| /* |
| * 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 "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" |
| |
| 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) { |
| 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; |
| } |
| |
| static bool check_throttle_config(ThrottleConfig *cfg, Error **errp) |
| { |
| if (throttle_conflicting(cfg)) { |
| error_setg(errp, "bps/iops/max total values and read/write values" |
| " cannot be used at the same time"); |
| return false; |
| } |
| |
| if (!throttle_is_valid(cfg)) { |
| error_setg(errp, "bps/iops/maxs values must be 0 or greater"); |
| return false; |
| } |
| |
| if (throttle_max_is_missing_limit(cfg)) { |
| error_setg(errp, "bps_max/iops_max require corresponding" |
| " bps/iops values"); |
| 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 (qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true)) { |
| *bdrv_flags |= BDRV_O_CACHE_WB; |
| } |
| if (qemu_opt_get_bool(opts, BDRV_OPT_CACHE_DIRECT, false)) { |
| *bdrv_flags |= BDRV_O_NOCACHE; |
| } |
| if (qemu_opt_get_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, false)) { |
| *bdrv_flags |= BDRV_O_NO_FLUSH; |
| } |
| |
| 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) { |
| memset(throttle_cfg, 0, sizeof(*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->op_size = |
| qemu_opt_get_number(opts, "throttling.iops-size", 0); |
| |
| if (!check_throttle_config(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; |
| 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; |
| bool has_driver_specific_opts; |
| 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"); |
| } |
| |
| has_driver_specific_opts = !!qdict_size(bs_opts); |
| |
| /* 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); |
| |
| 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) { |
| /* always use cache=unsafe with snapshot */ |
| bdrv_flags &= ~BDRV_O_CACHE_MASK; |
| bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); |
| } |
| |
| /* init */ |
| if ((!file || !*file) && !has_driver_specific_opts) { |
| BlockBackendRootState *blk_rs; |
| |
| blk = blk_new(qemu_opts_id(opts), 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; |
| } |
| |
| blk = blk_new_open(qemu_opts_id(opts), 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_on_error(blk, on_read_error, on_write_error); |
| |
| 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; |
| } |
| |
| 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; |
| } |
| |
| 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; |
| |
| if (bdrv_parse_cache_flags(value, &flags) != 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, |
| !!(flags & BDRV_O_CACHE_WB), &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 = bdrv_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(TransactionActionKind type, void *data, |
| Error **errp) |
| { |
| TransactionAction action; |
| TransactionActionList list; |
| |
| action.type = type; |
| action.u.data = data; |
| 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, |
| }; |
| blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, |
| &snapshot, errp); |
| } |
| |
| void qmp_blockdev_snapshot(const char *node, const char *overlay, |
| Error **errp) |
| { |
| BlockdevSnapshot snapshot_data = { |
| .node = (char *) node, |
| .overlay = (char *) overlay |
| }; |
| |
| blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT, |
| &snapshot_data, errp); |
| } |
| |
| void qmp_blockdev_snapshot_internal_sync(const char *device, |
| const char *name, |
| Error **errp) |
| { |
| BlockdevSnapshotInternal snapshot = { |
| .device = (char *) device, |
| .name = (char *) name |
| }; |
| |
| blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, |
| &snapshot, 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; |
| 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_report("Failed to delete snapshot with id '%s' and name '%s' on " |
| "device '%s' in abort: %s", |
| sn->id_str, |
| sn->name, |
| bdrv_get_device_name(bs), |
| error_get_pretty(local_error)); |
| error_free(local_error); |
| } |
| } |
| |
| 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; |
| 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; |
| 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; |
| 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; |
| |
| /* create new image w/backing file */ |
| mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
| if (mode != NEW_IMAGE_MODE_EXISTING) { |
| bdrv_img_create(new_image_file, format, |
| state->old_bs->filename, |
| state->old_bs->drv->format_name, |
| NULL, -1, flags, &local_err, false); |
| if (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 */ |
| 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; |
| |
| 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; |
| |
| 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; |
| /* 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; |
| /* 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; |
| 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_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_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_is_tray_open(blk)) { |
| return; |
| } |
| |
| blk_dev_change_media_cb(blk, true); |
| } |
| |
| void qmp_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_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; |
| } |
| |
| /* This follows the convention established by bdrv_make_anon() */ |
| if (bs->device_list.tqe_prev) { |
| QTAILQ_REMOVE(&bdrv_states, bs, device_list); |
| bs->device_list.tqe_prev = NULL; |
| } |
| |
| blk_remove_bs(blk); |
| |
| 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_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); |
| |
| QTAILQ_INSERT_TAIL(&bdrv_states, bs, device_list); |
| } |
| |
| void qmp_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); |
| |
| 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_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_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; |
| } |
| |
| memset(&cfg, 0, sizeof(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_iops_size) { |
| cfg.op_size = iops_size; |
| } |
| |
| if (!check_throttle_config(&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; |
| |
| 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; |
| } |
| |
| bdrv_close(bs); |
| } |
| |
| /* if we have a device attached to this BlockDriverState |
| * then we need to make the drive anonymous until the device |
| * can be removed. If this is a drive with no device backing |
| * then we can just get rid of the block driver state right here. |
| */ |
| if (blk_get_attached_dev(blk)) { |
| blk_hide_on_behalf_of_hmp_drive_del(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); |
| } |
| |
| 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) |
| { |
| BlockBackend *blk; |
| BlockDriverState *bs; |
| BlockDriverState *source, *target_bs; |
| AioContext *aio_context; |
| Error *local_err = NULL; |
| QDict *options; |
| 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; |
| } |
| 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; |
| } |
| |
| 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_format) { |
| format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; |
| } |
| |
| if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR, errp)) { |
| goto out; |
| } |
| |
| 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); |
| |
| /* 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_bs, |
| has_replaces ? replaces : NULL, |
| speed, granularity, buf_size, sync, |
| on_source_error, on_target_error, |
| unmap, |
| block_job_cb, bs, &local_err); |
| if (local_err != NULL) { |
| bdrv_unref(target_bs); |
| error_propagate(errp, local_err); |
| goto out; |
| } |
| |
| out: |
| 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 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), |
| &options, NULL, &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; |
| } |
| } |
| |
| if (bs && bdrv_key_required(bs)) { |
| if (blk) { |
| blk_unref(blk); |
| } else { |
| 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 = blk_by_name(id); |
| if (!blk) { |
| error_setg(errp, "Cannot find block backend %s", id); |
| 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 (bs->refcnt > 1 || !QLIST_EMPTY(&bs->parents)) { |
| error_setg(errp, "Block device %s is in use", |
| bdrv_get_device_or_node_name(bs)); |
| goto out; |
| } |
| } |
| |
| if (blk) { |
| blk_unref(blk); |
| } else { |
| 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 = BDRV_OPT_CACHE_WB, |
| .type = QEMU_OPT_BOOL, |
| .help = "enables writeback mode for any caches", |
| },{ |
| .name = BDRV_OPT_CACHE_DIRECT, |
| .type = QEMU_OPT_BOOL, |
| .help = "enables use of O_DIRECT (bypass the host page cache)", |
| },{ |
| .name = BDRV_OPT_CACHE_NO_FLUSH, |
| .type = QEMU_OPT_BOOL, |
| .help = "ignore any flush requests for the device", |
| },{ |
| .name = "aio", |
| .type = QEMU_OPT_STRING, |
| .help = "host AIO implementation (threads, native)", |
| },{ |
| .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-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_common_drive_opts.head), |
| .desc = { |
| { |
| .name = "discard", |
| .type = QEMU_OPT_STRING, |
| .help = "discard operation (ignore/off, unmap/on)", |
| },{ |
| .name = "cache.writeback", |
| .type = QEMU_OPT_BOOL, |
| .help = "enables writeback mode for any caches", |
| },{ |
| .name = "cache.direct", |
| .type = QEMU_OPT_BOOL, |
| .help = "enables use of O_DIRECT (bypass the host page cache)", |
| },{ |
| .name = "cache.no-flush", |
| .type = QEMU_OPT_BOOL, |
| .help = "ignore any flush requests for the device", |
| },{ |
| .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 */ } |
| }, |
| }; |