort(state);
- }
- }
-exit:
- QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
- if (state->ops->clean) {
- state->ops->clean(state);
- }
- g_free(state);
- }
- if (!has_props) {
- qapi_free_TransactionProperties(props);
- }
- block_job_txn_unref(block_job_txn);
-}
-
-void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
-{
- Error *local_err = NULL;
-
- qmp_blockdev_open_tray(device, has_force, force, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- }
-
- qmp_x_blockdev_remove_medium(device, errp);
-}
-
-void qmp_block_passwd(bool has_device, const char *device,
- bool has_node_name, const char *node_name,
- const char *password, Error **errp)
-{
- Error *local_err = NULL;
- BlockDriverState *bs;
- AioContext *aio_context;
-
- bs = bdrv_lookup_bs(has_device ? device : NULL,
- has_node_name ? node_name : NULL,
- &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- }
-
- aio_context = bdrv_get_aio_context(bs);
- aio_context_acquire(aio_context);
-
- bdrv_add_key(bs, password, errp);
-
- aio_context_release(aio_context);
-}
-
-void qmp_blockdev_open_tray(const char *device, bool has_force, bool force,
- Error **errp)
-{
- BlockBackend *blk;
- bool locked;
-
- if (!has_force) {
- force = false;
- }
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return;
- }
-
- if (!blk_dev_has_removable_media(blk)) {
- error_setg(errp, "Device '%s' is not removable", device);
- return;
- }
-
- if (!blk_dev_has_tray(blk)) {
- /* Ignore this command on tray-less devices */
- return;
- }
-
- if (blk_dev_is_tray_open(blk)) {
- return;
- }
-
- locked = blk_dev_is_medium_locked(blk);
- if (locked) {
- blk_dev_eject_request(blk, force);
- }
-
- if (!locked || force) {
- blk_dev_change_media_cb(blk, false);
- }
-}
-
-void qmp_blockdev_close_tray(const char *device, Error **errp)
-{
- BlockBackend *blk;
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return;
- }
-
- if (!blk_dev_has_removable_media(blk)) {
- error_setg(errp, "Device '%s' is not removable", device);
- return;
- }
-
- if (!blk_dev_has_tray(blk)) {
- /* Ignore this command on tray-less devices */
- return;
- }
-
- if (!blk_dev_is_tray_open(blk)) {
- return;
- }
-
- blk_dev_change_media_cb(blk, true);
-}
-
-void qmp_x_blockdev_remove_medium(const char *device, Error **errp)
-{
- BlockBackend *blk;
- BlockDriverState *bs;
- AioContext *aio_context;
- bool has_device;
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return;
- }
-
- /* For BBs without a device, we can exchange the BDS tree at will */
- has_device = blk_get_attached_dev(blk);
-
- if (has_device && !blk_dev_has_removable_media(blk)) {
- error_setg(errp, "Device '%s' is not removable", device);
- return;
- }
-
- if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
- error_setg(errp, "Tray of device '%s' is not open", device);
- return;
- }
-
- bs = blk_bs(blk);
- if (!bs) {
- return;
- }
-
- aio_context = bdrv_get_aio_context(bs);
- aio_context_acquire(aio_context);
-
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
- goto out;
- }
-
- blk_remove_bs(blk);
-
- if (!blk_dev_has_tray(blk)) {
- /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
- * called at all); therefore, the medium needs to be ejected here.
- * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
- * value passed here (i.e. false). */
- blk_dev_change_media_cb(blk, false);
- }
-
-out:
- aio_context_release(aio_context);
-}
-
-static void qmp_blockdev_insert_anon_medium(const char *device,
- BlockDriverState *bs, Error **errp)
-{
- BlockBackend *blk;
- bool has_device;
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return;
- }
-
- /* For BBs without a device, we can exchange the BDS tree at will */
- has_device = blk_get_attached_dev(blk);
-
- if (has_device && !blk_dev_has_removable_media(blk)) {
- error_setg(errp, "Device '%s' is not removable", device);
- return;
- }
-
- if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
- error_setg(errp, "Tray of device '%s' is not open", device);
- return;
- }
-
- if (blk_bs(blk)) {
- error_setg(errp, "There already is a medium in device '%s'", device);
- return;
- }
-
- blk_insert_bs(blk, bs);
-
- if (!blk_dev_has_tray(blk)) {
- /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
- * called at all); therefore, the medium needs to be pushed into the
- * slot here.
- * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
- * value passed here (i.e. true). */
- blk_dev_change_media_cb(blk, true);
- }
-}
-
-void qmp_x_blockdev_insert_medium(const char *device, const char *node_name,
- Error **errp)
-{
- BlockDriverState *bs;
-
- bs = bdrv_find_node(node_name);
- if (!bs) {
- error_setg(errp, "Node '%s' not found", node_name);
- return;
- }
-
- if (bs->blk) {
- error_setg(errp, "Node '%s' is already in use by '%s'", node_name,
- blk_name(bs->blk));
- return;
- }
-
- qmp_blockdev_insert_anon_medium(device, bs, errp);
-}
-
-void qmp_blockdev_change_medium(const char *device, const char *filename,
- bool has_format, const char *format,
- bool has_read_only,
- BlockdevChangeReadOnlyMode read_only,
- Error **errp)
-{
- BlockBackend *blk;
- BlockDriverState *medium_bs = NULL;
- int bdrv_flags, ret;
- QDict *options = NULL;
- Error *err = NULL;
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- goto fail;
- }
-
- if (blk_bs(blk)) {
- blk_update_root_state(blk);
- }
-
- bdrv_flags = blk_get_open_flags_from_root_state(blk);
- bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING |
- BDRV_O_PROTOCOL);
-
- if (!has_read_only) {
- read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
- }
-
- switch (read_only) {
- case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
- break;
-
- case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
- bdrv_flags &= ~BDRV_O_RDWR;
- break;
-
- case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
- bdrv_flags |= BDRV_O_RDWR;
- break;
-
- default:
- abort();
- }
-
- if (has_format) {
- options = qdict_new();
- qdict_put(options, "driver", qstring_from_str(format));
- }
-
- assert(!medium_bs);
- ret = bdrv_open(&medium_bs, filename, NULL, options, bdrv_flags, errp);
- if (ret < 0) {
- goto fail;
- }
-
- blk_apply_root_state(blk, medium_bs);
-
- bdrv_add_key(medium_bs, NULL, &err);
- if (err) {
- error_propagate(errp, err);
- goto fail;
- }
-
- qmp_blockdev_open_tray(device, false, false, &err);
- if (err) {
- error_propagate(errp, err);
- goto fail;
- }
-
- qmp_x_blockdev_remove_medium(device, &err);
- if (err) {
- error_propagate(errp, err);
- goto fail;
- }
-
- qmp_blockdev_insert_anon_medium(device, medium_bs, &err);
- if (err) {
- error_propagate(errp, err);
- goto fail;
- }
-
- qmp_blockdev_close_tray(device, errp);
-
-fail:
- /* If the medium has been inserted, the device has its own reference, so
- * ours must be relinquished; and if it has not been inserted successfully,
- * the reference must be relinquished anyway */
- bdrv_unref(medium_bs);
-}
-
-/* throttling disk I/O limits */
-void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
- int64_t bps_wr,
- int64_t iops,
- int64_t iops_rd,
- int64_t iops_wr,
- bool has_bps_max,
- int64_t bps_max,
- bool has_bps_rd_max,
- int64_t bps_rd_max,
- bool has_bps_wr_max,
- int64_t bps_wr_max,
- bool has_iops_max,
- int64_t iops_max,
- bool has_iops_rd_max,
- int64_t iops_rd_max,
- bool has_iops_wr_max,
- int64_t iops_wr_max,
- bool has_bps_max_length,
- int64_t bps_max_length,
- bool has_bps_rd_max_length,
- int64_t bps_rd_max_length,
- bool has_bps_wr_max_length,
- int64_t bps_wr_max_length,
- bool has_iops_max_length,
- int64_t iops_max_length,
- bool has_iops_rd_max_length,
- int64_t iops_rd_max_length,
- bool has_iops_wr_max_length,
- int64_t iops_wr_max_length,
- bool has_iops_size,
- int64_t iops_size,
- bool has_group,
- const char *group, Error **errp)
-{
- ThrottleConfig cfg;
- BlockDriverState *bs;
- BlockBackend *blk;
- AioContext *aio_context;
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return;
- }
-
- aio_context = blk_get_aio_context(blk);
- aio_context_acquire(aio_context);
-
- bs = blk_bs(blk);
- if (!bs) {
- error_setg(errp, "Device '%s' has no medium", device);
- goto out;
- }
-
- /* The BlockBackend must be the only parent */
- assert(QLIST_FIRST(&bs->parents));
- if (QLIST_NEXT(QLIST_FIRST(&bs->parents), next_parent)) {
- error_setg(errp, "Cannot throttle device with multiple parents");
- goto out;
- }
-
- throttle_config_init(&cfg);
- cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
- cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
- cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;
-
- cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
- cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
- cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
-
- if (has_bps_max) {
- cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
- }
- if (has_bps_rd_max) {
- cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
- }
- if (has_bps_wr_max) {
- cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
- }
- if (has_iops_max) {
- cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
- }
- if (has_iops_rd_max) {
- cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
- }
- if (has_iops_wr_max) {
- cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
- }
-
- if (has_bps_max_length) {
- cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = bps_max_length;
- }
- if (has_bps_rd_max_length) {
- cfg.buckets[THROTTLE_BPS_READ].burst_length = bps_rd_max_length;
- }
- if (has_bps_wr_max_length) {
- cfg.buckets[THROTTLE_BPS_WRITE].burst_length = bps_wr_max_length;
- }
- if (has_iops_max_length) {
- cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = iops_max_length;
- }
- if (has_iops_rd_max_length) {
- cfg.buckets[THROTTLE_OPS_READ].burst_length = iops_rd_max_length;
- }
- if (has_iops_wr_max_length) {
- cfg.buckets[THROTTLE_OPS_WRITE].burst_length = iops_wr_max_length;
- }
-
- if (has_iops_size) {
- cfg.op_size = iops_size;
- }
-
- if (!throttle_is_valid(&cfg, errp)) {
- goto out;
- }
-
- if (throttle_enabled(&cfg)) {
- /* Enable I/O limits if they're not enabled yet, otherwise
- * just update the throttling group. */
- if (!bs->throttle_state) {
- bdrv_io_limits_enable(bs, has_group ? group : device);
- } else if (has_group) {
- bdrv_io_limits_update_group(bs, group);
- }
- /* Set the new throttling configuration */
- bdrv_set_io_limits(bs, &cfg);
- } else if (bs->throttle_state) {
- /* If all throttling settings are set to 0, disable I/O limits */
- bdrv_io_limits_disable(bs);
- }
-
-out:
- aio_context_release(aio_context);
-}
-
-void qmp_block_dirty_bitmap_add(const char *node, const char *name,
- bool has_granularity, uint32_t granularity,
- Error **errp)
-{
- AioContext *aio_context;
- BlockDriverState *bs;
-
- if (!name || name[0] == '\0') {
- error_setg(errp, "Bitmap name cannot be empty");
- return;
- }
-
- bs = bdrv_lookup_bs(node, node, errp);
- if (!bs) {
- return;
- }
-
- aio_context = bdrv_get_aio_context(bs);
- aio_context_acquire(aio_context);
-
- if (has_granularity) {
- if (granularity < 512 || !is_power_of_2(granularity)) {
- error_setg(errp, "Granularity must be power of 2 "
- "and at least 512");
- goto out;
- }
- } else {
- /* Default to cluster size, if available: */
- granularity = bdrv_get_default_bitmap_granularity(bs);
- }
-
- bdrv_create_dirty_bitmap(bs, granularity, name, errp);
-
- out:
- aio_context_release(aio_context);
-}
-
-void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
- Error **errp)
-{
- AioContext *aio_context;
- BlockDriverState *bs;
- BdrvDirtyBitmap *bitmap;
-
- bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
- if (!bitmap || !bs) {
- return;
- }
-
- if (bdrv_dirty_bitmap_frozen(bitmap)) {
- error_setg(errp,
- "Bitmap '%s' is currently frozen and cannot be removed",
- name);
- goto out;
- }
- bdrv_dirty_bitmap_make_anon(bitmap);
- bdrv_release_dirty_bitmap(bs, bitmap);
-
- out:
- aio_context_release(aio_context);
-}
-
-/**
- * Completely clear a bitmap, for the purposes of synchronizing a bitmap
- * immediately after a full backup operation.
- */
-void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
- Error **errp)
-{
- AioContext *aio_context;
- BdrvDirtyBitmap *bitmap;
- BlockDriverState *bs;
-
- bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
- if (!bitmap || !bs) {
- return;
- }
-
- if (bdrv_dirty_bitmap_frozen(bitmap)) {
- error_setg(errp,
- "Bitmap '%s' is currently frozen and cannot be modified",
- name);
- goto out;
- } else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
- error_setg(errp,
- "Bitmap '%s' is currently disabled and cannot be cleared",
- name);
- goto out;
- }
-
- bdrv_clear_dirty_bitmap(bitmap, NULL);
-
- out:
- aio_context_release(aio_context);
-}
-
-void hmp_drive_del(Monitor *mon, const QDict *qdict)
-{
- const char *id = qdict_get_str(qdict, "id");
- BlockBackend *blk;
- BlockDriverState *bs;
- AioContext *aio_context;
- Error *local_err = NULL;
-
- bs = bdrv_find_node(id);
- if (bs) {
- qmp_x_blockdev_del(false, NULL, true, id, &local_err);
- if (local_err) {
- error_report_err(local_err);
- }
- return;
- }
-
- blk = blk_by_name(id);
- if (!blk) {
- error_report("Device '%s' not found", id);
- return;
- }
-
- if (!blk_legacy_dinfo(blk)) {
- error_report("Deleting device added with blockdev-add"
- " is not supported");
- return;
- }
-
- aio_context = blk_get_aio_context(blk);
- aio_context_acquire(aio_context);
-
- bs = blk_bs(blk);
- if (bs) {
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
- error_report_err(local_err);
- aio_context_release(aio_context);
- return;
- }
-
- blk_remove_bs(blk);
- }
-
- /* Make the BlockBackend and the attached BlockDriverState anonymous */
- monitor_remove_blk(blk);
-
- /* If this BlockBackend has a device attached to it, its refcount will be
- * decremented when the device is removed; otherwise we have to do so here.
- */
- if (blk_get_attached_dev(blk)) {
- /* Further I/O must not pause the guest */
- blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
- BLOCKDEV_ON_ERROR_REPORT);
- } else {
- blk_unref(blk);
- }
-
- aio_context_release(aio_context);
-}
-
-void qmp_block_resize(bool has_device, const char *device,
- bool has_node_name, const char *node_name,
- int64_t size, Error **errp)
-{
- Error *local_err = NULL;
- BlockDriverState *bs;
- AioContext *aio_context;
- int ret;
-
- bs = bdrv_lookup_bs(has_device ? device : NULL,
- has_node_name ? node_name : NULL,
- &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- }
-
- aio_context = bdrv_get_aio_context(bs);
- aio_context_acquire(aio_context);
-
- if (!bdrv_is_first_non_filter(bs)) {
- error_setg(errp, QERR_FEATURE_DISABLED, "resize");
- goto out;
- }
-
- if (size < 0) {
- error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
- goto out;
- }
-
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
- error_setg(errp, QERR_DEVICE_IN_USE, device);
- goto out;
- }
-
- /* 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_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
- break;
- case -ENOTSUP:
- error_setg(errp, QERR_UNSUPPORTED);
- break;
- case -EACCES:
- error_setg(errp, "Device '%s' is read only", device);
- break;
- case -EBUSY:
- error_setg(errp, QERR_DEVICE_IN_USE, device);
- break;
- default:
- error_setg_errno(errp, -ret, "Could not resize");
- break;
- }
-
-out:
- aio_context_release(aio_context);
-}
-
-static void block_job_cb(void *opaque, int ret)
-{
- /* Note that this function may be executed from another AioContext besides
- * the QEMU main loop. If you need to access anything that assumes the
- * QEMU global mutex, use a BH or introduce a mutex.
- */
-
- BlockDriverState *bs = opaque;
- const char *msg = NULL;
-
- trace_block_job_cb(bs, bs->job, ret);
-
- assert(bs->job);
-
- if (ret < 0) {
- msg = strerror(-ret);
- }
-
- if (block_job_is_cancelled(bs->job)) {
- block_job_event_cancelled(bs->job);
- } else {
- block_job_event_completed(bs->job, msg);
- }
-}
-
-void qmp_block_stream(const char *device,
- bool has_base, const char *base,
- bool has_backing_file, const char *backing_file,
- bool has_speed, int64_t speed,
- bool has_on_error, BlockdevOnError on_error,
- Error **errp)
-{
- BlockBackend *blk;
- BlockDriverState *bs;
- BlockDriverState *base_bs = NULL;
- AioContext *aio_context;
- Error *local_err = NULL;
- const char *base_name = NULL;
-
- if (!has_on_error) {
- on_error = BLOCKDEV_ON_ERROR_REPORT;
- }
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return;
- }
-
- aio_context = blk_get_aio_context(blk);
- aio_context_acquire(aio_context);
-
- if (!blk_is_available(blk)) {
- error_setg(errp, "Device '%s' has no medium", device);
- goto out;
- }
- bs = blk_bs(blk);
-
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) {
- goto out;
- }
-
- if (has_base) {
- base_bs = bdrv_find_backing_image(bs, base);
- if (base_bs == NULL) {
- error_setg(errp, QERR_BASE_NOT_FOUND, base);
- goto out;
- }
- assert(bdrv_get_aio_context(base_bs) == aio_context);
- base_name = base;
- }
-
- /* if we are streaming the entire chain, the result will have no backing
- * file, and specifying one is therefore an error */
- if (base_bs == NULL && has_backing_file) {
- error_setg(errp, "backing file specified, but streaming the "
- "entire chain");
- goto out;
- }
-
- /* backing_file string overrides base bs filename */
- base_name = has_backing_file ? backing_file : base_name;
-
- stream_start(bs, base_bs, base_name, has_speed ? speed : 0,
- on_error, block_job_cb, bs, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- goto out;
- }
-
- trace_qmp_block_stream(bs, bs->job);
-
-out:
- aio_context_release(aio_context);
-}
-
-void qmp_block_commit(const char *device,
- bool has_base, const char *base,
- bool has_top, const char *top,
- bool has_backing_file, const char *backing_file,
- bool has_speed, int64_t speed,
- Error **errp)
-{
- BlockBackend *blk;
- BlockDriverState *bs;
- BlockDriverState *base_bs, *top_bs;
- AioContext *aio_context;
- Error *local_err = NULL;
- /* This will be part of the QMP command, if/when the
- * BlockdevOnError change for blkmirror makes it in
- */
- BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
-
- if (!has_speed) {
- speed = 0;
- }
-
- /* Important Note:
- * libvirt relies on the DeviceNotFound error class in order to probe for
- * live commit feature versions; for this to work, we must make sure to
- * perform the device lookup before any generic errors that may occur in a
- * scenario in which all optional arguments are omitted. */
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return;
- }
-
- aio_context = blk_get_aio_context(blk);
- aio_context_acquire(aio_context);
-
- if (!blk_is_available(blk)) {
- error_setg(errp, "Device '%s' has no medium", device);
- goto out;
- }
- bs = blk_bs(blk);
-
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
- goto out;
- }
-
- /* default top_bs is the active layer */
- top_bs = bs;
-
- if (has_top && top) {
- if (strcmp(bs->filename, top) != 0) {
- top_bs = bdrv_find_backing_image(bs, top);
- }
- }
-
- if (top_bs == NULL) {
- error_setg(errp, "Top image file %s not found", top ? top : "NULL");
- goto out;
- }
-
- assert(bdrv_get_aio_context(top_bs) == aio_context);
-
- if (has_base && base) {
- base_bs = bdrv_find_backing_image(top_bs, base);
- } else {
- base_bs = bdrv_find_base(top_bs);
- }
-
- if (base_bs == NULL) {
- error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
- goto out;
- }
-
- assert(bdrv_get_aio_context(base_bs) == aio_context);
-
- if (bdrv_op_is_blocked(base_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
- goto out;
- }
-
- /* Do not allow attempts to commit an image into itself */
- if (top_bs == base_bs) {
- error_setg(errp, "cannot commit an image into itself");
- goto out;
- }
-
- if (top_bs == bs) {
- if (has_backing_file) {
- error_setg(errp, "'backing-file' specified,"
- " but 'top' is the active layer");
- goto out;
- }
- commit_active_start(bs, base_bs, speed, on_error, block_job_cb,
- bs, &local_err);
- } else {
- commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
- has_backing_file ? backing_file : NULL, &local_err);
- }
- if (local_err != NULL) {
- error_propagate(errp, local_err);
- goto out;
- }
-
-out:
- aio_context_release(aio_context);
-}
-
-static void do_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_bitmap, const char *bitmap,
- bool has_on_source_error,
- BlockdevOnError on_source_error,
- bool has_on_target_error,
- BlockdevOnError on_target_error,
- BlockJobTxn *txn, Error **errp)
-{
- BlockBackend *blk;
- BlockDriverState *bs;
- BlockDriverState *target_bs;
- BlockDriverState *source = NULL;
- BdrvDirtyBitmap *bmap = NULL;
- AioContext *aio_context;
- QDict *options = NULL;
- Error *local_err = NULL;
- int flags;
- int64_t size;
- int ret;
-
- 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;
- }
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return;
- }
-
- aio_context = blk_get_aio_context(blk);
- aio_context_acquire(aio_context);
-
- /* Although backup_run has this check too, we need to use bs->drv below, so
- * do an early check redundantly. */
- if (!blk_is_available(blk)) {
- error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
- goto out;
- }
- bs = blk_bs(blk);
-
- if (!has_format) {
- format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
- }
-
- /* Early check to avoid creating target */
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
- goto out;
- }
-
- flags = bs->open_flags | BDRV_O_RDWR;
-
- /* See if we have a backing HD we can use to create our new image
- * on top of. */
- if (sync == MIRROR_SYNC_MODE_TOP) {
- source = backing_bs(bs);
- if (!source) {
- sync = MIRROR_SYNC_MODE_FULL;
- }
- }
- if (sync == MIRROR_SYNC_MODE_NONE) {
- source = bs;
- }
-
- size = bdrv_getlength(bs);
- if (size < 0) {
- error_setg_errno(errp, -size, "bdrv_getlength failed");
- goto out;
- }
-
- if (mode != NEW_IMAGE_MODE_EXISTING) {
- assert(format);
- if (source) {
- bdrv_img_create(target, format, source->filename,
- source->drv->format_name, NULL,
- size, flags, &local_err, false);
- } else {
- bdrv_img_create(target, format, NULL, NULL, NULL,
- size, flags, &local_err, false);
- }
- }
-
- if (local_err) {
- error_propagate(errp, local_err);
- goto out;
- }
-
- if (format) {
- options = qdict_new();
- qdict_put(options, "driver", qstring_from_str(format));
- }
-
- target_bs = NULL;
- ret = bdrv_open(&target_bs, target, NULL, options, flags, &local_err);
- if (ret < 0) {
- error_propagate(errp, local_err);
- goto out;
- }
-
- bdrv_set_aio_context(target_bs, aio_context);
-
- if (has_bitmap) {
- bmap = bdrv_find_dirty_bitmap(bs, bitmap);
- if (!bmap) {
- error_setg(errp, "Bitmap '%s' could not be found", bitmap);
- bdrv_unref(target_bs);
- goto out;
- }
- }
-
- backup_start(bs, target_bs, speed, sync, bmap,
- on_source_error, on_target_error,
- block_job_cb, bs, txn, &local_err);
- if (local_err != NULL) {
- bdrv_unref(target_bs);
- error_propagate(errp, local_err);
- goto out;
- }
-
-out:
- aio_context_release(aio_context);
-}
-
-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_bitmap, const char *bitmap,
- bool has_on_source_error, BlockdevOnError on_source_error,
- bool has_on_target_error, BlockdevOnError on_target_error,
- Error **errp)
-{
- return do_drive_backup(device, target, has_format, format, sync,
- has_mode, mode, has_speed, speed,
- has_bitmap, bitmap,
- has_on_source_error, on_source_error,
- has_on_target_error, on_target_error,
- NULL, errp);
-}
-
-BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
-{
- return bdrv_named_nodes_list(errp);
-}
-
-void do_blockdev_backup(const char *device, const char *target,
- enum MirrorSyncMode sync,
- bool has_speed, int64_t speed,
- bool has_on_source_error,
- BlockdevOnError on_source_error,
- bool has_on_target_error,
- BlockdevOnError on_target_error,
- BlockJobTxn *txn, Error **errp)
-{
- BlockBackend *blk, *target_blk;
- BlockDriverState *bs;
- BlockDriverState *target_bs;
- Error *local_err = NULL;
- AioContext *aio_context;
-
- 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;
- }
-
- blk = blk_by_name(device);
- if (!blk) {
- error_setg(errp, "Device '%s' not found", device);
- return;
- }
-
- aio_context = blk_get_aio_context(blk);
- aio_context_acquire(aio_context);
-
- if (!blk_is_available(blk)) {
- error_setg(errp, "Device '%s' has no medium", device);
- goto out;
- }
- bs = blk_bs(blk);
-
- target_blk = blk_by_name(target);
- if (!target_blk) {
- error_setg(errp, "Device '%s' not found", target);
- goto out;
- }
-
- if (!blk_is_available(target_blk)) {
- error_setg(errp, "Device '%s' has no medium", target);
- goto out;
- }
- target_bs = blk_bs(target_blk);
-
- bdrv_ref(target_bs);
- bdrv_set_aio_context(target_bs, aio_context);
- backup_start(bs, target_bs, speed, sync, NULL, on_source_error,
- on_target_error, block_job_cb, bs, txn, &local_err);
- if (local_err != NULL) {
- bdrv_unref(target_bs);
- error_propagate(errp, local_err);
- }
-out:
- aio_context_release(aio_context);
-}
-
-void qmp_blockdev_backup(const char *device, const char *target,
- enum MirrorSyncMode sync,
- 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)
-{
- do_blockdev_backup(device, target, sync, has_speed, speed,
- has_on_source_error, on_source_error,
- has_on_target_error, on_target_error,
- NULL, errp);
-}
-
-/* Parameter check and block job starting for drive mirroring.
- * Caller should hold @device and @target's aio context (must be the same).
- **/
-static void blockdev_mirror_common(BlockDriverState *bs,
- BlockDriverState *target,
- bool has_replaces, const char *replaces,
- enum MirrorSyncMode sync,
- 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,
- bool has_unmap, bool unmap,
- Error **errp)
-{
-
- 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_granularity) {
- granularity = 0;
- }
- if (!has_buf_size) {
- buf_size = 0;
- }
- if (!has_unmap) {
- unmap = true;
- }
-
- if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
- error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
- "a value in range [512B, 64MB]");
- return;
- }
- if (granularity & (granularity - 1)) {
- error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
- "power of 2");
- return;
- }
-
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
- return;
- }
- if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
- return;
- }
- if (target->blk) {
- error_setg(errp, "Cannot mirror to an attached block device");
- return;
- }
-
- if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) {
- sync = MIRROR_SYNC_MODE_FULL;
- }
-
- /* pass the node name to replace to mirror start since it's loose coupling
- * and will allow to check whether the node still exist at mirror completion
- */
- mirror_start(bs, target,
- has_replaces ? replaces : NULL,
- speed, granularity, buf_size, sync,
- on_source_error, on_target_error, unmap,
- block_job_cb, bs, errp);
-}
-
-void qmp_drive_mirror(const char *device, const char *target,
- bool has_format, const char *format,
- bool has_node_name, const char *node_name,
- bool has_replaces, const char *replaces,
- 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,
- bool has_unmap, bool unmap,
- Error **errp)
-{
- BlockDriverState *bs;
- BlockBackend *blk;
- BlockDriverState *source, *target_bs;
- AioContext *aio_context;
- Error *local_err = NULL;
- QDict *options = NULL;
- int flags;
- int64_t size;
- int ret;
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return;
- }
-
- aio_context = blk_get_aio_context(blk);
- aio_context_acquire(aio_context);
-
- if (!blk_is_available(blk)) {
- error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
- goto out;
- }
- bs = blk_bs(blk);
- if (!has_mode) {
- mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
- }
-
- if (!has_format) {
- format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
- }
-
- flags = bs->open_flags | BDRV_O_RDWR;
- source = backing_bs(bs);
- if (!source && sync == MIRROR_SYNC_MODE_TOP) {
- sync = MIRROR_SYNC_MODE_FULL;
- }
- if (sync == MIRROR_SYNC_MODE_NONE) {
- source = bs;
- }
-
- size = bdrv_getlength(bs);
- if (size < 0) {
- error_setg_errno(errp, -size, "bdrv_getlength failed");
- goto out;
- }
-
- if (has_replaces) {
- BlockDriverState *to_replace_bs;
- AioContext *replace_aio_context;
- int64_t replace_size;
-
- if (!has_node_name) {
- error_setg(errp, "a node-name must be provided when replacing a"
- " named node of the graph");
- goto out;
- }
-
- to_replace_bs = check_to_replace_node(bs, replaces, &local_err);
-
- if (!to_replace_bs) {
- error_propagate(errp, local_err);
- goto out;
- }
-
- replace_aio_context = bdrv_get_aio_context(to_replace_bs);
- aio_context_acquire(replace_aio_context);
- replace_size = bdrv_getlength(to_replace_bs);
- aio_context_release(replace_aio_context);
-
- if (size != replace_size) {
- error_setg(errp, "cannot replace image with a mirror image of "
- "different size");
- goto out;
- }
- }
-
- if ((sync == MIRROR_SYNC_MODE_FULL || !source)
- && mode != NEW_IMAGE_MODE_EXISTING)
- {
- /* create new image w/o backing file */
- assert(format);
- bdrv_img_create(target, format,
- NULL, NULL, NULL, size, flags, &local_err, false);
- } else {
- switch (mode) {
- case NEW_IMAGE_MODE_EXISTING:
- break;
- case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
- /* create new image with backing file */
- bdrv_img_create(target, format,
- source->filename,
- source->drv->format_name,
- NULL, size, flags, &local_err, false);
- break;
- default:
- abort();
- }
- }
-
- if (local_err) {
- error_propagate(errp, local_err);
- goto out;
- }
-
- options = qdict_new();
- if (has_node_name) {
- qdict_put(options, "node-name", qstring_from_str(node_name));
- }
- if (format) {
- qdict_put(options, "driver", qstring_from_str(format));
- }
-
- /* Mirroring takes care of copy-on-write using the source's backing
- * file.
- */
- target_bs = NULL;
- ret = bdrv_open(&target_bs, target, NULL, options,
- flags | BDRV_O_NO_BACKING, &local_err);
- if (ret < 0) {
- error_propagate(errp, local_err);
- goto out;
- }
-
- bdrv_set_aio_context(target_bs, aio_context);
-
- blockdev_mirror_common(bs, target_bs,
- has_replaces, replaces, sync,
- has_speed, speed,
- has_granularity, granularity,
- has_buf_size, buf_size,
- has_on_source_error, on_source_error,
- has_on_target_error, on_target_error,
- has_unmap, unmap,
- &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- bdrv_unref(target_bs);
- }
-out:
- aio_context_release(aio_context);
-}
-
-void qmp_blockdev_mirror(const char *device, const char *target,
- bool has_replaces, const char *replaces,
- MirrorSyncMode sync,
- 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)
-{
- BlockDriverState *bs;
- BlockBackend *blk;
- BlockDriverState *target_bs;
- AioContext *aio_context;
- Error *local_err = NULL;
-
- blk = blk_by_name(device);
- if (!blk) {
- error_setg(errp, "Device '%s' not found", device);
- return;
- }
- bs = blk_bs(blk);
-
- if (!bs) {
- error_setg(errp, "Device '%s' has no media", device);
- return;
- }
-
- target_bs = bdrv_lookup_bs(target, target, errp);
- if (!target_bs) {
- return;
- }
-
- aio_context = bdrv_get_aio_context(bs);
- aio_context_acquire(aio_context);
-
- bdrv_ref(target_bs);
- bdrv_set_aio_context(target_bs, aio_context);
-
- blockdev_mirror_common(bs, target_bs,
- has_replaces, replaces, sync,
- has_speed, speed,
- has_granularity, granularity,
- has_buf_size, buf_size,
- has_on_source_error, on_source_error,
- has_on_target_error, on_target_error,
- true, true,
- &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- bdrv_unref(target_bs);
- }
-
- aio_context_release(aio_context);
-}
-
-/* Get the block job for a given device name and acquire its AioContext */
-static BlockJob *find_block_job(const char *device, AioContext **aio_context,
- Error **errp)
-{
- BlockBackend *blk;
- BlockDriverState *bs;
-
- *aio_context = NULL;
-
- blk = blk_by_name(device);
- if (!blk) {
- goto notfound;
- }
-
- *aio_context = blk_get_aio_context(blk);
- aio_context_acquire(*aio_context);
-
- if (!blk_is_available(blk)) {
- goto notfound;
- }
- bs = blk_bs(blk);
-
- if (!bs->job) {
- goto notfound;
- }
-
- return bs->job;
-
-notfound:
- error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
- "No active block job on device '%s'", device);
- if (*aio_context) {
- aio_context_release(*aio_context);
- *aio_context = NULL;
- }
- return NULL;
-}
-
-void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
-{
- AioContext *aio_context;
- BlockJob *job = find_block_job(device, &aio_context, errp);
-
- if (!job) {
- return;
- }
-
- block_job_set_speed(job, speed, errp);
- aio_context_release(aio_context);
-}
-
-void qmp_block_job_cancel(const char *device,
- bool has_force, bool force, Error **errp)
-{
- AioContext *aio_context;
- BlockJob *job = find_block_job(device, &aio_context, errp);
-
- if (!job) {
- return;
- }
-
- if (!has_force) {
- force = false;
- }
-
- if (job->user_paused && !force) {
- error_setg(errp, "The block job for device '%s' is currently paused",
- device);
- goto out;
- }
-
- trace_qmp_block_job_cancel(job);
- block_job_cancel(job);
-out:
- aio_context_release(aio_context);
-}
-
-void qmp_block_job_pause(const char *device, Error **errp)
-{
- AioContext *aio_context;
- BlockJob *job = find_block_job(device, &aio_context, errp);
-
- if (!job || job->user_paused) {
- return;
- }
-
- job->user_paused = true;
- trace_qmp_block_job_pause(job);
- block_job_pause(job);
- aio_context_release(aio_context);
-}
-
-void qmp_block_job_resume(const char *device, Error **errp)
-{
- AioContext *aio_context;
- BlockJob *job = find_block_job(device, &aio_context, errp);
-
- if (!job || !job->user_paused) {
- return;
- }
-
- job->user_paused = false;
- trace_qmp_block_job_resume(job);
- block_job_resume(job);
- aio_context_release(aio_context);
-}
-
-void qmp_block_job_complete(const char *device, Error **errp)
-{
- AioContext *aio_context;
- BlockJob *job = find_block_job(device, &aio_context, errp);
-
- if (!job) {
- return;
- }
-
- trace_qmp_block_job_complete(job);
- block_job_complete(job, errp);
- aio_context_release(aio_context);
-}
-
-void qmp_change_backing_file(const char *device,
- const char *image_node_name,
- const char *backing_file,
- Error **errp)
-{
- BlockBackend *blk;
- BlockDriverState *bs = NULL;
- AioContext *aio_context;
- BlockDriverState *image_bs = NULL;
- Error *local_err = NULL;
- bool ro;
- int open_flags;
- int ret;
-
- blk = blk_by_name(device);
- if (!blk) {
- error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
- return;
- }
-
- aio_context = blk_get_aio_context(blk);
- aio_context_acquire(aio_context);
-
- if (!blk_is_available(blk)) {
- error_setg(errp, "Device '%s' has no medium", device);
- goto out;
- }
- bs = blk_bs(blk);
-
- image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- goto out;
- }
-
- if (!image_bs) {
- error_setg(errp, "image file not found");
- goto out;
- }
-
- if (bdrv_find_base(image_bs) == image_bs) {
- error_setg(errp, "not allowing backing file change on an image "
- "without a backing file");
- goto out;
- }
-
- /* even though we are not necessarily operating on bs, we need it to
- * determine if block ops are currently prohibited on the chain */
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
- goto out;
- }
-
- /* final sanity check */
- if (!bdrv_chain_contains(bs, image_bs)) {
- error_setg(errp, "'%s' and image file are not in the same chain",
- device);
- goto out;
- }
-
- /* if not r/w, reopen to make r/w */
- open_flags = image_bs->open_flags;
- ro = bdrv_is_read_only(image_bs);
-
- if (ro) {
- bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- goto out;
- }
- }
-
- ret = bdrv_change_backing_file(image_bs, backing_file,
- image_bs->drv ? image_bs->drv->format_name : "");
-
- if (ret < 0) {
- error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
- backing_file);
- /* don't exit here, so we can try to restore open flags if
- * appropriate */
- }
-
- if (ro) {
- bdrv_reopen(image_bs, open_flags, &local_err);
- if (local_err) {
- error_propagate(errp, local_err); /* will preserve prior errp */
- }
- }
-
-out:
- aio_context_release(aio_context);
-}
-
-void hmp_drive_add_node(Monitor *mon, const char *optstr)
-{
- QemuOpts *opts;
- QDict *qdict;
- Error *local_err = NULL;
-
- opts = qemu_opts_parse_noisily(&qemu_drive_opts, optstr, false);
- if (!opts) {
- return;
- }
-
- qdict = qemu_opts_to_qdict(opts, NULL);
-
- if (!qdict_get_try_str(qdict, "node-name")) {
- QDECREF(qdict);
- error_report("'node-name' needs to be specified");
- goto out;
- }
-
- BlockDriverState *bs = bds_tree_init(qdict, &local_err);
- if (!bs) {
- error_report_err(local_err);
- goto out;
- }
-
- QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
-
-out:
- qemu_opts_del(opts);
-}
-
-void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
-{
- QmpOutputVisitor *ov = qmp_output_visitor_new();
- BlockDriverState *bs;
- BlockBackend *blk = NULL;
- QObject *obj;
- QDict *qdict;
- Error *local_err = NULL;
-
- /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with
- * cache.direct=false instead of silently switching to aio=threads, except
- * when called from drive_new().
- *
- * For now, simply forbidding the combination for all drivers will do. */
- if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
- bool direct = options->has_cache &&
- options->cache->has_direct &&
- options->cache->direct;
- if (!direct) {
- error_setg(errp, "aio=native requires cache.direct=true");
- goto fail;
- }
- }
-
- visit_type_BlockdevOptions(qmp_output_get_visitor(ov), NULL, &options,
- &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- goto fail;
- }
-
- obj = qmp_output_get_qobject(ov);
- qdict = qobject_to_qdict(obj);
-
- qdict_flatten(qdict);
-
- if (options->has_id) {
- blk = blockdev_init(NULL, qdict, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- goto fail;
- }
-
- bs = blk_bs(blk);
- } else {
- if (!qdict_get_try_str(qdict, "node-name")) {
- error_setg(errp, "'id' and/or 'node-name' need to be specified for "
- "the root node");
- goto fail;
- }
-
- bs = bds_tree_init(qdict, errp);
- if (!bs) {
- goto fail;
- }
-
- QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
- }
-
- if (bs && bdrv_key_required(bs)) {
- if (blk) {
- monitor_remove_blk(blk);
- blk_unref(blk);
- } else {
- QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
- bdrv_unref(bs);
- }
- error_setg(errp, "blockdev-add doesn't support encrypted devices");
- goto fail;
- }
-
-fail:
- qmp_output_visitor_cleanup(ov);
-}
-
-void qmp_x_blockdev_del(bool has_id, const char *id,
- bool has_node_name, const char *node_name, Error **errp)
-{
- AioContext *aio_context;
- BlockBackend *blk;
- BlockDriverState *bs;
-
- if (has_id && has_node_name) {
- error_setg(errp, "Only one of id and node-name must be specified");
- return;
- } else if (!has_id && !has_node_name) {
- error_setg(errp, "No block device specified");
- return;
- }
-
- if (has_id) {
- /* blk_by_name() never returns a BB that is not owned by the monitor */
- blk = blk_by_name(id);
- if (!blk) {
- error_setg(errp, "Cannot find block backend %s", id);
- return;
- }
- if (blk_legacy_dinfo(blk)) {
- error_setg(errp, "Deleting block backend added with drive-add"
- " is not supported");
- return;
- }
- if (blk_get_refcnt(blk) > 1) {
- error_setg(errp, "Block backend %s is in use", id);
- return;
- }
- bs = blk_bs(blk);
- aio_context = blk_get_aio_context(blk);
- } else {
- bs = bdrv_find_node(node_name);
- if (!bs) {
- error_setg(errp, "Cannot find node %s", node_name);
- return;
- }
- blk = bs->blk;
- if (blk) {
- error_setg(errp, "Node %s is in use by %s",
- node_name, blk_name(blk));
- return;
- }
- aio_context = bdrv_get_aio_context(bs);
- }
-
- aio_context_acquire(aio_context);
-
- if (bs) {
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) {
- goto out;
- }
-
- if (!blk && !bs->monitor_list.tqe_prev) {
- error_setg(errp, "Node %s is not owned by the monitor",
- bs->node_name);
- goto out;
- }
-
- if (bs->refcnt > 1) {
- error_setg(errp, "Block device %s is in use",
- bdrv_get_device_or_node_name(bs));
- goto out;
- }
- }
-
- if (blk) {
- monitor_remove_blk(blk);
- blk_unref(blk);
- } else {
- QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
- bdrv_unref(bs);
- }
-
-out:
- aio_context_release(aio_context);
-}
-
-BlockJobInfoList *qmp_query_block_jobs(Error **errp)
-{
- BlockJobInfoList *head = NULL, **p_next = &head;
- BlockDriverState *bs;
-
- for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
- AioContext *aio_context = bdrv_get_aio_context(bs);
-
- aio_context_acquire(aio_context);
-
- if (bs->job) {
- BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
- elem->value = block_job_query(bs->job);
- *p_next = elem;
- p_next = &elem->next;
- }
-
- aio_context_release(aio_context);
- }
-
- return head;
-}
-
-QemuOptsList qemu_common_drive_opts = {
- .name = "drive",
- .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
- .desc = {
- {
- .name = "snapshot",
- .type = QEMU_OPT_BOOL,
- .help = "enable/disable snapshot mode",
- },{
- .name = "discard",
- .type = QEMU_OPT_STRING,
- .help = "discard operation (ignore/off, unmap/on)",
- },{
- .name = "aio",
- .type = QEMU_OPT_STRING,
- .help = "host AIO implementation (threads, native)",
- },{
- .name = BDRV_OPT_CACHE_WB,
- .type = QEMU_OPT_BOOL,
- .help = "Enable writeback mode",
- },{
- .name = "format",
- .type = QEMU_OPT_STRING,
- .help = "disk format (raw, qcow2, ...)",
- },{
- .name = "rerror",
- .type = QEMU_OPT_STRING,
- .help = "read error action",
- },{
- .name = "werror",
- .type = QEMU_OPT_STRING,
- .help = "write error action",
- },{
- .name = "read-only",
- .type = QEMU_OPT_BOOL,
- .help = "open drive file as read-only",
- },{
- .name = "throttling.iops-total",
- .type = QEMU_OPT_NUMBER,
- .help = "limit total I/O operations per second",
- },{
- .name = "throttling.iops-read",
- .type = QEMU_OPT_NUMBER,
- .help = "limit read operations per second",
- },{
- .name = "throttling.iops-write",
- .type = QEMU_OPT_NUMBER,
- .help = "limit write operations per second",
- },{
- .name = "throttling.bps-total",
- .type = QEMU_OPT_NUMBER,
- .help = "limit total bytes per second",
- },{
- .name = "throttling.bps-read",
- .type = QEMU_OPT_NUMBER,
- .help = "limit read bytes per second",
- },{
- .name = "throttling.bps-write",
- .type = QEMU_OPT_NUMBER,
- .help = "limit write bytes per second",
- },{
- .name = "throttling.iops-total-max",
- .type = QEMU_OPT_NUMBER,
- .help = "I/O operations burst",
- },{
- .name = "throttling.iops-read-max",
- .type = QEMU_OPT_NUMBER,
- .help = "I/O operations read burst",
- },{
- .name = "throttling.iops-write-max",
- .type = QEMU_OPT_NUMBER,
- .help = "I/O operations write burst",
- },{
- .name = "throttling.bps-total-max",
- .type = QEMU_OPT_NUMBER,
- .help = "total bytes burst",
- },{
- .name = "throttling.bps-read-max",
- .type = QEMU_OPT_NUMBER,
- .help = "total bytes read burst",
- },{
- .name = "throttling.bps-write-max",
- .type = QEMU_OPT_NUMBER,
- .help = "total bytes write burst",
- },{
- .name = "throttling.iops-total-max-length",
- .type = QEMU_OPT_NUMBER,
- .help = "length of the iops-total-max burst period, in seconds",
- },{
- .name = "throttling.iops-read-max-length",
- .type = QEMU_OPT_NUMBER,
- .help = "length of the iops-read-max burst period, in seconds",
- },{
- .name = "throttling.iops-write-max-length",
- .type = QEMU_OPT_NUMBER,
- .help = "length of the iops-write-max burst period, in seconds",
- },{
- .name = "throttling.bps-total-max-length",
- .type = QEMU_OPT_NUMBER,
- .help = "length of the bps-total-max burst period, in seconds",
- },{
- .name = "throttling.bps-read-max-length",
- .type = QEMU_OPT_NUMBER,
- .help = "length of the bps-read-max burst period, in seconds",
- },{
- .name = "throttling.bps-write-max-length",
- .type = QEMU_OPT_NUMBER,
- .help = "length of the bps-write-max burst period, in seconds",
- },{
- .name = "throttling.iops-size",
- .type = QEMU_OPT_NUMBER,
- .help = "when limiting by iops max size of an I/O in bytes",
- },{
- .name = "throttling.group",
- .type = QEMU_OPT_STRING,
- .help = "name of the block throttling group",
- },{
- .name = "copy-on-read",
- .type = QEMU_OPT_BOOL,
- .help = "copy read data from backing file into image file",
- },{
- .name = "detect-zeroes",
- .type = QEMU_OPT_STRING,
- .help = "try to optimize zero writes (off, on, unmap)",
- },{
- .name = "stats-account-invalid",
- .type = QEMU_OPT_BOOL,
- .help = "whether to account for invalid I/O operations "
- "in the statistics",
- },{
- .name = "stats-account-failed",
- .type = QEMU_OPT_BOOL,
- .help = "whether to account for failed I/O operations "
- "in the statistics",
- },
- { /* end of list */ }
- },
-};
-
-static QemuOptsList qemu_root_bds_opts = {
- .name = "root-bds",
- .head = QTAILQ_HEAD_INITIALIZER(qemu_root_bds_opts.head),
- .desc = {
- {
- .name = "discard",
- .type = QEMU_OPT_STRING,
- .help = "discard operation (ignore/off, unmap/on)",
- },{
- .name = "aio",
- .type = QEMU_OPT_STRING,
- .help = "host AIO implementation (threads, native)",
- },{
- .name = "read-only",
- .type = QEMU_OPT_BOOL,
- .help = "open drive file as read-only",
- },{
- .name = "copy-on-read",
- .type = QEMU_OPT_BOOL,
- .help = "copy read data from backing file into image file",
- },{
- .name = "detect-zeroes",
- .type = QEMU_OPT_STRING,
- .help = "try to optimize zero writes (off, on, unmap)",
- },
- { /* 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 */ }
- },
-};