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-rw-r--r--block.c181
-rw-r--r--block/backup.c34
-rw-r--r--block/blkverify.c19
-rw-r--r--block/block-backend.c251
-rw-r--r--block/commit.c7
-rw-r--r--block/io.c293
-rw-r--r--block/mirror.c38
-rw-r--r--block/qapi.c6
-rw-r--r--block/qcow2.c3
-rw-r--r--block/quorum.c24
-rw-r--r--block/snapshot.c30
-rw-r--r--block/stream.c10
-rw-r--r--block/throttle-groups.c244
-rw-r--r--block/vmdk.c23
-rw-r--r--blockdev.c120
-rw-r--r--blockjob.c6
-rw-r--r--include/block/block.h14
-rw-r--r--include/block/block_int.h47
-rw-r--r--include/block/blockjob.h4
-rw-r--r--include/block/throttle-groups.h14
-rw-r--r--include/sysemu/block-backend.h30
-rw-r--r--migration/block.c4
-rw-r--r--monitor.c6
-rw-r--r--qemu-io-cmds.c226
-rw-r--r--qmp.c5
-rw-r--r--tests/qemu-iotests/0963
-rwxr-xr-xtests/qemu-iotests/100152
-rw-r--r--tests/qemu-iotests/100.out103
-rwxr-xr-xtests/qemu-iotests/1092
-rw-r--r--tests/qemu-iotests/109.out4
-rw-r--r--tests/qemu-iotests/13635
-rw-r--r--tests/qemu-iotests/136.out4
-rwxr-xr-xtests/qemu-iotests/154265
-rw-r--r--tests/qemu-iotests/154.out242
-rw-r--r--tests/qemu-iotests/group3
-rw-r--r--tests/test-throttle.c62
-rw-r--r--trace-events2
37 files changed, 1155 insertions, 1361 deletions
diff --git a/block.c b/block.c
index 18a497f69d..1205ef8860 100644
--- a/block.c
+++ b/block.c
@@ -38,7 +38,6 @@
#include "qmp-commands.h"
#include "qemu/timer.h"
#include "qapi-event.h"
-#include "block/throttle-groups.h"
#include "qemu/cutils.h"
#include "qemu/id.h"
@@ -237,8 +236,6 @@ BlockDriverState *bdrv_new(void)
QLIST_INIT(&bs->op_blockers[i]);
}
notifier_with_return_list_init(&bs->before_write_notifiers);
- qemu_co_queue_init(&bs->throttled_reqs[0]);
- qemu_co_queue_init(&bs->throttled_reqs[1]);
bs->refcnt = 1;
bs->aio_context = qemu_get_aio_context();
@@ -1217,6 +1214,27 @@ void bdrv_unref_child(BlockDriverState *parent, BdrvChild *child)
bdrv_root_unref_child(child);
}
+
+static void bdrv_parent_cb_change_media(BlockDriverState *bs, bool load)
+{
+ BdrvChild *c;
+ QLIST_FOREACH(c, &bs->parents, next_parent) {
+ if (c->role->change_media) {
+ c->role->change_media(c, load);
+ }
+ }
+}
+
+static void bdrv_parent_cb_resize(BlockDriverState *bs)
+{
+ BdrvChild *c;
+ QLIST_FOREACH(c, &bs->parents, next_parent) {
+ if (c->role->resize) {
+ c->role->resize(c);
+ }
+ }
+}
+
/*
* Sets the backing file link of a BDS. A new reference is created; callers
* which don't need their own reference any more must call bdrv_unref().
@@ -1525,12 +1543,6 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
return -ENODEV;
}
- if (bs->throttle_state) {
- error_setg(errp, "Cannot reference an existing block device for "
- "which I/O throttling is enabled");
- return -EINVAL;
- }
-
bdrv_ref(bs);
*pbs = bs;
return 0;
@@ -1682,9 +1694,7 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
}
if (!bdrv_key_required(bs)) {
- if (bs->blk) {
- blk_dev_change_media_cb(bs->blk, true);
- }
+ bdrv_parent_cb_change_media(bs, true);
} else if (!runstate_check(RUN_STATE_PRELAUNCH)
&& !runstate_check(RUN_STATE_INMIGRATE)
&& !runstate_check(RUN_STATE_PAUSED)) { /* HACK */
@@ -2123,11 +2133,6 @@ static void bdrv_close(BlockDriverState *bs)
assert(!bs->job);
- /* Disable I/O limits and drain all pending throttled requests */
- if (bs->throttle_state) {
- bdrv_io_limits_disable(bs);
- }
-
bdrv_drained_begin(bs); /* complete I/O */
bdrv_flush(bs);
bdrv_drain(bs); /* in case flush left pending I/O */
@@ -2135,9 +2140,7 @@ static void bdrv_close(BlockDriverState *bs)
bdrv_release_named_dirty_bitmaps(bs);
assert(QLIST_EMPTY(&bs->dirty_bitmaps));
- if (bs->blk) {
- blk_dev_change_media_cb(bs->blk, false);
- }
+ bdrv_parent_cb_change_media(bs, false);
if (bs->drv) {
BdrvChild *child, *next;
@@ -2218,26 +2221,11 @@ void bdrv_close_all(void)
}
}
-/* Fields that need to stay with the top-level BDS */
-static void bdrv_move_feature_fields(BlockDriverState *bs_dest,
- BlockDriverState *bs_src)
-{
- /* move some fields that need to stay attached to the device */
-}
-
static void change_parent_backing_link(BlockDriverState *from,
BlockDriverState *to)
{
BdrvChild *c, *next;
- if (from->blk) {
- /* FIXME We bypass blk_set_bs(), so we need to make these updates
- * manually. The root problem is not in this change function, but the
- * existence of BlockDriverState.blk. */
- to->blk = from->blk;
- from->blk = NULL;
- }
-
QLIST_FOREACH_SAFE(c, &from->parents, next_parent, next) {
assert(c->role != &child_backing);
c->bs = to;
@@ -2248,22 +2236,6 @@ static void change_parent_backing_link(BlockDriverState *from,
}
}
-static void swap_feature_fields(BlockDriverState *bs_top,
- BlockDriverState *bs_new)
-{
- BlockDriverState tmp;
-
- bdrv_move_feature_fields(&tmp, bs_top);
- bdrv_move_feature_fields(bs_top, bs_new);
- bdrv_move_feature_fields(bs_new, &tmp);
-
- assert(!bs_new->throttle_state);
- if (bs_top->throttle_state) {
- bdrv_io_limits_enable(bs_new, throttle_group_get_name(bs_top));
- bdrv_io_limits_disable(bs_top);
- }
-}
-
/*
* Add new bs contents at the top of an image chain while the chain is
* live, while keeping required fields on the top layer.
@@ -2286,11 +2258,8 @@ void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top)
assert(!bdrv_requests_pending(bs_new));
bdrv_ref(bs_top);
- change_parent_backing_link(bs_top, bs_new);
-
- /* Some fields always stay on top of the backing file chain */
- swap_feature_fields(bs_top, bs_new);
+ change_parent_backing_link(bs_top, bs_new);
bdrv_set_backing_hd(bs_new, bs_top);
bdrv_unref(bs_top);
@@ -2306,16 +2275,6 @@ void bdrv_replace_in_backing_chain(BlockDriverState *old, BlockDriverState *new)
bdrv_ref(old);
- if (old->blk) {
- /* As long as these fields aren't in BlockBackend, but in the top-level
- * BlockDriverState, it's not possible for a BDS to have two BBs.
- *
- * We really want to copy the fields from old to new, but we go for a
- * swap instead so that pointers aren't duplicated and cause trouble.
- * (Also, bdrv_swap() used to do the same.) */
- assert(!new->blk);
- swap_feature_fields(old, new);
- }
change_parent_backing_link(old, new);
/* Change backing files if a previously independent node is added to the
@@ -2624,9 +2583,7 @@ int bdrv_truncate(BlockDriverState *bs, int64_t offset)
if (ret == 0) {
ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS);
bdrv_dirty_bitmap_truncate(bs);
- if (bs->blk) {
- blk_dev_resize_cb(bs->blk);
- }
+ bdrv_parent_cb_resize(bs);
}
return ret;
}
@@ -2736,11 +2693,9 @@ int bdrv_set_key(BlockDriverState *bs, const char *key)
if (ret < 0) {
bs->valid_key = 0;
} else if (!bs->valid_key) {
+ /* call the change callback now, we skipped it on open */
bs->valid_key = 1;
- if (bs->blk) {
- /* call the change callback now, we skipped it on open */
- blk_dev_change_media_cb(bs->blk, true);
- }
+ bdrv_parent_cb_change_media(bs, true);
}
return ret;
}
@@ -2907,34 +2862,33 @@ BlockDriverState *bdrv_next_node(BlockDriverState *bs)
return QTAILQ_NEXT(bs, node_list);
}
-/* Iterates over all top-level BlockDriverStates, i.e. BDSs that are owned by
- * the monitor or attached to a BlockBackend */
-BlockDriverState *bdrv_next(BlockDriverState *bs)
+const char *bdrv_get_node_name(const BlockDriverState *bs)
{
- if (!bs || bs->blk) {
- bs = blk_next_root_bs(bs);
- if (bs) {
- return bs;
- }
- }
-
- /* Ignore all BDSs that are attached to a BlockBackend here; they have been
- * handled by the above block already */
- do {
- bs = bdrv_next_monitor_owned(bs);
- } while (bs && bs->blk);
- return bs;
+ return bs->node_name;
}
-const char *bdrv_get_node_name(const BlockDriverState *bs)
+const char *bdrv_get_parent_name(const BlockDriverState *bs)
{
- return bs->node_name;
+ BdrvChild *c;
+ const char *name;
+
+ /* If multiple parents have a name, just pick the first one. */
+ QLIST_FOREACH(c, &bs->parents, next_parent) {
+ if (c->role->get_name) {
+ name = c->role->get_name(c);
+ if (name && *name) {
+ return name;
+ }
+ }
+ }
+
+ return NULL;
}
/* TODO check what callers really want: bs->node_name or blk_name() */
const char *bdrv_get_device_name(const BlockDriverState *bs)
{
- return bs->blk ? blk_name(bs->blk) : "";
+ return bdrv_get_parent_name(bs) ?: "";
}
/* This can be used to identify nodes that might not have a device
@@ -2943,7 +2897,7 @@ const char *bdrv_get_device_name(const BlockDriverState *bs)
* absent, then this returns an empty (non-null) string. */
const char *bdrv_get_device_or_node_name(const BlockDriverState *bs)
{
- return bs->blk ? blk_name(bs->blk) : bs->node_name;
+ return bdrv_get_parent_name(bs) ?: bs->node_name;
}
int bdrv_get_flags(BlockDriverState *bs)
@@ -3239,10 +3193,11 @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp)
void bdrv_invalidate_cache_all(Error **errp)
{
- BlockDriverState *bs = NULL;
+ BlockDriverState *bs;
Error *local_err = NULL;
+ BdrvNextIterator *it = NULL;
- while ((bs = bdrv_next(bs)) != NULL) {
+ while ((it = bdrv_next(it, &bs)) != NULL) {
AioContext *aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
@@ -3284,10 +3239,11 @@ static int bdrv_inactivate_recurse(BlockDriverState *bs,
int bdrv_inactivate_all(void)
{
BlockDriverState *bs = NULL;
+ BdrvNextIterator *it = NULL;
int ret = 0;
int pass;
- while ((bs = bdrv_next(bs)) != NULL) {
+ while ((it = bdrv_next(it, &bs)) != NULL) {
aio_context_acquire(bdrv_get_aio_context(bs));
}
@@ -3296,8 +3252,8 @@ int bdrv_inactivate_all(void)
* the second pass sets the BDRV_O_INACTIVE flag so that no further write
* is allowed. */
for (pass = 0; pass < 2; pass++) {
- bs = NULL;
- while ((bs = bdrv_next(bs)) != NULL) {
+ it = NULL;
+ while ((it = bdrv_next(it, &bs)) != NULL) {
ret = bdrv_inactivate_recurse(bs, pass);
if (ret < 0) {
goto out;
@@ -3306,8 +3262,8 @@ int bdrv_inactivate_all(void)
}
out:
- bs = NULL;
- while ((bs = bdrv_next(bs)) != NULL) {
+ it = NULL;
+ while ((it = bdrv_next(it, &bs)) != NULL) {
aio_context_release(bdrv_get_aio_context(bs));
}
@@ -3653,6 +3609,7 @@ AioContext *bdrv_get_aio_context(BlockDriverState *bs)
void bdrv_detach_aio_context(BlockDriverState *bs)
{
BdrvAioNotifier *baf;
+ BdrvChild *child;
if (!bs->drv) {
return;
@@ -3662,17 +3619,11 @@ void bdrv_detach_aio_context(BlockDriverState *bs)
baf->detach_aio_context(baf->opaque);
}
- if (bs->throttle_state) {
- throttle_timers_detach_aio_context(&bs->throttle_timers);
- }
if (bs->drv->bdrv_detach_aio_context) {
bs->drv->bdrv_detach_aio_context(bs);
}
- if (bs->file) {
- bdrv_detach_aio_context(bs->file->bs);
- }
- if (bs->backing) {
- bdrv_detach_aio_context(bs->backing->bs);
+ QLIST_FOREACH(child, &bs->children, next) {
+ bdrv_detach_aio_context(child->bs);
}
bs->aio_context = NULL;
@@ -3682,6 +3633,7 @@ void bdrv_attach_aio_context(BlockDriverState *bs,
AioContext *new_context)
{
BdrvAioNotifier *ban;
+ BdrvChild *child;
if (!bs->drv) {
return;
@@ -3689,18 +3641,12 @@ void bdrv_attach_aio_context(BlockDriverState *bs,
bs->aio_context = new_context;
- if (bs->backing) {
- bdrv_attach_aio_context(bs->backing->bs, new_context);
- }
- if (bs->file) {
- bdrv_attach_aio_context(bs->file->bs, new_context);
+ QLIST_FOREACH(child, &bs->children, next) {
+ bdrv_attach_aio_context(child->bs, new_context);
}
if (bs->drv->bdrv_attach_aio_context) {
bs->drv->bdrv_attach_aio_context(bs, new_context);
}
- if (bs->throttle_state) {
- throttle_timers_attach_aio_context(&bs->throttle_timers, new_context);
- }
QLIST_FOREACH(ban, &bs->aio_notifiers, list) {
ban->attached_aio_context(new_context, ban->opaque);
@@ -3806,10 +3752,11 @@ bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs,
*/
bool bdrv_is_first_non_filter(BlockDriverState *candidate)
{
- BlockDriverState *bs = NULL;
+ BlockDriverState *bs;
+ BdrvNextIterator *it = NULL;
/* walk down the bs forest recursively */
- while ((bs = bdrv_next(bs)) != NULL) {
+ while ((it = bdrv_next(it, &bs)) != NULL) {
bool perm;
/* try to recurse in this top level bs */
diff --git a/block/backup.c b/block/backup.c
index 491fd14068..fec45e8212 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -218,15 +218,6 @@ static void backup_set_speed(BlockJob *job, int64_t speed, Error **errp)
ratelimit_set_speed(&s->limit, speed / BDRV_SECTOR_SIZE, SLICE_TIME);
}
-static void backup_iostatus_reset(BlockJob *job)
-{
- BackupBlockJob *s = container_of(job, BackupBlockJob, common);
-
- if (s->target->blk) {
- blk_iostatus_reset(s->target->blk);
- }
-}
-
static void backup_cleanup_sync_bitmap(BackupBlockJob *job, int ret)
{
BdrvDirtyBitmap *bm;
@@ -263,7 +254,6 @@ static const BlockJobDriver backup_job_driver = {
.instance_size = sizeof(BackupBlockJob),
.job_type = BLOCK_JOB_TYPE_BACKUP,
.set_speed = backup_set_speed,
- .iostatus_reset = backup_iostatus_reset,
.commit = backup_commit,
.abort = backup_abort,
};
@@ -272,11 +262,11 @@ static BlockErrorAction backup_error_action(BackupBlockJob *job,
bool read, int error)
{
if (read) {
- return block_job_error_action(&job->common, job->common.bs,
- job->on_source_error, true, error);
+ return block_job_error_action(&job->common, job->on_source_error,
+ true, error);
} else {
- return block_job_error_action(&job->common, job->target,
- job->on_target_error, false, error);
+ return block_job_error_action(&job->common, job->on_target_error,
+ false, error);
}
}
@@ -388,7 +378,6 @@ static void coroutine_fn backup_run(void *opaque)
BackupCompleteData *data;
BlockDriverState *bs = job->common.bs;
BlockDriverState *target = job->target;
- BlockdevOnError on_target_error = job->on_target_error;
NotifierWithReturn before_write = {
.notify = backup_before_write_notify,
};
@@ -404,11 +393,6 @@ static void coroutine_fn backup_run(void *opaque)
job->done_bitmap = bitmap_new(end);
- if (target->blk) {
- blk_set_on_error(target->blk, on_target_error, on_target_error);
- blk_iostatus_enable(target->blk);
- }
-
bdrv_add_before_write_notifier(bs, &before_write);
if (job->sync_mode == MIRROR_SYNC_MODE_NONE) {
@@ -484,9 +468,6 @@ static void coroutine_fn backup_run(void *opaque)
qemu_co_rwlock_unlock(&job->flush_rwlock);
g_free(job->done_bitmap);
- if (target->blk) {
- blk_iostatus_disable(target->blk);
- }
bdrv_op_unblock_all(target, job->common.blocker);
data = g_malloc(sizeof(*data));
@@ -515,13 +496,6 @@ void backup_start(BlockDriverState *bs, BlockDriverState *target,
return;
}
- if ((on_source_error == BLOCKDEV_ON_ERROR_STOP ||
- on_source_error == BLOCKDEV_ON_ERROR_ENOSPC) &&
- (!bs->blk || !blk_iostatus_is_enabled(bs->blk))) {
- error_setg(errp, QERR_INVALID_PARAMETER, "on-source-error");
- return;
- }
-
if (!bdrv_is_inserted(bs)) {
error_setg(errp, "Device is not inserted: %s",
bdrv_get_device_name(bs));
diff --git a/block/blkverify.c b/block/blkverify.c
index 9414b7a84e..4045396a3d 100644
--- a/block/blkverify.c
+++ b/block/blkverify.c
@@ -293,22 +293,6 @@ static bool blkverify_recurse_is_first_non_filter(BlockDriverState *bs,
return bdrv_recurse_is_first_non_filter(s->test_file->bs, candidate);
}
-/* Propagate AioContext changes to ->test_file */
-static void blkverify_detach_aio_context(BlockDriverState *bs)
-{
- BDRVBlkverifyState *s = bs->opaque;
-
- bdrv_detach_aio_context(s->test_file->bs);
-}
-
-static void blkverify_attach_aio_context(BlockDriverState *bs,
- AioContext *new_context)
-{
- BDRVBlkverifyState *s = bs->opaque;
-
- bdrv_attach_aio_context(s->test_file->bs, new_context);
-}
-
static void blkverify_refresh_filename(BlockDriverState *bs, QDict *options)
{
BDRVBlkverifyState *s = bs->opaque;
@@ -356,9 +340,6 @@ static BlockDriver bdrv_blkverify = {
.bdrv_aio_writev = blkverify_aio_writev,
.bdrv_aio_flush = blkverify_aio_flush,
- .bdrv_attach_aio_context = blkverify_attach_aio_context,
- .bdrv_detach_aio_context = blkverify_detach_aio_context,
-
.is_filter = true,
.bdrv_recurse_is_first_non_filter = blkverify_recurse_is_first_non_filter,
};
diff --git a/block/block-backend.c b/block/block-backend.c
index a1e2c7fa20..6928d61de4 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -34,6 +34,7 @@ struct BlockBackend {
DriveInfo *legacy_dinfo; /* null unless created by drive_new() */
QTAILQ_ENTRY(BlockBackend) link; /* for block_backends */
QTAILQ_ENTRY(BlockBackend) monitor_link; /* for monitor_block_backends */
+ BlockBackendPublic public;
void *dev; /* attached device model, if any */
/* TODO change to DeviceState when all users are qdevified */
@@ -74,6 +75,7 @@ static const AIOCBInfo block_backend_aiocb_info = {
};
static void drive_info_del(DriveInfo *dinfo);
+static BlockBackend *bdrv_first_blk(BlockDriverState *bs);
/* All BlockBackends */
static QTAILQ_HEAD(, BlockBackend) block_backends =
@@ -90,9 +92,26 @@ static void blk_root_inherit_options(int *child_flags, QDict *child_options,
/* We're not supposed to call this function for root nodes */
abort();
}
+static void blk_root_drained_begin(BdrvChild *child);
+static void blk_root_drained_end(BdrvChild *child);
+
+static void blk_root_change_media(BdrvChild *child, bool load);
+static void blk_root_resize(BdrvChild *child);
+
+static const char *blk_root_get_name(BdrvChild *child)
+{
+ return blk_name(child->opaque);
+}
static const BdrvChildRole child_root = {
- .inherit_options = blk_root_inherit_options,
+ .inherit_options = blk_root_inherit_options,
+
+ .change_media = blk_root_change_media,
+ .resize = blk_root_resize,
+ .get_name = blk_root_get_name,
+
+ .drained_begin = blk_root_drained_begin,
+ .drained_end = blk_root_drained_end,
};
/*
@@ -106,8 +125,12 @@ BlockBackend *blk_new(Error **errp)
blk = g_new0(BlockBackend, 1);
blk->refcnt = 1;
+ qemu_co_queue_init(&blk->public.throttled_reqs[0]);
+ qemu_co_queue_init(&blk->public.throttled_reqs[1]);
+
notifier_list_init(&blk->remove_bs_notifiers);
notifier_list_init(&blk->insert_bs_notifiers);
+
QTAILQ_INSERT_TAIL(&block_backends, blk, link);
return blk;
}
@@ -128,7 +151,7 @@ BlockBackend *blk_new_with_bs(Error **errp)
bs = bdrv_new_root();
blk->root = bdrv_root_attach_child(bs, "root", &child_root);
- bs->blk = blk;
+ blk->root->opaque = blk;
return blk;
}
@@ -177,10 +200,6 @@ static void blk_delete(BlockBackend *blk)
}
assert(QLIST_EMPTY(&blk->remove_bs_notifiers.notifiers));
assert(QLIST_EMPTY(&blk->insert_bs_notifiers.notifiers));
- if (blk->root_state.throttle_state) {
- g_free(blk->root_state.throttle_group);
- throttle_group_unref(blk->root_state.throttle_state);
- }
QTAILQ_REMOVE(&block_backends, blk, link);
drive_info_del(blk->legacy_dinfo);
block_acct_cleanup(&blk->stats);
@@ -267,28 +286,50 @@ BlockBackend *blk_next(BlockBackend *blk)
: QTAILQ_FIRST(&monitor_block_backends);
}
-/*
- * Iterates over all BlockDriverStates which are attached to a BlockBackend.
- * This function is for use by bdrv_next().
- *
- * @bs must be NULL or a BDS that is attached to a BB.
- */
-BlockDriverState *blk_next_root_bs(BlockDriverState *bs)
-{
+struct BdrvNextIterator {
+ enum {
+ BDRV_NEXT_BACKEND_ROOTS,
+ BDRV_NEXT_MONITOR_OWNED,
+ } phase;
BlockBackend *blk;
+ BlockDriverState *bs;
+};
- if (bs) {
- assert(bs->blk);
- blk = bs->blk;
- } else {
- blk = NULL;
+/* Iterates over all top-level BlockDriverStates, i.e. BDSs that are owned by
+ * the monitor or attached to a BlockBackend */
+BdrvNextIterator *bdrv_next(BdrvNextIterator *it, BlockDriverState **bs)
+{
+ if (!it) {
+ it = g_new(BdrvNextIterator, 1);
+ *it = (BdrvNextIterator) {
+ .phase = BDRV_NEXT_BACKEND_ROOTS,
+ };
+ }
+
+ /* First, return all root nodes of BlockBackends. In order to avoid
+ * returning a BDS twice when multiple BBs refer to it, we only return it
+ * if the BB is the first one in the parent list of the BDS. */
+ if (it->phase == BDRV_NEXT_BACKEND_ROOTS) {
+ do {
+ it->blk = blk_all_next(it->blk);
+ *bs = it->blk ? blk_bs(it->blk) : NULL;
+ } while (it->blk && (*bs == NULL || bdrv_first_blk(*bs) != it->blk));
+
+ if (*bs) {
+ return it;
+ }
+ it->phase = BDRV_NEXT_MONITOR_OWNED;
}
+ /* Then return the monitor-owned BDSes without a BB attached. Ignore all
+ * BDSes that are attached to a BlockBackend here; they have been handled
+ * by the above block already */
do {
- blk = blk_all_next(blk);
- } while (blk && !blk->root);
+ it->bs = bdrv_next_monitor_owned(it->bs);
+ *bs = it->bs;
+ } while (*bs && bdrv_has_blk(*bs));
- return blk ? blk->root->bs : NULL;
+ return *bs ? it : NULL;
}
/*
@@ -375,6 +416,26 @@ BlockDriverState *blk_bs(BlockBackend *blk)
return blk->root ? blk->root->bs : NULL;
}
+static BlockBackend *bdrv_first_blk(BlockDriverState *bs)
+{
+ BdrvChild *child;
+ QLIST_FOREACH(child, &bs->parents, next_parent) {
+ if (child->role == &child_root) {
+ return child->opaque;
+ }
+ }
+
+ return NULL;
+}
+
+/*
+ * Returns true if @bs has an associated BlockBackend.
+ */
+bool bdrv_has_blk(BlockDriverState *bs)
+{
+ return bdrv_first_blk(bs) != NULL;
+}
+
/*
* Return @blk's DriveInfo if any, else null.
*/
@@ -411,17 +472,33 @@ BlockBackend *blk_by_legacy_dinfo(DriveInfo *dinfo)
}
/*
+ * Returns a pointer to the publicly accessible fields of @blk.
+ */
+BlockBackendPublic *blk_get_public(BlockBackend *blk)
+{
+ return &blk->public;
+}
+
+/*
+ * Returns a BlockBackend given the associated @public fields.
+ */
+BlockBackend *blk_by_public(BlockBackendPublic *public)
+{
+ return container_of(public, BlockBackend, public);
+}
+
+/*
* Disassociates the currently associated BlockDriverState from @blk.
*/
void blk_remove_bs(BlockBackend *blk)
{
- assert(blk->root->bs->blk == blk);
-
notifier_list_notify(&blk->remove_bs_notifiers, blk);
+ if (blk->public.throttle_state) {
+ throttle_timers_detach_aio_context(&blk->public.throttle_timers);
+ }
blk_update_root_state(blk);
- blk->root->bs->blk = NULL;
bdrv_root_unref_child(blk->root);
blk->root = NULL;
}
@@ -431,12 +508,15 @@ void blk_remove_bs(BlockBackend *blk)
*/
void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs)
{
- assert(!blk->root && !bs->blk);
bdrv_ref(bs);
blk->root = bdrv_root_attach_child(bs, "root", &child_root);
- bs->blk = blk;
+ blk->root->opaque = blk;
notifier_list_notify(&blk->insert_bs_notifiers, blk);
+ if (blk->public.throttle_state) {
+ throttle_timers_attach_aio_context(
+ &blk->public.throttle_timers, bdrv_get_aio_context(bs));
+ }
}
/*
@@ -525,6 +605,11 @@ void blk_dev_change_media_cb(BlockBackend *blk, bool load)
}
}
+static void blk_root_change_media(BdrvChild *child, bool load)
+{
+ blk_dev_change_media_cb(child->opaque, load);
+}
+
/*
* Does @blk's attached device model have removable media?
* %true if no device model is attached.
@@ -579,8 +664,10 @@ bool blk_dev_is_medium_locked(BlockBackend *blk)
/*
* Notify @blk's attached device model of a backend size change.
*/
-void blk_dev_resize_cb(BlockBackend *blk)
+static void blk_root_resize(BdrvChild *child)
{
+ BlockBackend *blk = child->opaque;
+
if (blk->dev_ops && blk->dev_ops->resize_cb) {
blk->dev_ops->resize_cb(blk->dev_opaque);
}
@@ -692,6 +779,11 @@ static int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
return ret;
}
+ /* throttling disk I/O */
+ if (blk->public.throttle_state) {
+ throttle_group_co_io_limits_intercept(blk, bytes, false);
+ }
+
return bdrv_co_preadv(blk_bs(blk), offset, bytes, qiov, flags);
}
@@ -706,6 +798,11 @@ static int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset,
return ret;
}
+ /* throttling disk I/O */
+ if (blk->public.throttle_state) {
+ throttle_group_co_io_limits_intercept(blk, bytes, true);
+ }
+
if (!blk->enable_write_cache) {
flags |= BDRV_REQ_FUA;
}
@@ -775,7 +872,6 @@ static int blk_prw(BlockBackend *blk, int64_t offset, uint8_t *buf,
int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,
int count)
{
- BlockDriverState *bs = blk_bs(blk);
int ret;
ret = blk_check_byte_request(blk, offset, count);
@@ -783,9 +879,9 @@ int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,
return ret;
}
- bdrv_no_throttling_begin(bs);
+ blk_root_drained_begin(blk->root);
ret = blk_pread(blk, offset, buf, count);
- bdrv_no_throttling_end(bs);
+ blk_root_drained_end(blk->root);
return ret;
}
@@ -1008,20 +1104,6 @@ void blk_aio_cancel_async(BlockAIOCB *acb)
bdrv_aio_cancel_async(acb);
}
-int blk_aio_multiwrite(BlockBackend *blk, BlockRequest *reqs, int num_reqs)
-{
- int i, ret;
-
- for (i = 0; i < num_reqs; i++) {
- ret = blk_check_request(blk, reqs[i].sector, reqs[i].nb_sectors);
- if (ret < 0) {
- return ret;
- }
- }
-
- return bdrv_aio_multiwrite(blk_bs(blk), reqs, num_reqs);
-}
-
int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf)
{
if (!blk_is_available(blk)) {
@@ -1334,7 +1416,14 @@ void blk_set_aio_context(BlockBackend *blk, AioContext *new_context)
BlockDriverState *bs = blk_bs(blk);
if (bs) {
+ if (blk->public.throttle_state) {
+ throttle_timers_detach_aio_context(&blk->public.throttle_timers);
+ }
bdrv_set_aio_context(bs, new_context);
+ if (blk->public.throttle_state) {
+ throttle_timers_attach_aio_context(&blk->public.throttle_timers,
+ new_context);
+ }
}
}
@@ -1499,19 +1588,6 @@ void blk_update_root_state(BlockBackend *blk)
blk->root_state.open_flags = blk->root->bs->open_flags;
blk->root_state.read_only = blk->root->bs->read_only;
blk->root_state.detect_zeroes = blk->root->bs->detect_zeroes;
-
- if (blk->root_state.throttle_group) {
- g_free(blk->root_state.throttle_group);
- throttle_group_unref(blk->root_state.throttle_state);
- }
- if (blk->root->bs->throttle_state) {
- const char *name = throttle_group_get_name(blk->root->bs);
- blk->root_state.throttle_group = g_strdup(name);
- blk->root_state.throttle_state = throttle_group_incref(name);
- } else {
- blk->root_state.throttle_group = NULL;
- blk->root_state.throttle_state = NULL;
- }
}
/*
@@ -1522,9 +1598,6 @@ void blk_update_root_state(BlockBackend *blk)
void blk_apply_root_state(BlockBackend *blk, BlockDriverState *bs)
{
bs->detect_zeroes = blk->root_state.detect_zeroes;
- if (blk->root_state.throttle_group) {
- bdrv_io_limits_enable(bs, blk->root_state.throttle_group);
- }
}
/*
@@ -1587,3 +1660,59 @@ int blk_flush_all(void)
return result;
}
+
+
+/* throttling disk I/O limits */
+void blk_set_io_limits(BlockBackend *blk, ThrottleConfig *cfg)
+{
+ throttle_group_config(blk, cfg);
+}
+
+void blk_io_limits_disable(BlockBackend *blk)
+{
+ assert(blk->public.throttle_state);
+ bdrv_drained_begin(blk_bs(blk));
+ throttle_group_unregister_blk(blk);
+ bdrv_drained_end(blk_bs(blk));
+}
+
+/* should be called before blk_set_io_limits if a limit is set */
+void blk_io_limits_enable(BlockBackend *blk, const char *group)
+{
+ assert(!blk->public.throttle_state);
+ throttle_group_register_blk(blk, group);
+}
+
+void blk_io_limits_update_group(BlockBackend *blk, const char *group)
+{
+ /* this BB is not part of any group */
+ if (!blk->public.throttle_state) {
+ return;
+ }
+
+ /* this BB is a part of the same group than the one we want */
+ if (!g_strcmp0(throttle_group_get_name(blk), group)) {
+ return;
+ }
+
+ /* need to change the group this bs belong to */
+ blk_io_limits_disable(blk);
+ blk_io_limits_enable(blk, group);
+}
+
+static void blk_root_drained_begin(BdrvChild *child)
+{
+ BlockBackend *blk = child->opaque;
+
+ if (blk->public.io_limits_disabled++ == 0) {
+ throttle_group_restart_blk(blk);
+ }
+}
+
+static void blk_root_drained_end(BdrvChild *child)
+{
+ BlockBackend *blk = child->opaque;
+
+ assert(blk->public.io_limits_disabled);
+ --blk->public.io_limits_disabled;
+}
diff --git a/block/commit.c b/block/commit.c
index cba0e8c1e8..f308c8c6f0 100644
--- a/block/commit.c
+++ b/block/commit.c
@@ -214,13 +214,6 @@ void commit_start(BlockDriverState *bs, BlockDriverState *base,
BlockDriverState *overlay_bs;
Error *local_err = NULL;
- if ((on_error == BLOCKDEV_ON_ERROR_STOP ||
- on_error == BLOCKDEV_ON_ERROR_ENOSPC) &&
- (!bs->blk || !blk_iostatus_is_enabled(bs->blk))) {
- error_setg(errp, "Invalid parameter combination");
- return;
- }
-
assert(top != bs);
if (top == base) {
error_setg(errp, "Invalid files for merge: top and base are the same");
diff --git a/block/io.c b/block/io.c
index cd6d71a503..60a6bd8bdb 100644
--- a/block/io.c
+++ b/block/io.c
@@ -27,7 +27,6 @@
#include "sysemu/block-backend.h"
#include "block/blockjob.h"
#include "block/block_int.h"
-#include "block/throttle-groups.h"
#include "qemu/cutils.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
@@ -46,56 +45,26 @@ static void coroutine_fn bdrv_co_do_rw(void *opaque);
static int coroutine_fn bdrv_co_do_write_zeroes(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, BdrvRequestFlags flags);
-/* throttling disk I/O limits */
-void bdrv_set_io_limits(BlockDriverState *bs,
- ThrottleConfig *cfg)
+static void bdrv_parent_drained_begin(BlockDriverState *bs)
{
- throttle_group_config(bs, cfg);
-}
+ BdrvChild *c;
-void bdrv_no_throttling_begin(BlockDriverState *bs)
-{
- if (bs->io_limits_disabled++ == 0) {
- throttle_group_restart_bs(bs);
+ QLIST_FOREACH(c, &bs->parents, next_parent) {
+ if (c->role->drained_begin) {
+ c->role->drained_begin(c);
+ }
}
}
-void bdrv_no_throttling_end(BlockDriverState *bs)
+static void bdrv_parent_drained_end(BlockDriverState *bs)
{
- assert(bs->io_limits_disabled);
- --bs->io_limits_disabled;
-}
-
-void bdrv_io_limits_disable(BlockDriverState *bs)
-{
- assert(bs->throttle_state);
- bdrv_no_throttling_begin(bs);
- throttle_group_unregister_bs(bs);
- bdrv_no_throttling_end(bs);
-}
-
-/* should be called before bdrv_set_io_limits if a limit is set */
-void bdrv_io_limits_enable(BlockDriverState *bs, const char *group)
-{
- assert(!bs->throttle_state);
- throttle_group_register_bs(bs, group);
-}
-
-void bdrv_io_limits_update_group(BlockDriverState *bs, const char *group)
-{
- /* this bs is not part of any group */
- if (!bs->throttle_state) {
- return;
- }
+ BdrvChild *c;
- /* this bs is a part of the same group than the one we want */
- if (!g_strcmp0(throttle_group_get_name(bs), group)) {
- return;
+ QLIST_FOREACH(c, &bs->parents, next_parent) {
+ if (c->role->drained_end) {
+ c->role->drained_end(c);
+ }
}
-
- /* need to change the group this bs belong to */
- bdrv_io_limits_disable(bs);
- bdrv_io_limits_enable(bs, group);
}
void bdrv_refresh_limits(BlockDriverState *bs, Error **errp)
@@ -182,12 +151,6 @@ bool bdrv_requests_pending(BlockDriverState *bs)
if (!QLIST_EMPTY(&bs->tracked_requests)) {
return true;
}
- if (!qemu_co_queue_empty(&bs->throttled_reqs[0])) {
- return true;
- }
- if (!qemu_co_queue_empty(&bs->throttled_reqs[1])) {
- return true;
- }
QLIST_FOREACH(child, &bs->children, next) {
if (bdrv_requests_pending(child->bs)) {
@@ -275,17 +238,17 @@ static void coroutine_fn bdrv_co_yield_to_drain(BlockDriverState *bs)
*/
void coroutine_fn bdrv_co_drain(BlockDriverState *bs)
{
- bdrv_no_throttling_begin(bs);
+ bdrv_parent_drained_begin(bs);
bdrv_io_unplugged_begin(bs);
bdrv_drain_recurse(bs);
bdrv_co_yield_to_drain(bs);
bdrv_io_unplugged_end(bs);
- bdrv_no_throttling_end(bs);
+ bdrv_parent_drained_end(bs);
}
void bdrv_drain(BlockDriverState *bs)
{
- bdrv_no_throttling_begin(bs);
+ bdrv_parent_drained_begin(bs);
bdrv_io_unplugged_begin(bs);
bdrv_drain_recurse(bs);
if (qemu_in_coroutine()) {
@@ -294,7 +257,7 @@ void bdrv_drain(BlockDriverState *bs)
bdrv_drain_poll(bs);
}
bdrv_io_unplugged_end(bs);
- bdrv_no_throttling_end(bs);
+ bdrv_parent_drained_end(bs);
}
/*
@@ -307,17 +270,18 @@ void bdrv_drain_all(void)
{
/* Always run first iteration so any pending completion BHs run */
bool busy = true;
- BlockDriverState *bs = NULL;
+ BlockDriverState *bs;
+ BdrvNextIterator *it = NULL;
GSList *aio_ctxs = NULL, *ctx;
- while ((bs = bdrv_next(bs))) {
+ while ((it = bdrv_next(it, &bs))) {
AioContext *aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
if (bs->job) {
block_job_pause(bs->job);
}
- bdrv_no_throttling_begin(bs);
+ bdrv_parent_drained_begin(bs);
bdrv_io_unplugged_begin(bs);
bdrv_drain_recurse(bs);
aio_context_release(aio_context);
@@ -338,10 +302,10 @@ void bdrv_drain_all(void)
for (ctx = aio_ctxs; ctx != NULL; ctx = ctx->next) {
AioContext *aio_context = ctx->data;
- bs = NULL;
+ it = NULL;
aio_context_acquire(aio_context);
- while ((bs = bdrv_next(bs))) {
+ while ((it = bdrv_next(it, &bs))) {
if (aio_context == bdrv_get_aio_context(bs)) {
if (bdrv_requests_pending(bs)) {
busy = true;
@@ -354,13 +318,13 @@ void bdrv_drain_all(void)
}
}
- bs = NULL;
- while ((bs = bdrv_next(bs))) {
+ it = NULL;
+ while ((it = bdrv_next(it, &bs))) {
AioContext *aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
bdrv_io_unplugged_end(bs);
- bdrv_no_throttling_end(bs);
+ bdrv_parent_drained_end(bs);
if (bs->job) {
block_job_resume(bs->job);
}
@@ -1069,11 +1033,6 @@ int coroutine_fn bdrv_co_preadv(BlockDriverState *bs,
flags |= BDRV_REQ_COPY_ON_READ;
}
- /* throttling disk I/O */
- if (bs->throttle_state) {
- throttle_group_co_io_limits_intercept(bs, bytes, false);
- }
-
/* Align read if necessary by padding qiov */
if (offset & (align - 1)) {
head_buf = qemu_blockalign(bs, align);
@@ -1430,11 +1389,6 @@ int coroutine_fn bdrv_co_pwritev(BlockDriverState *bs,
return ret;
}
- /* throttling disk I/O */
- if (bs->throttle_state) {
- throttle_group_co_io_limits_intercept(bs, bytes, true);
- }
-
/*
* Align write if necessary by performing a read-modify-write cycle.
* Pad qiov with the read parts and be sure to have a tracked request not
@@ -1925,200 +1879,6 @@ BlockAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs,
cb, opaque, true);
}
-
-typedef struct MultiwriteCB {
- int error;
- int num_requests;
- int num_callbacks;
- struct {
- BlockCompletionFunc *cb;
- void *opaque;
- QEMUIOVector *free_qiov;
- } callbacks[];
-} MultiwriteCB;
-
-static void multiwrite_user_cb(MultiwriteCB *mcb)
-{
- int i;
-
- for (i = 0; i < mcb->num_callbacks; i++) {
- mcb->callbacks[i].cb(mcb->callbacks[i].opaque, mcb->error);
- if (mcb->callbacks[i].free_qiov) {
- qemu_iovec_destroy(mcb->callbacks[i].free_qiov);
- }
- g_free(mcb->callbacks[i].free_qiov);
- }
-}
-
-static void multiwrite_cb(void *opaque, int ret)
-{
- MultiwriteCB *mcb = opaque;
-
- trace_multiwrite_cb(mcb, ret);
-
- if (ret < 0 && !mcb->error) {
- mcb->error = ret;
- }
-
- mcb->num_requests--;
- if (mcb->num_requests == 0) {
- multiwrite_user_cb(mcb);
- g_free(mcb);
- }
-}
-
-static int multiwrite_req_compare(const void *a, const void *b)
-{
- const BlockRequest *req1 = a, *req2 = b;
-
- /*
- * Note that we can't simply subtract req2->sector from req1->sector
- * here as that could overflow the return value.
- */
- if (req1->sector > req2->sector) {
- return 1;
- } else if (req1->sector < req2->sector) {
- return -1;
- } else {
- return 0;
- }
-}
-
-/*
- * Takes a bunch of requests and tries to merge them. Returns the number of
- * requests that remain after merging.
- */
-static int multiwrite_merge(BlockDriverState *bs, BlockRequest *reqs,
- int num_reqs, MultiwriteCB *mcb)
-{
- int i, outidx;
-
- // Sort requests by start sector
- qsort(reqs, num_reqs, sizeof(*reqs), &multiwrite_req_compare);
-
- // Check if adjacent requests touch the same clusters. If so, combine them,
- // filling up gaps with zero sectors.
- outidx = 0;
- for (i = 1; i < num_reqs; i++) {
- int merge = 0;
- int64_t oldreq_last = reqs[outidx].sector + reqs[outidx].nb_sectors;
-
- // Handle exactly sequential writes and overlapping writes.
- if (reqs[i].sector <= oldreq_last) {
- merge = 1;
- }
-
- if (reqs[outidx].qiov->niov + reqs[i].qiov->niov + 1 >
- bs->bl.max_iov) {
- merge = 0;
- }
-
- if (bs->bl.max_transfer_length && reqs[outidx].nb_sectors +
- reqs[i].nb_sectors > bs->bl.max_transfer_length) {
- merge = 0;
- }
-
- if (merge) {
- size_t size;
- QEMUIOVector *qiov = g_malloc0(sizeof(*qiov));
- qemu_iovec_init(qiov,
- reqs[outidx].qiov->niov + reqs[i].qiov->niov + 1);
-
- // Add the first request to the merged one. If the requests are
- // overlapping, drop the last sectors of the first request.
- size = (reqs[i].sector - reqs[outidx].sector) << 9;
- qemu_iovec_concat(qiov, reqs[outidx].qiov, 0, size);
-
- // We should need to add any zeros between the two requests
- assert (reqs[i].sector <= oldreq_last);
-
- // Add the second request
- qemu_iovec_concat(qiov, reqs[i].qiov, 0, reqs[i].qiov->size);
-
- // Add tail of first request, if necessary
- if (qiov->size < reqs[outidx].qiov->size) {
- qemu_iovec_concat(qiov, reqs[outidx].qiov, qiov->size,
- reqs[outidx].qiov->size - qiov->size);
- }
-
- reqs[outidx].nb_sectors = qiov->size >> 9;
- reqs[outidx].qiov = qiov;
-
- mcb->callbacks[i].free_qiov = reqs[outidx].qiov;
- } else {
- outidx++;
- reqs[outidx].sector = reqs[i].sector;
- reqs[outidx].nb_sectors = reqs[i].nb_sectors;
- reqs[outidx].qiov = reqs[i].qiov;
- }
- }
-
- if (bs->blk) {
- block_acct_merge_done(blk_get_stats(bs->blk), BLOCK_ACCT_WRITE,
- num_reqs - outidx - 1);
- }
-
- return outidx + 1;
-}
-
-/*
- * Submit multiple AIO write requests at once.
- *
- * On success, the function returns 0 and all requests in the reqs array have
- * been submitted. In error case this function returns -1, and any of the
- * requests may or may not be submitted yet. In particular, this means that the
- * callback will be called for some of the requests, for others it won't. The
- * caller must check the error field of the BlockRequest to wait for the right
- * callbacks (if error != 0, no callback will be called).
- *
- * The implementation may modify the contents of the reqs array, e.g. to merge
- * requests. However, the fields opaque and error are left unmodified as they
- * are used to signal failure for a single request to the caller.
- */
-int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, int num_reqs)
-{
- MultiwriteCB *mcb;
- int i;
-
- /* don't submit writes if we don't have a medium */
- if (bs->drv == NULL) {
- for (i = 0; i < num_reqs; i++) {
- reqs[i].error = -ENOMEDIUM;
- }
- return -1;
- }
-
- if (num_reqs == 0) {
- return 0;
- }
-
- // Create MultiwriteCB structure
- mcb = g_malloc0(sizeof(*mcb) + num_reqs * sizeof(*mcb->callbacks));
- mcb->num_requests = 0;
- mcb->num_callbacks = num_reqs;
-
- for (i = 0; i < num_reqs; i++) {
- mcb->callbacks[i].cb = reqs[i].cb;
- mcb->callbacks[i].opaque = reqs[i].opaque;
- }
-
- // Check for mergable requests
- num_reqs = multiwrite_merge(bs, reqs, num_reqs, mcb);
-
- trace_bdrv_aio_multiwrite(mcb, mcb->num_callbacks, num_reqs);
-
- /* Run the aio requests. */
- mcb->num_requests = num_reqs;
- for (i = 0; i < num_reqs; i++) {
- bdrv_co_aio_rw_vector(bs, reqs[i].sector, reqs[i].qiov,
- reqs[i].nb_sectors, reqs[i].flags,
- multiwrite_cb, mcb,
- true);
- }
-
- return 0;
-}
-
void bdrv_aio_cancel(BlockAIOCB *acb)
{
qemu_aio_ref(acb);
@@ -2789,11 +2549,14 @@ void bdrv_drained_begin(BlockDriverState *bs)
if (!bs->quiesce_counter++) {
aio_disable_external(bdrv_get_aio_context(bs));
}
+ bdrv_parent_drained_begin(bs);
bdrv_drain(bs);
}
void bdrv_drained_end(BlockDriverState *bs)
{
+ bdrv_parent_drained_end(bs);
+
assert(bs->quiesce_counter > 0);
if (--bs->quiesce_counter > 0) {
return;
diff --git a/block/mirror.c b/block/mirror.c
index 039f48125e..b9986d8218 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -80,11 +80,11 @@ static BlockErrorAction mirror_error_action(MirrorBlockJob *s, bool read,
{
s->synced = false;
if (read) {
- return block_job_error_action(&s->common, s->common.bs,
- s->on_source_error, true, error);
+ return block_job_error_action(&s->common, s->on_source_error,
+ true, error);
} else {
- return block_job_error_action(&s->common, s->target,
- s->on_target_error, false, error);
+ return block_job_error_action(&s->common, s->on_target_error,
+ false, error);
}
}
@@ -468,7 +468,7 @@ static void mirror_exit(BlockJob *job, void *opaque)
/* This was checked in mirror_start_job(), but meanwhile one of the
* nodes could have been newly attached to a BlockBackend. */
- if (to_replace->blk && s->target->blk) {
+ if (bdrv_has_blk(to_replace) && bdrv_has_blk(s->target)) {
error_report("block job: Can't create node with two BlockBackends");
data->ret = -EINVAL;
goto out;
@@ -710,9 +710,6 @@ immediate_exit:
g_free(s->cow_bitmap);
g_free(s->in_flight_bitmap);
bdrv_release_dirty_bitmap(bs, s->dirty_bitmap);
- if (s->target->blk) {
- blk_iostatus_disable(s->target->blk);
- }
data = g_malloc(sizeof(*data));
data->ret = ret;
@@ -739,15 +736,6 @@ static void mirror_set_speed(BlockJob *job, int64_t speed, Error **errp)
ratelimit_set_speed(&s->limit, speed / BDRV_SECTOR_SIZE, SLICE_TIME);
}
-static void mirror_iostatus_reset(BlockJob *job)
-{
- MirrorBlockJob *s = container_of(job, MirrorBlockJob, common);
-
- if (s->target->blk) {
- blk_iostatus_reset(s->target->blk);
- }
-}
-
static void mirror_complete(BlockJob *job, Error **errp)
{
MirrorBlockJob *s = container_of(job, MirrorBlockJob, common);
@@ -793,7 +781,6 @@ static const BlockJobDriver mirror_job_driver = {
.instance_size = sizeof(MirrorBlockJob),
.job_type = BLOCK_JOB_TYPE_MIRROR,
.set_speed = mirror_set_speed,
- .iostatus_reset= mirror_iostatus_reset,
.complete = mirror_complete,
};
@@ -801,8 +788,6 @@ static const BlockJobDriver commit_active_job_driver = {
.instance_size = sizeof(MirrorBlockJob),
.job_type = BLOCK_JOB_TYPE_COMMIT,
.set_speed = mirror_set_speed,
- .iostatus_reset
- = mirror_iostatus_reset,
.complete = mirror_complete,
};
@@ -827,13 +812,6 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target,
assert ((granularity & (granularity - 1)) == 0);
- if ((on_source_error == BLOCKDEV_ON_ERROR_STOP ||
- on_source_error == BLOCKDEV_ON_ERROR_ENOSPC) &&
- (!bs->blk || !blk_iostatus_is_enabled(bs->blk))) {
- error_setg(errp, QERR_INVALID_PARAMETER, "on-source-error");
- return;
- }
-
if (buf_size < 0) {
error_setg(errp, "Invalid parameter 'buf-size'");
return;
@@ -853,7 +831,7 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target,
} else {
replaced_bs = bs;
}
- if (replaced_bs->blk && target->blk) {
+ if (bdrv_has_blk(replaced_bs) && bdrv_has_blk(target)) {
error_setg(errp, "Can't create node with two BlockBackends");
return;
}
@@ -882,10 +860,6 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target,
bdrv_op_block_all(s->target, s->common.blocker);
- if (s->target->blk) {
- blk_set_on_error(s->target->blk, on_target_error, on_target_error);
- blk_iostatus_enable(s->target->blk);
- }
s->common.co = qemu_coroutine_create(mirror_run);
trace_mirror_start(bs, s, s->common.co, opaque);
qemu_coroutine_enter(s->common.co, s);
diff --git a/block/qapi.c b/block/qapi.c
index c5f6ba643c..5594f74d17 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -67,10 +67,10 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
info->backing_file_depth = bdrv_get_backing_file_depth(bs);
info->detect_zeroes = bs->detect_zeroes;
- if (bs->throttle_state) {
+ if (blk && blk_get_public(blk)->throttle_state) {
ThrottleConfig cfg;
- throttle_group_get_config(bs, &cfg);
+ throttle_group_get_config(blk, &cfg);
info->bps = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
info->bps_rd = cfg.buckets[THROTTLE_BPS_READ].avg;
@@ -118,7 +118,7 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
info->iops_size = cfg.op_size;
info->has_group = true;
- info->group = g_strdup(throttle_group_get_name(bs));
+ info->group = g_strdup(throttle_group_get_name(blk));
}
info->write_threshold = bdrv_write_threshold_get(bs);
diff --git a/block/qcow2.c b/block/qcow2.c
index 49d7cff17a..c9306a78c1 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2413,7 +2413,7 @@ static bool is_zero_cluster(BlockDriverState *bs, int64_t start)
BlockDriverState *file;
int64_t res = bdrv_get_block_status_above(bs, NULL, start,
s->cluster_sectors, &nr, &file);
- return res >= 0 && ((res & BDRV_BLOCK_ZERO) || !(res & BDRV_BLOCK_DATA));
+ return res >= 0 && (res & BDRV_BLOCK_ZERO) && nr == s->cluster_sectors;
}
static bool is_zero_cluster_top_locked(BlockDriverState *bs, int64_t start)
@@ -2424,6 +2424,7 @@ static bool is_zero_cluster_top_locked(BlockDriverState *bs, int64_t start)
int ret;
ret = qcow2_get_cluster_offset(bs, start << BDRV_SECTOR_BITS, &nr, &off);
+ assert(nr == s->cluster_sectors);
return ret == QCOW2_CLUSTER_UNALLOCATED || ret == QCOW2_CLUSTER_ZERO;
}
diff --git a/block/quorum.c b/block/quorum.c
index 1ec3511528..ec6f3b9059 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -989,27 +989,6 @@ static void quorum_close(BlockDriverState *bs)
g_free(s->children);
}
-static void quorum_detach_aio_context(BlockDriverState *bs)
-{
- BDRVQuorumState *s = bs->opaque;
- int i;
-
- for (i = 0; i < s->num_children; i++) {
- bdrv_detach_aio_context(s->children[i]->bs);
- }
-}
-
-static void quorum_attach_aio_context(BlockDriverState *bs,
- AioContext *new_context)
-{
- BDRVQuorumState *s = bs->opaque;
- int i;
-
- for (i = 0; i < s->num_children; i++) {
- bdrv_attach_aio_context(s->children[i]->bs, new_context);
- }
-}
-
static void quorum_add_child(BlockDriverState *bs, BlockDriverState *child_bs,
Error **errp)
{
@@ -1127,9 +1106,6 @@ static BlockDriver bdrv_quorum = {
.bdrv_aio_readv = quorum_aio_readv,
.bdrv_aio_writev = quorum_aio_writev,
- .bdrv_detach_aio_context = quorum_detach_aio_context,
- .bdrv_attach_aio_context = quorum_attach_aio_context,
-
.bdrv_add_child = quorum_add_child,
.bdrv_del_child = quorum_del_child,
diff --git a/block/snapshot.c b/block/snapshot.c
index e9d721df68..3917ec5c91 100644
--- a/block/snapshot.c
+++ b/block/snapshot.c
@@ -373,9 +373,10 @@ int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs,
bool bdrv_all_can_snapshot(BlockDriverState **first_bad_bs)
{
bool ok = true;
- BlockDriverState *bs = NULL;
+ BlockDriverState *bs;
+ BdrvNextIterator *it = NULL;
- while (ok && (bs = bdrv_next(bs))) {
+ while (ok && (it = bdrv_next(it, &bs))) {
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
@@ -393,10 +394,11 @@ int bdrv_all_delete_snapshot(const char *name, BlockDriverState **first_bad_bs,
Error **err)
{
int ret = 0;
- BlockDriverState *bs = NULL;
+ BlockDriverState *bs;
+ BdrvNextIterator *it = NULL;
QEMUSnapshotInfo sn1, *snapshot = &sn1;
- while (ret == 0 && (bs = bdrv_next(bs))) {
+ while (ret == 0 && (it = bdrv_next(it, &bs))) {
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
@@ -415,9 +417,10 @@ int bdrv_all_delete_snapshot(const char *name, BlockDriverState **first_bad_bs,
int bdrv_all_goto_snapshot(const char *name, BlockDriverState **first_bad_bs)
{
int err = 0;
- BlockDriverState *bs = NULL;
+ BlockDriverState *bs;
+ BdrvNextIterator *it = NULL;
- while (err == 0 && (bs = bdrv_next(bs))) {
+ while (err == 0 && (it = bdrv_next(it, &bs))) {
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
@@ -435,9 +438,10 @@ int bdrv_all_find_snapshot(const char *name, BlockDriverState **first_bad_bs)
{
QEMUSnapshotInfo sn;
int err = 0;
- BlockDriverState *bs = NULL;
+ BlockDriverState *bs;
+ BdrvNextIterator *it = NULL;
- while (err == 0 && (bs = bdrv_next(bs))) {
+ while (err == 0 && (it = bdrv_next(it, &bs))) {
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
@@ -457,9 +461,10 @@ int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn,
BlockDriverState **first_bad_bs)
{
int err = 0;
- BlockDriverState *bs = NULL;
+ BlockDriverState *bs;
+ BdrvNextIterator *it = NULL;
- while (err == 0 && (bs = bdrv_next(bs))) {
+ while (err == 0 && (it = bdrv_next(it, &bs))) {
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
@@ -480,9 +485,10 @@ int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn,
BlockDriverState *bdrv_all_find_vmstate_bs(void)
{
bool not_found = true;
- BlockDriverState *bs = NULL;
+ BlockDriverState *bs;
+ BdrvNextIterator *it = NULL;
- while (not_found && (bs = bdrv_next(bs))) {
+ while (not_found && (it = bdrv_next(it, &bs))) {
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
diff --git a/block/stream.c b/block/stream.c
index 332b9a183e..40aa32212e 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -163,8 +163,7 @@ wait:
}
if (ret < 0) {
BlockErrorAction action =
- block_job_error_action(&s->common, s->common.bs, s->on_error,
- true, -ret);
+ block_job_error_action(&s->common, s->on_error, true, -ret);
if (action == BLOCK_ERROR_ACTION_STOP) {
n = 0;
continue;
@@ -224,13 +223,6 @@ void stream_start(BlockDriverState *bs, BlockDriverState *base,
{
StreamBlockJob *s;
- if ((on_error == BLOCKDEV_ON_ERROR_STOP ||
- on_error == BLOCKDEV_ON_ERROR_ENOSPC) &&
- (!bs->blk || !blk_iostatus_is_enabled(bs->blk))) {
- error_setg(errp, QERR_INVALID_PARAMETER, "on-error");
- return;
- }
-
s = block_job_create(&stream_job_driver, bs, speed, cb, opaque, errp);
if (!s) {
return;
diff --git a/block/throttle-groups.c b/block/throttle-groups.c
index 9ac063a0cd..59545e287e 100644
--- a/block/throttle-groups.c
+++ b/block/throttle-groups.c
@@ -23,13 +23,14 @@
*/
#include "qemu/osdep.h"
+#include "sysemu/block-backend.h"
#include "block/throttle-groups.h"
#include "qemu/queue.h"
#include "qemu/thread.h"
#include "sysemu/qtest.h"
/* The ThrottleGroup structure (with its ThrottleState) is shared
- * among different BlockDriverState and it's independent from
+ * among different BlockBackends and it's independent from
* AioContext, so in order to use it from different threads it needs
* its own locking.
*
@@ -39,26 +40,26 @@
* The whole ThrottleGroup structure is private and invisible to
* outside users, that only use it through its ThrottleState.
*
- * In addition to the ThrottleGroup structure, BlockDriverState has
+ * In addition to the ThrottleGroup structure, BlockBackendPublic has
* fields that need to be accessed by other members of the group and
- * therefore also need to be protected by this lock. Once a BDS is
- * registered in a group those fields can be accessed by other threads
- * any time.
+ * therefore also need to be protected by this lock. Once a
+ * BlockBackend is registered in a group those fields can be accessed
+ * by other threads any time.
*
* Again, all this is handled internally and is mostly transparent to
* the outside. The 'throttle_timers' field however has an additional
* constraint because it may be temporarily invalid (see for example
* bdrv_set_aio_context()). Therefore in this file a thread will
- * access some other BDS's timers only after verifying that that BDS
- * has throttled requests in the queue.
+ * access some other BlockBackend's timers only after verifying that
+ * that BlockBackend has throttled requests in the queue.
*/
typedef struct ThrottleGroup {
char *name; /* This is constant during the lifetime of the group */
QemuMutex lock; /* This lock protects the following four fields */
ThrottleState ts;
- QLIST_HEAD(, BlockDriverState) head;
- BlockDriverState *tokens[2];
+ QLIST_HEAD(, BlockBackendPublic) head;
+ BlockBackend *tokens[2];
bool any_timer_armed[2];
/* These two are protected by the global throttle_groups_lock */
@@ -132,94 +133,95 @@ void throttle_group_unref(ThrottleState *ts)
qemu_mutex_unlock(&throttle_groups_lock);
}
-/* Get the name from a BlockDriverState's ThrottleGroup. The name (and
- * the pointer) is guaranteed to remain constant during the lifetime
- * of the group.
+/* Get the name from a BlockBackend's ThrottleGroup. The name (and the pointer)
+ * is guaranteed to remain constant during the lifetime of the group.
*
- * @bs: a BlockDriverState that is member of a throttling group
+ * @blk: a BlockBackend that is member of a throttling group
* @ret: the name of the group.
*/
-const char *throttle_group_get_name(BlockDriverState *bs)
+const char *throttle_group_get_name(BlockBackend *blk)
{
- ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
+ BlockBackendPublic *blkp = blk_get_public(blk);
+ ThrottleGroup *tg = container_of(blkp->throttle_state, ThrottleGroup, ts);
return tg->name;
}
-/* Return the next BlockDriverState in the round-robin sequence,
- * simulating a circular list.
+/* Return the next BlockBackend in the round-robin sequence, simulating a
+ * circular list.
*
* This assumes that tg->lock is held.
*
- * @bs: the current BlockDriverState
- * @ret: the next BlockDriverState in the sequence
+ * @blk: the current BlockBackend
+ * @ret: the next BlockBackend in the sequence
*/
-static BlockDriverState *throttle_group_next_bs(BlockDriverState *bs)
+static BlockBackend *throttle_group_next_blk(BlockBackend *blk)
{
- ThrottleState *ts = bs->throttle_state;
+ BlockBackendPublic *blkp = blk_get_public(blk);
+ ThrottleState *ts = blkp->throttle_state;
ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
- BlockDriverState *next = QLIST_NEXT(bs, round_robin);
+ BlockBackendPublic *next = QLIST_NEXT(blkp, round_robin);
if (!next) {
- return QLIST_FIRST(&tg->head);
+ next = QLIST_FIRST(&tg->head);
}
- return next;
+ return blk_by_public(next);
}
-/* Return the next BlockDriverState in the round-robin sequence with
- * pending I/O requests.
+/* Return the next BlockBackend in the round-robin sequence with pending I/O
+ * requests.
*
* This assumes that tg->lock is held.
*
- * @bs: the current BlockDriverState
+ * @blk: the current BlockBackend
* @is_write: the type of operation (read/write)
- * @ret: the next BlockDriverState with pending requests, or bs
- * if there is none.
+ * @ret: the next BlockBackend with pending requests, or blk if there is
+ * none.
*/
-static BlockDriverState *next_throttle_token(BlockDriverState *bs,
- bool is_write)
+static BlockBackend *next_throttle_token(BlockBackend *blk, bool is_write)
{
- ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
- BlockDriverState *token, *start;
+ BlockBackendPublic *blkp = blk_get_public(blk);
+ ThrottleGroup *tg = container_of(blkp->throttle_state, ThrottleGroup, ts);
+ BlockBackend *token, *start;
start = token = tg->tokens[is_write];
/* get next bs round in round robin style */
- token = throttle_group_next_bs(token);
- while (token != start && !token->pending_reqs[is_write]) {
- token = throttle_group_next_bs(token);
+ token = throttle_group_next_blk(token);
+ while (token != start && !blkp->pending_reqs[is_write]) {
+ token = throttle_group_next_blk(token);
}
/* If no IO are queued for scheduling on the next round robin token
* then decide the token is the current bs because chances are
* the current bs get the current request queued.
*/
- if (token == start && !token->pending_reqs[is_write]) {
- token = bs;
+ if (token == start && !blkp->pending_reqs[is_write]) {
+ token = blk;
}
return token;
}
-/* Check if the next I/O request for a BlockDriverState needs to be
- * throttled or not. If there's no timer set in this group, set one
- * and update the token accordingly.
+/* Check if the next I/O request for a BlockBackend needs to be throttled or
+ * not. If there's no timer set in this group, set one and update the token
+ * accordingly.
*
* This assumes that tg->lock is held.
*
- * @bs: the current BlockDriverState
+ * @blk: the current BlockBackend
* @is_write: the type of operation (read/write)
* @ret: whether the I/O request needs to be throttled or not
*/
-static bool throttle_group_schedule_timer(BlockDriverState *bs,
- bool is_write)
+static bool throttle_group_schedule_timer(BlockBackend *blk, bool is_write)
{
- ThrottleState *ts = bs->throttle_state;
- ThrottleTimers *tt = &bs->throttle_timers;
+ BlockBackendPublic *blkp = blk_get_public(blk);
+ ThrottleState *ts = blkp->throttle_state;
+ ThrottleTimers *tt = &blkp->throttle_timers;
ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
bool must_wait;
- if (bs->io_limits_disabled) {
+ if (blkp->io_limits_disabled) {
return false;
}
@@ -230,9 +232,9 @@ static bool throttle_group_schedule_timer(BlockDriverState *bs,
must_wait = throttle_schedule_timer(ts, tt, is_write);
- /* If a timer just got armed, set bs as the current token */
+ /* If a timer just got armed, set blk as the current token */
if (must_wait) {
- tg->tokens[is_write] = bs;
+ tg->tokens[is_write] = blk;
tg->any_timer_armed[is_write] = true;
}
@@ -243,18 +245,19 @@ static bool throttle_group_schedule_timer(BlockDriverState *bs,
*
* This assumes that tg->lock is held.
*
- * @bs: the current BlockDriverState
+ * @blk: the current BlockBackend
* @is_write: the type of operation (read/write)
*/
-static void schedule_next_request(BlockDriverState *bs, bool is_write)
+static void schedule_next_request(BlockBackend *blk, bool is_write)
{
- ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
+ BlockBackendPublic *blkp = blk_get_public(blk);
+ ThrottleGroup *tg = container_of(blkp->throttle_state, ThrottleGroup, ts);
bool must_wait;
- BlockDriverState *token;
+ BlockBackend *token;
/* Check if there's any pending request to schedule next */
- token = next_throttle_token(bs, is_write);
- if (!token->pending_reqs[is_write]) {
+ token = next_throttle_token(blk, is_write);
+ if (!blkp->pending_reqs[is_write]) {
return;
}
@@ -263,12 +266,12 @@ static void schedule_next_request(BlockDriverState *bs, bool is_write)
/* If it doesn't have to wait, queue it for immediate execution */
if (!must_wait) {
- /* Give preference to requests from the current bs */
+ /* Give preference to requests from the current blk */
if (qemu_in_coroutine() &&
- qemu_co_queue_next(&bs->throttled_reqs[is_write])) {
- token = bs;
+ qemu_co_queue_next(&blkp->throttled_reqs[is_write])) {
+ token = blk;
} else {
- ThrottleTimers *tt = &token->throttle_timers;
+ ThrottleTimers *tt = &blkp->throttle_timers;
int64_t now = qemu_clock_get_ns(tt->clock_type);
timer_mod(tt->timers[is_write], now + 1);
tg->any_timer_armed[is_write] = true;
@@ -281,48 +284,50 @@ static void schedule_next_request(BlockDriverState *bs, bool is_write)
* if necessary, and schedule the next request using a round robin
* algorithm.
*
- * @bs: the current BlockDriverState
+ * @blk: the current BlockBackend
* @bytes: the number of bytes for this I/O
* @is_write: the type of operation (read/write)
*/
-void coroutine_fn throttle_group_co_io_limits_intercept(BlockDriverState *bs,
+void coroutine_fn throttle_group_co_io_limits_intercept(BlockBackend *blk,
unsigned int bytes,
bool is_write)
{
bool must_wait;
- BlockDriverState *token;
+ BlockBackend *token;
- ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
+ BlockBackendPublic *blkp = blk_get_public(blk);
+ ThrottleGroup *tg = container_of(blkp->throttle_state, ThrottleGroup, ts);
qemu_mutex_lock(&tg->lock);
/* First we check if this I/O has to be throttled. */
- token = next_throttle_token(bs, is_write);
+ token = next_throttle_token(blk, is_write);
must_wait = throttle_group_schedule_timer(token, is_write);
/* Wait if there's a timer set or queued requests of this type */
- if (must_wait || bs->pending_reqs[is_write]) {
- bs->pending_reqs[is_write]++;
+ if (must_wait || blkp->pending_reqs[is_write]) {
+ blkp->pending_reqs[is_write]++;
qemu_mutex_unlock(&tg->lock);
- qemu_co_queue_wait(&bs->throttled_reqs[is_write]);
+ qemu_co_queue_wait(&blkp->throttled_reqs[is_write]);
qemu_mutex_lock(&tg->lock);
- bs->pending_reqs[is_write]--;
+ blkp->pending_reqs[is_write]--;
}
/* The I/O will be executed, so do the accounting */
- throttle_account(bs->throttle_state, is_write, bytes);
+ throttle_account(blkp->throttle_state, is_write, bytes);
/* Schedule the next request */
- schedule_next_request(bs, is_write);
+ schedule_next_request(blk, is_write);
qemu_mutex_unlock(&tg->lock);
}
-void throttle_group_restart_bs(BlockDriverState *bs)
+void throttle_group_restart_blk(BlockBackend *blk)
{
+ BlockBackendPublic *blkp = blk_get_public(blk);
int i;
for (i = 0; i < 2; i++) {
- while (qemu_co_enter_next(&bs->throttled_reqs[i])) {
+ while (qemu_co_enter_next(&blkp->throttled_reqs[i])) {
;
}
}
@@ -332,13 +337,14 @@ void throttle_group_restart_bs(BlockDriverState *bs)
* to throttle_config(), but guarantees atomicity within the
* throttling group.
*
- * @bs: a BlockDriverState that is member of the group
+ * @blk: a BlockBackend that is a member of the group
* @cfg: the configuration to set
*/
-void throttle_group_config(BlockDriverState *bs, ThrottleConfig *cfg)
+void throttle_group_config(BlockBackend *blk, ThrottleConfig *cfg)
{
- ThrottleTimers *tt = &bs->throttle_timers;
- ThrottleState *ts = bs->throttle_state;
+ BlockBackendPublic *blkp = blk_get_public(blk);
+ ThrottleTimers *tt = &blkp->throttle_timers;
+ ThrottleState *ts = blkp->throttle_state;
ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
qemu_mutex_lock(&tg->lock);
/* throttle_config() cancels the timers */
@@ -351,20 +357,21 @@ void throttle_group_config(BlockDriverState *bs, ThrottleConfig *cfg)
throttle_config(ts, tt, cfg);
qemu_mutex_unlock(&tg->lock);
- qemu_co_enter_next(&bs->throttled_reqs[0]);
- qemu_co_enter_next(&bs->throttled_reqs[1]);
+ qemu_co_enter_next(&blkp->throttled_reqs[0]);
+ qemu_co_enter_next(&blkp->throttled_reqs[1]);
}
/* Get the throttle configuration from a particular group. Similar to
* throttle_get_config(), but guarantees atomicity within the
* throttling group.
*
- * @bs: a BlockDriverState that is member of the group
+ * @blk: a BlockBackend that is a member of the group
* @cfg: the configuration will be written here
*/
-void throttle_group_get_config(BlockDriverState *bs, ThrottleConfig *cfg)
+void throttle_group_get_config(BlockBackend *blk, ThrottleConfig *cfg)
{
- ThrottleState *ts = bs->throttle_state;
+ BlockBackendPublic *blkp = blk_get_public(blk);
+ ThrottleState *ts = blkp->throttle_state;
ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
qemu_mutex_lock(&tg->lock);
throttle_get_config(ts, cfg);
@@ -374,12 +381,13 @@ void throttle_group_get_config(BlockDriverState *bs, ThrottleConfig *cfg)
/* ThrottleTimers callback. This wakes up a request that was waiting
* because it had been throttled.
*
- * @bs: the BlockDriverState whose request had been throttled
+ * @blk: the BlockBackend whose request had been throttled
* @is_write: the type of operation (read/write)
*/
-static void timer_cb(BlockDriverState *bs, bool is_write)
+static void timer_cb(BlockBackend *blk, bool is_write)
{
- ThrottleState *ts = bs->throttle_state;
+ BlockBackendPublic *blkp = blk_get_public(blk);
+ ThrottleState *ts = blkp->throttle_state;
ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
bool empty_queue;
@@ -389,13 +397,13 @@ static void timer_cb(BlockDriverState *bs, bool is_write)
qemu_mutex_unlock(&tg->lock);
/* Run the request that was waiting for this timer */
- empty_queue = !qemu_co_enter_next(&bs->throttled_reqs[is_write]);
+ empty_queue = !qemu_co_enter_next(&blkp->throttled_reqs[is_write]);
/* If the request queue was empty then we have to take care of
* scheduling the next one */
if (empty_queue) {
qemu_mutex_lock(&tg->lock);
- schedule_next_request(bs, is_write);
+ schedule_next_request(blk, is_write);
qemu_mutex_unlock(&tg->lock);
}
}
@@ -410,17 +418,17 @@ static void write_timer_cb(void *opaque)
timer_cb(opaque, true);
}
-/* Register a BlockDriverState in the throttling group, also
- * initializing its timers and updating its throttle_state pointer to
- * point to it. If a throttling group with that name does not exist
- * yet, it will be created.
+/* Register a BlockBackend in the throttling group, also initializing its
+ * timers and updating its throttle_state pointer to point to it. If a
+ * throttling group with that name does not exist yet, it will be created.
*
- * @bs: the BlockDriverState to insert
+ * @blk: the BlockBackend to insert
* @groupname: the name of the group
*/
-void throttle_group_register_bs(BlockDriverState *bs, const char *groupname)
+void throttle_group_register_blk(BlockBackend *blk, const char *groupname)
{
int i;
+ BlockBackendPublic *blkp = blk_get_public(blk);
ThrottleState *ts = throttle_group_incref(groupname);
ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
int clock_type = QEMU_CLOCK_REALTIME;
@@ -430,67 +438,67 @@ void throttle_group_register_bs(BlockDriverState *bs, const char *groupname)
clock_type = QEMU_CLOCK_VIRTUAL;
}
- bs->throttle_state = ts;
+ blkp->throttle_state = ts;
qemu_mutex_lock(&tg->lock);
- /* If the ThrottleGroup is new set this BlockDriverState as the token */
+ /* If the ThrottleGroup is new set this BlockBackend as the token */
for (i = 0; i < 2; i++) {
if (!tg->tokens[i]) {
- tg->tokens[i] = bs;
+ tg->tokens[i] = blk;
}
}
- QLIST_INSERT_HEAD(&tg->head, bs, round_robin);
+ QLIST_INSERT_HEAD(&tg->head, blkp, round_robin);
- throttle_timers_init(&bs->throttle_timers,
- bdrv_get_aio_context(bs),
+ throttle_timers_init(&blkp->throttle_timers,
+ blk_get_aio_context(blk),
clock_type,
read_timer_cb,
write_timer_cb,
- bs);
+ blk);
qemu_mutex_unlock(&tg->lock);
}
-/* Unregister a BlockDriverState from its group, removing it from the
- * list, destroying the timers and setting the throttle_state pointer
- * to NULL.
+/* Unregister a BlockBackend from its group, removing it from the list,
+ * destroying the timers and setting the throttle_state pointer to NULL.
*
- * The BlockDriverState must not have pending throttled requests, so
- * the caller has to drain them first.
+ * The BlockBackend must not have pending throttled requests, so the caller has
+ * to drain them first.
*
* The group will be destroyed if it's empty after this operation.
*
- * @bs: the BlockDriverState to remove
+ * @blk: the BlockBackend to remove
*/
-void throttle_group_unregister_bs(BlockDriverState *bs)
+void throttle_group_unregister_blk(BlockBackend *blk)
{
- ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
+ BlockBackendPublic *blkp = blk_get_public(blk);
+ ThrottleGroup *tg = container_of(blkp->throttle_state, ThrottleGroup, ts);
int i;
- assert(bs->pending_reqs[0] == 0 && bs->pending_reqs[1] == 0);
- assert(qemu_co_queue_empty(&bs->throttled_reqs[0]));
- assert(qemu_co_queue_empty(&bs->throttled_reqs[1]));
+ assert(blkp->pending_reqs[0] == 0 && blkp->pending_reqs[1] == 0);
+ assert(qemu_co_queue_empty(&blkp->throttled_reqs[0]));
+ assert(qemu_co_queue_empty(&blkp->throttled_reqs[1]));
qemu_mutex_lock(&tg->lock);
for (i = 0; i < 2; i++) {
- if (tg->tokens[i] == bs) {
- BlockDriverState *token = throttle_group_next_bs(bs);
- /* Take care of the case where this is the last bs in the group */
- if (token == bs) {
+ if (tg->tokens[i] == blk) {
+ BlockBackend *token = throttle_group_next_blk(blk);
+ /* Take care of the case where this is the last blk in the group */
+ if (token == blk) {
token = NULL;
}
tg->tokens[i] = token;
}
}
- /* remove the current bs from the list */
- QLIST_REMOVE(bs, round_robin);
- throttle_timers_destroy(&bs->throttle_timers);
+ /* remove the current blk from the list */
+ QLIST_REMOVE(blkp, round_robin);
+ throttle_timers_destroy(&blkp->throttle_timers);
qemu_mutex_unlock(&tg->lock);
throttle_group_unref(&tg->ts);
- bs->throttle_state = NULL;
+ blkp->throttle_state = NULL;
}
static void throttle_groups_init(void)
diff --git a/block/vmdk.c b/block/vmdk.c
index 1cb4b8529c..372e5edc15 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -2344,27 +2344,6 @@ static int vmdk_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
return 0;
}
-static void vmdk_detach_aio_context(BlockDriverState *bs)
-{
- BDRVVmdkState *s = bs->opaque;
- int i;
-
- for (i = 0; i < s->num_extents; i++) {
- bdrv_detach_aio_context(s->extents[i].file->bs);
- }
-}
-
-static void vmdk_attach_aio_context(BlockDriverState *bs,
- AioContext *new_context)
-{
- BDRVVmdkState *s = bs->opaque;
- int i;
-
- for (i = 0; i < s->num_extents; i++) {
- bdrv_attach_aio_context(s->extents[i].file->bs, new_context);
- }
-}
-
static QemuOptsList vmdk_create_opts = {
.name = "vmdk-create-opts",
.head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head),
@@ -2434,8 +2413,6 @@ static BlockDriver bdrv_vmdk = {
.bdrv_get_specific_info = vmdk_get_specific_info,
.bdrv_refresh_limits = vmdk_refresh_limits,
.bdrv_get_info = vmdk_get_info,
- .bdrv_detach_aio_context = vmdk_detach_aio_context,
- .bdrv_attach_aio_context = vmdk_attach_aio_context,
.supports_backing = true,
.create_opts = &vmdk_create_opts,
diff --git a/blockdev.c b/blockdev.c
index 1892b8ec8e..40e4e6fc6f 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -577,15 +577,6 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
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) {
@@ -611,15 +602,6 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
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;
}
@@ -633,6 +615,15 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
}
}
+ /* disk I/O throttling */
+ if (throttle_enabled(&cfg)) {
+ if (!throttling_group) {
+ throttling_group = blk_name(blk);
+ }
+ blk_io_limits_enable(blk, throttling_group);
+ blk_set_io_limits(blk, &cfg);
+ }
+
blk_set_enable_write_cache(blk, !writethrough);
blk_set_on_error(blk, on_read_error, on_write_error);
@@ -1785,9 +1776,9 @@ static void external_snapshot_prepare(BlkActionState *common,
return;
}
- if (state->new_bs->blk != NULL) {
+ if (bdrv_has_blk(state->new_bs)) {
error_setg(errp, "The snapshot is already in use by %s",
- blk_name(state->new_bs->blk));
+ bdrv_get_parent_name(state->new_bs));
return;
}
@@ -2290,16 +2281,29 @@ exit:
block_job_txn_unref(block_job_txn);
}
+static int do_open_tray(const char *device, bool force, Error **errp);
+
void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
{
Error *local_err = NULL;
+ int rc;
+
+ if (!has_force) {
+ force = false;
+ }
- qmp_blockdev_open_tray(device, has_force, force, &local_err);
+ rc = do_open_tray(device, force, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
+ if (rc == EINPROGRESS) {
+ error_setg(errp, "Device '%s' is locked and force was not specified, "
+ "wait for tray to open and try again", device);
+ return;
+ }
+
qmp_x_blockdev_remove_medium(device, errp);
}
@@ -2327,35 +2331,36 @@ void qmp_block_passwd(bool has_device, const char *device,
aio_context_release(aio_context);
}
-void qmp_blockdev_open_tray(const char *device, bool has_force, bool force,
- Error **errp)
+/**
+ * returns -errno on fatal error, +errno for non-fatal situations.
+ * errp will always be set when the return code is negative.
+ * May return +ENOSYS if the device has no tray,
+ * or +EINPROGRESS if the tray is locked and the guest has been notified.
+ */
+static int do_open_tray(const char *device, 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;
+ return -ENODEV;
}
if (!blk_dev_has_removable_media(blk)) {
error_setg(errp, "Device '%s' is not removable", device);
- return;
+ return -ENOTSUP;
}
if (!blk_dev_has_tray(blk)) {
/* Ignore this command on tray-less devices */
- return;
+ return ENOSYS;
}
if (blk_dev_is_tray_open(blk)) {
- return;
+ return 0;
}
locked = blk_dev_is_medium_locked(blk);
@@ -2366,6 +2371,21 @@ void qmp_blockdev_open_tray(const char *device, bool has_force, bool force,
if (!locked || force) {
blk_dev_change_media_cb(blk, false);
}
+
+ if (locked && !force) {
+ return EINPROGRESS;
+ }
+
+ return 0;
+}
+
+void qmp_blockdev_open_tray(const char *device, bool has_force, bool force,
+ Error **errp)
+{
+ if (!has_force) {
+ force = false;
+ }
+ do_open_tray(device, force, errp);
}
void qmp_blockdev_close_tray(const char *device, Error **errp)
@@ -2503,9 +2523,9 @@ void qmp_x_blockdev_insert_medium(const char *device, const char *node_name,
return;
}
- if (bs->blk) {
+ if (bdrv_has_blk(bs)) {
error_setg(errp, "Node '%s' is already in use by '%s'", node_name,
- blk_name(bs->blk));
+ bdrv_get_parent_name(bs));
return;
}
@@ -2570,8 +2590,6 @@ void qmp_blockdev_change_medium(const char *device, const char *filename,
goto fail;
}
- blk_apply_root_state(blk, medium_bs);
-
bdrv_add_key(medium_bs, NULL, &err);
if (err) {
error_propagate(errp, err);
@@ -2596,6 +2614,8 @@ void qmp_blockdev_change_medium(const char *device, const char *filename,
goto fail;
}
+ blk_apply_root_state(blk, medium_bs);
+
qmp_blockdev_close_tray(device, errp);
fail:
@@ -2661,13 +2681,6 @@ void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
goto out;
}
- /* The BlockBackend must be the only parent */
- assert(QLIST_FIRST(&bs->parents));
- if (QLIST_NEXT(QLIST_FIRST(&bs->parents), next_parent)) {
- error_setg(errp, "Cannot throttle device with multiple parents");
- goto out;
- }
-
throttle_config_init(&cfg);
cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
@@ -2726,16 +2739,16 @@ void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
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);
+ if (!blk_get_public(blk)->throttle_state) {
+ blk_io_limits_enable(blk, has_group ? group : device);
} else if (has_group) {
- bdrv_io_limits_update_group(bs, group);
+ blk_io_limits_update_group(blk, group);
}
/* Set the new throttling configuration */
- bdrv_set_io_limits(bs, &cfg);
- } else if (bs->throttle_state) {
+ blk_set_io_limits(blk, &cfg);
+ } else if (blk_get_public(blk)->throttle_state) {
/* If all throttling settings are set to 0, disable I/O limits */
- bdrv_io_limits_disable(bs);
+ blk_io_limits_disable(blk);
}
out:
@@ -3457,7 +3470,7 @@ static void blockdev_mirror_common(BlockDriverState *bs,
if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
return;
}
- if (target->blk) {
+ if (bdrv_has_blk(target)) {
error_setg(errp, "Cannot mirror to an attached block device");
return;
}
@@ -4046,15 +4059,15 @@ void qmp_x_blockdev_del(bool has_id, const char *id,
bs = blk_bs(blk);
aio_context = blk_get_aio_context(blk);
} else {
+ blk = NULL;
bs = bdrv_find_node(node_name);
if (!bs) {
error_setg(errp, "Cannot find node %s", node_name);
return;
}
- blk = bs->blk;
- if (blk) {
+ if (bdrv_has_blk(bs)) {
error_setg(errp, "Node %s is in use by %s",
- node_name, blk_name(blk));
+ node_name, bdrv_get_parent_name(bs));
return;
}
aio_context = bdrv_get_aio_context(bs);
@@ -4151,8 +4164,9 @@ BlockJobInfoList *qmp_query_block_jobs(Error **errp)
{
BlockJobInfoList *head = NULL, **p_next = &head;
BlockDriverState *bs;
+ BdrvNextIterator *it = NULL;
- for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
+ while ((it = bdrv_next(it, &bs))) {
AioContext *aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
diff --git a/blockjob.c b/blockjob.c
index 9fc37ca965..5b840a7df6 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -411,8 +411,7 @@ void block_job_event_ready(BlockJob *job)
job->speed, &error_abort);
}
-BlockErrorAction block_job_error_action(BlockJob *job, BlockDriverState *bs,
- BlockdevOnError on_err,
+BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err,
int is_read, int error)
{
BlockErrorAction action;
@@ -443,9 +442,6 @@ BlockErrorAction block_job_error_action(BlockJob *job, BlockDriverState *bs,
job->user_paused = true;
block_job_pause(job);
block_job_iostatus_set_err(job, error);
- if (bs->blk && bs != job->bs) {
- blk_iostatus_set_err(bs->blk, error);
- }
}
return action;
}
diff --git a/include/block/block.h b/include/block/block.h
index b210832778..a8c15e36e7 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -17,6 +17,7 @@ typedef struct BlockJob BlockJob;
typedef struct BdrvChild BdrvChild;
typedef struct BdrvChildRole BdrvChildRole;
typedef struct BlockJobTxn BlockJobTxn;
+typedef struct BdrvNextIterator BdrvNextIterator;
typedef struct BlockDriverInfo {
/* in bytes, 0 if irrelevant */
@@ -187,10 +188,6 @@ void bdrv_stats_print(Monitor *mon, const QObject *data);
void bdrv_info_stats(Monitor *mon, QObject **ret_data);
/* disk I/O throttling */
-void bdrv_io_limits_enable(BlockDriverState *bs, const char *group);
-void bdrv_io_limits_disable(BlockDriverState *bs);
-void bdrv_io_limits_update_group(BlockDriverState *bs, const char *group);
-
void bdrv_init(void);
void bdrv_init_with_whitelist(void);
bool bdrv_uses_whitelist(void);
@@ -333,7 +330,7 @@ void bdrv_aio_cancel(BlockAIOCB *acb);
void bdrv_aio_cancel_async(BlockAIOCB *acb);
typedef struct BlockRequest {
- /* Fields to be filled by multiwrite caller */
+ /* Fields to be filled by caller */
union {
struct {
int64_t sector;
@@ -349,13 +346,10 @@ typedef struct BlockRequest {
BlockCompletionFunc *cb;
void *opaque;
- /* Filled by multiwrite implementation */
+ /* Filled by block layer */
int error;
} BlockRequest;
-int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs,
- int num_reqs);
-
/* sg packet commands */
int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf);
BlockAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,
@@ -408,7 +402,7 @@ BlockDriverState *bdrv_lookup_bs(const char *device,
Error **errp);
bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base);
BlockDriverState *bdrv_next_node(BlockDriverState *bs);
-BlockDriverState *bdrv_next(BlockDriverState *bs);
+BdrvNextIterator *bdrv_next(BdrvNextIterator *it, BlockDriverState **bs);
BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs);
int bdrv_is_encrypted(BlockDriverState *bs);
int bdrv_key_required(BlockDriverState *bs);
diff --git a/include/block/block_int.h b/include/block/block_int.h
index a029c2003f..b6f4755725 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -26,7 +26,6 @@
#include "block/accounting.h"
#include "block/block.h"
-#include "block/throttle-groups.h"
#include "qemu/option.h"
#include "qemu/queue.h"
#include "qemu/coroutine.h"
@@ -365,6 +364,25 @@ typedef struct BdrvAioNotifier {
struct BdrvChildRole {
void (*inherit_options)(int *child_flags, QDict *child_options,
int parent_flags, QDict *parent_options);
+
+ void (*change_media)(BdrvChild *child, bool load);
+ void (*resize)(BdrvChild *child);
+
+ /* Returns a name that is supposedly more useful for human users than the
+ * node name for identifying the node in question (in particular, a BB
+ * name), or NULL if the parent can't provide a better name. */
+ const char* (*get_name)(BdrvChild *child);
+
+ /*
+ * If this pair of functions is implemented, the parent doesn't issue new
+ * requests after returning from .drained_begin() until .drained_end() is
+ * called.
+ *
+ * Note that this can be nested. If drained_begin() was called twice, new
+ * I/O is allowed only after drained_end() was called twice, too.
+ */
+ void (*drained_begin)(BdrvChild *child);
+ void (*drained_end)(BdrvChild *child);
};
extern const BdrvChildRole child_file;
@@ -374,6 +392,7 @@ struct BdrvChild {
BlockDriverState *bs;
char *name;
const BdrvChildRole *role;
+ void *opaque;
QLIST_ENTRY(BdrvChild) next;
QLIST_ENTRY(BdrvChild) next_parent;
};
@@ -399,8 +418,6 @@ struct BlockDriverState {
BlockDriver *drv; /* NULL means no media */
void *opaque;
- BlockBackend *blk; /* owning backend, if any */
-
AioContext *aio_context; /* event loop used for fd handlers, timers, etc */
/* long-running tasks intended to always use the same AioContext as this
* BDS may register themselves in this list to be notified of changes
@@ -424,19 +441,6 @@ struct BlockDriverState {
/* number of in-flight serialising requests */
unsigned int serialising_in_flight;
- /* I/O throttling.
- * throttle_state tells us if this BDS has I/O limits configured.
- * io_limits_disabled tells us if they are currently being enforced */
- CoQueue throttled_reqs[2];
- unsigned int io_limits_disabled;
-
- /* The following fields are protected by the ThrottleGroup lock.
- * See the ThrottleGroup documentation for details. */
- ThrottleState *throttle_state;
- ThrottleTimers throttle_timers;
- unsigned pending_reqs[2];
- QLIST_ENTRY(BlockDriverState) round_robin;
-
/* Offset after the highest byte written to */
uint64_t wr_highest_offset;
@@ -502,9 +506,6 @@ struct BlockBackendRootState {
int open_flags;
bool read_only;
BlockdevDetectZeroesOptions detect_zeroes;
-
- char *throttle_group;
- ThrottleState *throttle_state;
};
static inline BlockDriverState *backing_bs(BlockDriverState *bs)
@@ -539,9 +540,6 @@ int get_tmp_filename(char *filename, int size);
BlockDriver *bdrv_probe_all(const uint8_t *buf, int buf_size,
const char *filename);
-void bdrv_set_io_limits(BlockDriverState *bs,
- ThrottleConfig *cfg);
-
/**
* bdrv_add_before_write_notifier:
@@ -724,16 +722,13 @@ BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs,
const BdrvChildRole *child_role);
void bdrv_root_unref_child(BdrvChild *child);
-void bdrv_no_throttling_begin(BlockDriverState *bs);
-void bdrv_no_throttling_end(BlockDriverState *bs);
-
+const char *bdrv_get_parent_name(const BlockDriverState *bs);
void blk_dev_change_media_cb(BlockBackend *blk, bool load);
bool blk_dev_has_removable_media(BlockBackend *blk);
bool blk_dev_has_tray(BlockBackend *blk);
void blk_dev_eject_request(BlockBackend *blk, bool force);
bool blk_dev_is_tray_open(BlockBackend *blk);
bool blk_dev_is_medium_locked(BlockBackend *blk);
-void blk_dev_resize_cb(BlockBackend *blk);
void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors);
bool bdrv_requests_pending(BlockDriverState *bs);
diff --git a/include/block/blockjob.h b/include/block/blockjob.h
index 8bedc4936c..073a433cf8 100644
--- a/include/block/blockjob.h
+++ b/include/block/blockjob.h
@@ -383,7 +383,6 @@ void block_job_iostatus_reset(BlockJob *job);
/**
* block_job_error_action:
* @job: The job to signal an error for.
- * @bs: The block device on which to set an I/O error.
* @on_err: The error action setting.
* @is_read: Whether the operation was a read.
* @error: The error that was reported.
@@ -391,8 +390,7 @@ void block_job_iostatus_reset(BlockJob *job);
* Report an I/O error for a block job and possibly stop the VM. Return the
* action that was selected based on @on_err and @error.
*/
-BlockErrorAction block_job_error_action(BlockJob *job, BlockDriverState *bs,
- BlockdevOnError on_err,
+BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err,
int is_read, int error);
typedef void BlockJobDeferToMainLoopFn(BlockJob *job, void *opaque);
diff --git a/include/block/throttle-groups.h b/include/block/throttle-groups.h
index 395f72d444..d983d34074 100644
--- a/include/block/throttle-groups.h
+++ b/include/block/throttle-groups.h
@@ -28,19 +28,19 @@
#include "qemu/throttle.h"
#include "block/block_int.h"
-const char *throttle_group_get_name(BlockDriverState *bs);
+const char *throttle_group_get_name(BlockBackend *blk);
ThrottleState *throttle_group_incref(const char *name);
void throttle_group_unref(ThrottleState *ts);
-void throttle_group_config(BlockDriverState *bs, ThrottleConfig *cfg);
-void throttle_group_get_config(BlockDriverState *bs, ThrottleConfig *cfg);
+void throttle_group_config(BlockBackend *blk, ThrottleConfig *cfg);
+void throttle_group_get_config(BlockBackend *blk, ThrottleConfig *cfg);
-void throttle_group_register_bs(BlockDriverState *bs, const char *groupname);
-void throttle_group_unregister_bs(BlockDriverState *bs);
-void throttle_group_restart_bs(BlockDriverState *bs);
+void throttle_group_register_blk(BlockBackend *blk, const char *groupname);
+void throttle_group_unregister_blk(BlockBackend *blk);
+void throttle_group_restart_blk(BlockBackend *blk);
-void coroutine_fn throttle_group_co_io_limits_intercept(BlockDriverState *bs,
+void coroutine_fn throttle_group_co_io_limits_intercept(BlockBackend *blk,
unsigned int bytes,
bool is_write);
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index 26736ed84e..68d92b556e 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -14,6 +14,7 @@
#define BLOCK_BACKEND_H
#include "qemu/iov.h"
+#include "block/throttle-groups.h"
/*
* TODO Have to include block/block.h for a bunch of block layer
@@ -59,6 +60,24 @@ typedef struct BlockDevOps {
void (*resize_cb)(void *opaque);
} BlockDevOps;
+/* This struct is embedded in (the private) BlockBackend struct and contains
+ * fields that must be public. This is in particular for QLIST_ENTRY() and
+ * friends so that BlockBackends can be kept in lists outside block-backend.c */
+typedef struct BlockBackendPublic {
+ /* I/O throttling.
+ * throttle_state tells us if this BlockBackend has I/O limits configured.
+ * io_limits_disabled tells us if they are currently being enforced */
+ CoQueue throttled_reqs[2];
+ unsigned int io_limits_disabled;
+
+ /* The following fields are protected by the ThrottleGroup lock.
+ * See the ThrottleGroup documentation for details. */
+ ThrottleState *throttle_state;
+ ThrottleTimers throttle_timers;
+ unsigned pending_reqs[2];
+ QLIST_ENTRY(BlockBackendPublic) round_robin;
+} BlockBackendPublic;
+
BlockBackend *blk_new(Error **errp);
BlockBackend *blk_new_with_bs(Error **errp);
BlockBackend *blk_new_open(const char *filename, const char *reference,
@@ -70,13 +89,16 @@ void blk_remove_all_bs(void);
const char *blk_name(BlockBackend *blk);
BlockBackend *blk_by_name(const char *name);
BlockBackend *blk_next(BlockBackend *blk);
-BlockDriverState *blk_next_root_bs(BlockDriverState *bs);
bool monitor_add_blk(BlockBackend *blk, const char *name, Error **errp);
void monitor_remove_blk(BlockBackend *blk);
+BlockBackendPublic *blk_get_public(BlockBackend *blk);
+BlockBackend *blk_by_public(BlockBackendPublic *public);
+
BlockDriverState *blk_bs(BlockBackend *blk);
void blk_remove_bs(BlockBackend *blk);
void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs);
+bool bdrv_has_blk(BlockDriverState *bs);
void blk_set_allow_write_beyond_eof(BlockBackend *blk, bool allow);
void blk_iostatus_enable(BlockBackend *blk);
@@ -116,7 +138,6 @@ BlockAIOCB *blk_aio_discard(BlockBackend *blk,
BlockCompletionFunc *cb, void *opaque);
void blk_aio_cancel(BlockAIOCB *acb);
void blk_aio_cancel_async(BlockAIOCB *acb);
-int blk_aio_multiwrite(BlockBackend *blk, BlockRequest *reqs, int num_reqs);
int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
BlockCompletionFunc *cb, void *opaque);
@@ -190,4 +211,9 @@ BlockAIOCB *blk_abort_aio_request(BlockBackend *blk,
BlockCompletionFunc *cb,
void *opaque, int ret);
+void blk_set_io_limits(BlockBackend *blk, ThrottleConfig *cfg);
+void blk_io_limits_disable(BlockBackend *blk);
+void blk_io_limits_enable(BlockBackend *blk, const char *group);
+void blk_io_limits_update_group(BlockBackend *blk, const char *group);
+
#endif
diff --git a/migration/block.c b/migration/block.c
index 1743317288..a7a76a0fb9 100644
--- a/migration/block.c
+++ b/migration/block.c
@@ -383,6 +383,7 @@ static void init_blk_migration(QEMUFile *f)
BlockDriverState *bs;
BlkMigDevState *bmds;
int64_t sectors;
+ BdrvNextIterator *it = NULL;
block_mig_state.submitted = 0;
block_mig_state.read_done = 0;
@@ -392,7 +393,8 @@ static void init_blk_migration(QEMUFile *f)
block_mig_state.bulk_completed = 0;
block_mig_state.zero_blocks = migrate_zero_blocks();
- for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
+
+ while ((it = bdrv_next(it, &bs))) {
if (bdrv_is_read_only(bs)) {
continue;
}
diff --git a/monitor.c b/monitor.c
index 0129936fbe..6a32b9bf59 100644
--- a/monitor.c
+++ b/monitor.c
@@ -3431,11 +3431,13 @@ void host_net_remove_completion(ReadLineState *rs, int nb_args, const char *str)
static void vm_completion(ReadLineState *rs, const char *str)
{
size_t len;
- BlockDriverState *bs = NULL;
+ BlockDriverState *bs;
+ BdrvNextIterator *it = NULL;
len = strlen(str);
readline_set_completion_index(rs, len);
- while ((bs = bdrv_next(bs))) {
+
+ while ((it = bdrv_next(it, &bs))) {
SnapshotInfoList *snapshots, *snapshot;
AioContext *ctx = bdrv_get_aio_context(bs);
bool ok = false;
diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c
index 4a00bc604d..e766791ffc 100644
--- a/qemu-io-cmds.c
+++ b/qemu-io-cmds.c
@@ -574,49 +574,6 @@ static int do_aio_writev(BlockBackend *blk, QEMUIOVector *qiov,
return async_ret < 0 ? async_ret : 1;
}
-struct multiwrite_async_ret {
- int num_done;
- int error;
-};
-
-static void multiwrite_cb(void *opaque, int ret)
-{
- struct multiwrite_async_ret *async_ret = opaque;
-
- async_ret->num_done++;
- if (ret < 0) {
- async_ret->error = ret;
- }
-}
-
-static int do_aio_multiwrite(BlockBackend *blk, BlockRequest* reqs,
- int num_reqs, int *total)
-{
- int i, ret;
- struct multiwrite_async_ret async_ret = {
- .num_done = 0,
- .error = 0,
- };
-
- *total = 0;
- for (i = 0; i < num_reqs; i++) {
- reqs[i].cb = multiwrite_cb;
- reqs[i].opaque = &async_ret;
- *total += reqs[i].qiov->size;
- }
-
- ret = blk_aio_multiwrite(blk, reqs, num_reqs);
- if (ret < 0) {
- return ret;
- }
-
- while (async_ret.num_done < num_reqs) {
- main_loop_wait(false);
- }
-
- return async_ret.error < 0 ? async_ret.error : 1;
-}
-
static void read_help(void)
{
printf(
@@ -1150,7 +1107,7 @@ static int writev_f(BlockBackend *blk, int argc, char **argv)
int pattern = 0xcd;
QEMUIOVector qiov;
- while ((c = getopt(argc, argv, "CqP:")) != -1) {
+ while ((c = getopt(argc, argv, "CfqP:")) != -1) {
switch (c) {
case 'C':
Cflag = true;
@@ -1211,165 +1168,6 @@ out:
return 0;
}
-static void multiwrite_help(void)
-{
- printf(
-"\n"
-" writes a range of bytes from the given offset source from multiple buffers,\n"
-" in a batch of requests that may be merged by qemu\n"
-"\n"
-" Example:\n"
-" 'multiwrite 512 1k 1k ; 4k 1k'\n"
-" writes 2 kB at 512 bytes and 1 kB at 4 kB into the open file\n"
-"\n"
-" Writes into a segment of the currently open file, using a buffer\n"
-" filled with a set pattern (0xcdcdcdcd). The pattern byte is increased\n"
-" by one for each request contained in the multiwrite command.\n"
-" -P, -- use different pattern to fill file\n"
-" -C, -- report statistics in a machine parsable format\n"
-" -q, -- quiet mode, do not show I/O statistics\n"
-"\n");
-}
-
-static int multiwrite_f(BlockBackend *blk, int argc, char **argv);
-
-static const cmdinfo_t multiwrite_cmd = {
- .name = "multiwrite",
- .cfunc = multiwrite_f,
- .argmin = 2,
- .argmax = -1,
- .args = "[-Cq] [-P pattern ] off len [len..] [; off len [len..]..]",
- .oneline = "issues multiple write requests at once",
- .help = multiwrite_help,
-};
-
-static int multiwrite_f(BlockBackend *blk, int argc, char **argv)
-{
- struct timeval t1, t2;
- bool Cflag = false, qflag = false;
- int c, cnt;
- char **buf;
- int64_t offset, first_offset = 0;
- /* Some compilers get confused and warn if this is not initialized. */
- int total = 0;
- int nr_iov;
- int nr_reqs;
- int pattern = 0xcd;
- QEMUIOVector *qiovs;
- int i;
- BlockRequest *reqs;
-
- while ((c = getopt(argc, argv, "CqP:")) != -1) {
- switch (c) {
- case 'C':
- Cflag = true;
- break;
- case 'q':
- qflag = true;
- break;
- case 'P':
- pattern = parse_pattern(optarg);
- if (pattern < 0) {
- return 0;
- }
- break;
- default:
- return qemuio_command_usage(&writev_cmd);
- }
- }
-
- if (optind > argc - 2) {
- return qemuio_command_usage(&writev_cmd);
- }
-
- nr_reqs = 1;
- for (i = optind; i < argc; i++) {
- if (!strcmp(argv[i], ";")) {
- nr_reqs++;
- }
- }
-
- reqs = g_new0(BlockRequest, nr_reqs);
- buf = g_new0(char *, nr_reqs);
- qiovs = g_new(QEMUIOVector, nr_reqs);
-
- for (i = 0; i < nr_reqs && optind < argc; i++) {
- int j;
-
- /* Read the offset of the request */
- offset = cvtnum(argv[optind]);
- if (offset < 0) {
- print_cvtnum_err(offset, argv[optind]);
- goto out;
- }
- optind++;
-
- if (offset & 0x1ff) {
- printf("offset %lld is not sector aligned\n",
- (long long)offset);
- goto out;
- }
-
- if (i == 0) {
- first_offset = offset;
- }
-
- /* Read lengths for qiov entries */
- for (j = optind; j < argc; j++) {
- if (!strcmp(argv[j], ";")) {
- break;
- }
- }
-
- nr_iov = j - optind;
-
- /* Build request */
- buf[i] = create_iovec(blk, &qiovs[i], &argv[optind], nr_iov, pattern);
- if (buf[i] == NULL) {
- goto out;
- }
-
- reqs[i].qiov = &qiovs[i];
- reqs[i].sector = offset >> 9;
- reqs[i].nb_sectors = reqs[i].qiov->size >> 9;
-
- optind = j + 1;
-
- pattern++;
- }
-
- /* If there were empty requests at the end, ignore them */
- nr_reqs = i;
-
- gettimeofday(&t1, NULL);
- cnt = do_aio_multiwrite(blk, reqs, nr_reqs, &total);
- gettimeofday(&t2, NULL);
-
- if (cnt < 0) {
- printf("aio_multiwrite failed: %s\n", strerror(-cnt));
- goto out;
- }
-
- if (qflag) {
- goto out;
- }
-
- /* Finally, report back -- -C gives a parsable format */
- t2 = tsub(t2, t1);
- print_report("wrote", &t2, first_offset, total, total, cnt, Cflag);
-out:
- for (i = 0; i < nr_reqs; i++) {
- qemu_io_free(buf[i]);
- if (reqs[i].qiov != NULL) {
- qemu_iovec_destroy(&qiovs[i]);
- }
- }
- g_free(buf);
- g_free(reqs);
- g_free(qiovs);
- return 0;
-}
-
struct aio_ctx {
BlockBackend *blk;
QEMUIOVector qiov;
@@ -1476,6 +1274,7 @@ static void aio_read_help(void)
" used to ensure all outstanding aio requests have been completed.\n"
" -C, -- report statistics in a machine parsable format\n"
" -P, -- use a pattern to verify read data\n"
+" -i, -- treat request as invalid, for exercising stats\n"
" -v, -- dump buffer to standard output\n"
" -q, -- quiet mode, do not show I/O statistics\n"
"\n");
@@ -1488,7 +1287,7 @@ static const cmdinfo_t aio_read_cmd = {
.cfunc = aio_read_f,
.argmin = 2,
.argmax = -1,
- .args = "[-Cqv] [-P pattern] off len [len..]",
+ .args = "[-Ciqv] [-P pattern] off len [len..]",
.oneline = "asynchronously reads a number of bytes",
.help = aio_read_help,
};
@@ -1499,7 +1298,7 @@ static int aio_read_f(BlockBackend *blk, int argc, char **argv)
struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
ctx->blk = blk;
- while ((c = getopt(argc, argv, "CP:qv")) != -1) {
+ while ((c = getopt(argc, argv, "CP:iqv")) != -1) {
switch (c) {
case 'C':
ctx->Cflag = true;
@@ -1512,6 +1311,11 @@ static int aio_read_f(BlockBackend *blk, int argc, char **argv)
return 0;
}
break;
+ case 'i':
+ printf("injecting invalid read request\n");
+ block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
+ g_free(ctx);
+ return 0;
case 'q':
ctx->qflag = true;
break;
@@ -1569,6 +1373,7 @@ static void aio_write_help(void)
" -P, -- use different pattern to fill file\n"
" -C, -- report statistics in a machine parsable format\n"
" -f, -- use Force Unit Access semantics\n"
+" -i, -- treat request as invalid, for exercising stats\n"
" -q, -- quiet mode, do not show I/O statistics\n"
" -u, -- with -z, allow unmapping\n"
" -z, -- write zeroes using blk_aio_write_zeroes\n"
@@ -1582,7 +1387,7 @@ static const cmdinfo_t aio_write_cmd = {
.cfunc = aio_write_f,
.argmin = 2,
.argmax = -1,
- .args = "[-Cfquz] [-P pattern] off len [len..]",
+ .args = "[-Cfiquz] [-P pattern] off len [len..]",
.oneline = "asynchronously writes a number of bytes",
.help = aio_write_help,
};
@@ -1595,7 +1400,7 @@ static int aio_write_f(BlockBackend *blk, int argc, char **argv)
int flags = 0;
ctx->blk = blk;
- while ((c = getopt(argc, argv, "CfqP:z")) != -1) {
+ while ((c = getopt(argc, argv, "CfiqP:uz")) != -1) {
switch (c) {
case 'C':
ctx->Cflag = true;
@@ -1616,6 +1421,11 @@ static int aio_write_f(BlockBackend *blk, int argc, char **argv)
return 0;
}
break;
+ case 'i':
+ printf("injecting invalid write request\n");
+ block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
+ g_free(ctx);
+ return 0;
case 'z':
ctx->zflag = true;
break;
@@ -1638,6 +1448,7 @@ static int aio_write_f(BlockBackend *blk, int argc, char **argv)
if ((flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) {
printf("-u requires -z to be specified\n");
+ g_free(ctx);
return 0;
}
@@ -2436,7 +2247,6 @@ static void __attribute((constructor)) init_qemuio_commands(void)
qemuio_add_command(&readv_cmd);
qemuio_add_command(&write_cmd);
qemuio_add_command(&writev_cmd);
- qemuio_add_command(&multiwrite_cmd);
qemuio_add_command(&aio_read_cmd);
qemuio_add_command(&aio_write_cmd);
qemuio_add_command(&aio_flush_cmd);
diff --git a/qmp.c b/qmp.c
index e784a67631..8f8ae3a79d 100644
--- a/qmp.c
+++ b/qmp.c
@@ -181,6 +181,7 @@ void qmp_cont(Error **errp)
Error *local_err = NULL;
BlockBackend *blk;
BlockDriverState *bs;
+ BdrvNextIterator *it;
/* if there is a dump in background, we should wait until the dump
* finished */
@@ -199,7 +200,9 @@ void qmp_cont(Error **errp)
for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
blk_iostatus_reset(blk);
}
- for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
+
+ it = NULL;
+ while ((it = bdrv_next(it, &bs))) {
bdrv_add_key(bs, NULL, &local_err);
if (local_err) {
error_propagate(errp, local_err);
diff --git a/tests/qemu-iotests/096 b/tests/qemu-iotests/096
index e34204b8ff..aeeb3753cf 100644
--- a/tests/qemu-iotests/096
+++ b/tests/qemu-iotests/096
@@ -45,8 +45,9 @@ class TestLiveSnapshot(iotests.QMPTestCase):
os.remove(self.target_img)
def checkConfig(self, active_layer):
- result = self.vm.qmp('query-named-block-nodes')
+ result = self.vm.qmp('query-block')
for r in result['return']:
+ r = r['inserted']
if r['node-name'] == active_layer:
self.assertEqual(r['group'], self.group)
self.assertEqual(r['iops'], self.iops)
diff --git a/tests/qemu-iotests/100 b/tests/qemu-iotests/100
deleted file mode 100755
index e66db07982..0000000000
--- a/tests/qemu-iotests/100
+++ /dev/null
@@ -1,152 +0,0 @@
-#!/bin/bash
-#
-# Test simple read/write using plain bdrv_read/bdrv_write
-#
-# Copyright (C) 2014 Red Hat, Inc.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-
-# creator
-owner=stefanha@redhat.com
-
-seq=`basename $0`
-echo "QA output created by $seq"
-
-here=`pwd`
-status=1 # failure is the default!
-
-_cleanup()
-{
- _cleanup_test_img
-}
-trap "_cleanup; exit \$status" 0 1 2 3 15
-
-# get standard environment, filters and checks
-. ./common.rc
-. ./common.filter
-
-_supported_fmt generic
-_supported_proto generic
-_supported_os Linux
-
-
-size=128M
-
-echo
-echo "== Single request =="
-_make_test_img $size
-$QEMU_IO -c "write -z 0 8k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "multiwrite 0 4k" "$TEST_IMG" | _filter_qemu_io
-
-echo
-echo "== verify pattern =="
-$QEMU_IO -c "read -P 0xcd 0 4k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0 4k 4k" "$TEST_IMG" | _filter_qemu_io
-
-_cleanup_test_img
-
-echo
-echo "== Sequential requests =="
-_make_test_img $size
-$QEMU_IO -c "write -z 0 12k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "multiwrite 0 4k ; 4k 4k" "$TEST_IMG" | _filter_qemu_io
-
-echo
-echo "== verify pattern =="
-$QEMU_IO -c "read -P 0xcd 0 4k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0xce 4k 4k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0 8k 4k" "$TEST_IMG" | _filter_qemu_io
-
-_cleanup_test_img
-
-echo
-echo "== Superset overlapping requests =="
-_make_test_img $size
-$QEMU_IO -c "write -z 0 8k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "multiwrite 0 4k ; 1k 2k" "$TEST_IMG" | _filter_qemu_io
-
-echo
-echo "== verify pattern =="
-# Order of overlapping in-flight requests is not guaranteed so we cannot verify
-# [1k, 3k) since it could have either pattern 0xcd or 0xce.
-$QEMU_IO -c "read -P 0xcd 0 1k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0xcd 3k 1k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0 4k 4k" "$TEST_IMG" | _filter_qemu_io
-
-_cleanup_test_img
-
-echo
-echo "== Subset overlapping requests =="
-_make_test_img $size
-$QEMU_IO -c "write -z 0 8k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "multiwrite 1k 2k ; 0k 4k" "$TEST_IMG" | _filter_qemu_io
-
-echo
-echo "== verify pattern =="
-# Order of overlapping in-flight requests is not guaranteed so we cannot verify
-# [1k, 3k) since it could have either pattern 0xcd or 0xce.
-$QEMU_IO -c "read -P 0xce 0 1k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0xce 3k 1k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0 4k 4k" "$TEST_IMG" | _filter_qemu_io
-
-_cleanup_test_img
-
-echo
-echo "== Head overlapping requests =="
-_make_test_img $size
-$QEMU_IO -c "write -z 0 8k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "multiwrite 0k 2k ; 0k 4k" "$TEST_IMG" | _filter_qemu_io
-
-echo
-echo "== verify pattern =="
-# Order of overlapping in-flight requests is not guaranteed so we cannot verify
-# [0k, 2k) since it could have either pattern 0xcd or 0xce.
-$QEMU_IO -c "read -P 0xce 2k 2k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0 4k 4k" "$TEST_IMG" | _filter_qemu_io
-
-_cleanup_test_img
-
-echo
-echo "== Tail overlapping requests =="
-_make_test_img $size
-$QEMU_IO -c "write -z 0 8k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "multiwrite 2k 2k ; 0k 4k" "$TEST_IMG" | _filter_qemu_io
-
-echo
-echo "== verify pattern =="
-# Order of overlapping in-flight requests is not guaranteed so we cannot verify
-# [2k, 4k) since it could have either pattern 0xcd or 0xce.
-$QEMU_IO -c "read -P 0xce 0k 2k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0 4k 4k" "$TEST_IMG" | _filter_qemu_io
-
-_cleanup_test_img
-
-echo
-echo "== Disjoint requests =="
-_make_test_img $size
-$QEMU_IO -c "write -z 0 72k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "multiwrite 0 4k ; 64k 4k" "$TEST_IMG" | _filter_qemu_io
-
-echo
-echo "== verify pattern =="
-$QEMU_IO -c "read -P 0xcd 0 4k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0 4k 60k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0xce 64k 4k" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 0 68k 4k" "$TEST_IMG" | _filter_qemu_io
-
-# success, all done
-echo "*** done"
-rm -f $seq.full
-status=0
diff --git a/tests/qemu-iotests/100.out b/tests/qemu-iotests/100.out
deleted file mode 100644
index a44cae40db..0000000000
--- a/tests/qemu-iotests/100.out
+++ /dev/null
@@ -1,103 +0,0 @@
-QA output created by 100
-
-== Single request ==
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
-wrote 8192/8192 bytes at offset 0
-8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-wrote 4096/4096 bytes at offset 0
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== verify pattern ==
-read 4096/4096 bytes at offset 0
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 4096/4096 bytes at offset 4096
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== Sequential requests ==
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
-wrote 12288/12288 bytes at offset 0
-12 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-wrote 8192/8192 bytes at offset 0
-8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== verify pattern ==
-read 4096/4096 bytes at offset 0
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 4096/4096 bytes at offset 4096
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 4096/4096 bytes at offset 8192
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== Superset overlapping requests ==
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
-wrote 8192/8192 bytes at offset 0
-8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-wrote 6144/6144 bytes at offset 0
-6 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== verify pattern ==
-read 1024/1024 bytes at offset 0
-1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 1024/1024 bytes at offset 3072
-1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 4096/4096 bytes at offset 4096
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== Subset overlapping requests ==
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
-wrote 8192/8192 bytes at offset 0
-8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-wrote 6144/6144 bytes at offset 1024
-6 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== verify pattern ==
-read 1024/1024 bytes at offset 0
-1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 1024/1024 bytes at offset 3072
-1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 4096/4096 bytes at offset 4096
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== Head overlapping requests ==
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
-wrote 8192/8192 bytes at offset 0
-8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-wrote 6144/6144 bytes at offset 0
-6 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== verify pattern ==
-read 2048/2048 bytes at offset 2048
-2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 4096/4096 bytes at offset 4096
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== Tail overlapping requests ==
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
-wrote 8192/8192 bytes at offset 0
-8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-wrote 6144/6144 bytes at offset 2048
-6 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== verify pattern ==
-read 2048/2048 bytes at offset 0
-2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 4096/4096 bytes at offset 4096
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== Disjoint requests ==
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
-wrote 73728/73728 bytes at offset 0
-72 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-wrote 8192/8192 bytes at offset 0
-8 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== verify pattern ==
-read 4096/4096 bytes at offset 0
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 61440/61440 bytes at offset 4096
-60 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 4096/4096 bytes at offset 65536
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 4096/4096 bytes at offset 69632
-4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-*** done
diff --git a/tests/qemu-iotests/109 b/tests/qemu-iotests/109
index f980b0c9e5..adf98892f0 100755
--- a/tests/qemu-iotests/109
+++ b/tests/qemu-iotests/109
@@ -104,8 +104,6 @@ for sample_img in empty.bochs iotest-dirtylog-10G-4M.vhdx parallels-v1 \
$QEMU_IO -c 'read -P 0 0 64k' "$TEST_IMG" | _filter_qemu_io
run_qemu "$TEST_IMG" "$TEST_IMG.src" "'format': 'raw'," "BLOCK_JOB_READY"
- # qemu-img compare can't handle unaligned file sizes
- $QEMU_IMG resize -f raw "$TEST_IMG.src" +0
$QEMU_IMG compare -f raw -F raw "$TEST_IMG" "$TEST_IMG.src"
done
diff --git a/tests/qemu-iotests/109.out b/tests/qemu-iotests/109.out
index 38bc073a37..7c797ed31c 100644
--- a/tests/qemu-iotests/109.out
+++ b/tests/qemu-iotests/109.out
@@ -143,7 +143,6 @@ read 65536/65536 bytes at offset 0
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 2560, "offset": 2560, "speed": 0, "type": "mirror"}}
{"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 2560, "offset": 2560, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
-Image resized.
Warning: Image size mismatch!
Images are identical.
@@ -164,7 +163,6 @@ read 65536/65536 bytes at offset 0
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 31457280, "offset": 31457280, "speed": 0, "type": "mirror"}}
{"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 31457280, "offset": 31457280, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
-Image resized.
Warning: Image size mismatch!
Images are identical.
@@ -185,7 +183,6 @@ read 65536/65536 bytes at offset 0
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 327680, "offset": 327680, "speed": 0, "type": "mirror"}}
{"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 327680, "offset": 327680, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
-Image resized.
Warning: Image size mismatch!
Images are identical.
@@ -206,7 +203,6 @@ read 65536/65536 bytes at offset 0
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "src", "len": 2048, "offset": 2048, "speed": 0, "type": "mirror"}}
{"return": [{"io-status": "ok", "device": "src", "busy": false, "len": 2048, "offset": 2048, "paused": false, "speed": 0, "ready": true, "type": "mirror"}]}
-Image resized.
Warning: Image size mismatch!
Images are identical.
diff --git a/tests/qemu-iotests/136 b/tests/qemu-iotests/136
index e8c6937fc9..635b977552 100644
--- a/tests/qemu-iotests/136
+++ b/tests/qemu-iotests/136
@@ -226,18 +226,11 @@ sector = "%d"
highest_offset = wr_ops * wr_size
- # Two types of invalid operations: unaligned length and unaligned offset
- for i in range(invalid_rd_ops / 2):
- ops.append("aio_read 0 511")
+ for i in range(invalid_rd_ops):
+ ops.append("aio_read -i 0 512")
- for i in range(invalid_rd_ops / 2, invalid_rd_ops):
- ops.append("aio_read 13 512")
-
- for i in range(invalid_wr_ops / 2):
- ops.append("aio_write 0 511")
-
- for i in range(invalid_wr_ops / 2, invalid_wr_ops):
- ops.append("aio_write 13 512")
+ for i in range(invalid_wr_ops):
+ ops.append("aio_write -i 0 512")
for i in range(failed_rd_ops):
ops.append("aio_read %d 512" % bad_offset)
@@ -248,14 +241,6 @@ sector = "%d"
if failed_wr_ops > 0:
highest_offset = max(highest_offset, bad_offset + 512)
- for i in range(wr_merged):
- first = i * wr_size * 2
- second = first + wr_size
- ops.append("multiwrite %d %d ; %d %d" %
- (first, wr_size, second, wr_size))
-
- highest_offset = max(highest_offset, wr_merged * wr_size * 2)
-
# Now perform all operations
for op in ops:
self.vm.hmp_qemu_io("drive0", op)
@@ -309,19 +294,15 @@ sector = "%d"
def test_flush(self):
self.do_test_stats(flush_ops = 8)
- def test_merged(self):
- for i in range(5):
- self.do_test_stats(wr_merged = i * 3)
-
def test_all(self):
# rd_size, rd_ops, wr_size, wr_ops, flush_ops
# invalid_rd_ops, invalid_wr_ops,
# failed_rd_ops, failed_wr_ops
# wr_merged
- test_values = [[512, 1, 512, 1, 1, 4, 7, 5, 2, 1],
- [65536, 1, 2048, 12, 7, 7, 5, 2, 5, 5],
- [32768, 9, 8192, 1, 4, 3, 2, 4, 6, 4],
- [16384, 11, 3584, 16, 9, 8, 6, 7, 3, 4]]
+ test_values = [[512, 1, 512, 1, 1, 4, 7, 5, 2, 0],
+ [65536, 1, 2048, 12, 7, 7, 5, 2, 5, 0],
+ [32768, 9, 8192, 1, 4, 3, 2, 4, 6, 0],
+ [16384, 11, 3584, 16, 9, 8, 6, 7, 3, 0]]
for i in test_values:
self.do_test_stats(*i)
diff --git a/tests/qemu-iotests/136.out b/tests/qemu-iotests/136.out
index 0a5e9583a4..cfa5c0d0e6 100644
--- a/tests/qemu-iotests/136.out
+++ b/tests/qemu-iotests/136.out
@@ -1,5 +1,5 @@
-........................................
+...................................
----------------------------------------------------------------------
-Ran 40 tests
+Ran 35 tests
OK
diff --git a/tests/qemu-iotests/154 b/tests/qemu-iotests/154
new file mode 100755
index 0000000000..23f1b3ab16
--- /dev/null
+++ b/tests/qemu-iotests/154
@@ -0,0 +1,265 @@
+#!/bin/bash
+#
+# qcow2 specific bdrv_write_zeroes tests with backing files (complements 034)
+#
+# Copyright (C) 2016 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=kwolf@redhat.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+status=1 # failure is the default!
+
+_cleanup()
+{
+ _cleanup_test_img
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+_supported_fmt qcow2
+_supported_proto file
+_supported_os Linux
+
+CLUSTER_SIZE=4k
+size=128M
+
+echo
+echo == backing file contains zeros ==
+
+CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size
+_make_test_img -b "$TEST_IMG.base"
+
+# Make sure that the whole cluster is allocated even for partial write_zeroes
+# when the backing file contains zeros
+
+# X = non-zero data sector in backing file
+# - = sector unallocated in whole backing chain
+# 0 = sector touched by write_zeroes request
+
+# 1. Tail unaligned: 00 00 -- --
+# 2. Head unaligned: -- -- 00 00
+# 3. Both unaligned: -- 00 00 --
+# 4. Both, 2 clusters: -- -- -- 00 | 00 -- -- --
+
+$QEMU_IO -c "write -z 0 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "write -z 10k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "write -z 17k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "write -z 27k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
+
+echo
+echo == backing file contains non-zero data before write_zeroes ==
+
+CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size
+_make_test_img -b "$TEST_IMG.base"
+
+# Single cluster; non-zero data at the cluster start
+# ... | XX -- 00 -- | ...
+$QEMU_IO -c "write -P 0x11 32k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 34k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 32k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 33k 3k" "$TEST_IMG" | _filter_qemu_io
+
+# Single cluster; non-zero data exists, but not at the cluster start
+# ... | -- XX 00 -- | ...
+$QEMU_IO -c "write -P 0x11 65k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 66k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 65k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 64k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 66k 2k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
+
+echo
+echo == backing file contains non-zero data after write_zeroes ==
+
+CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size
+_make_test_img -b "$TEST_IMG.base"
+
+# Single cluster; non-zero data directly after request
+# ... | -- 00 XX -- | ...
+$QEMU_IO -c "write -P 0x11 34k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 33k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 32k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 34k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 35k 1k" "$TEST_IMG" | _filter_qemu_io
+
+# Single cluster; non-zero data exists, but not directly after request
+# ... | -- 00 -- XX | ...
+$QEMU_IO -c "write -P 0x11 43k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 41k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 43k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 40k 3k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
+
+echo
+echo == spanning two clusters, non-zero before request ==
+
+CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size
+_make_test_img -b "$TEST_IMG.base"
+
+# Two clusters; non-zero data before request:
+# 1. At cluster start: 32k: XX -- -- 00 | 00 -- -- --
+# 2. Between unallocated space: 48k: -- XX -- 00 | 00 -- -- --
+# 3. Directly before request: 64k: -- -- XX 00 | 00 -- -- --
+
+$QEMU_IO -c "write -P 0x11 32k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 35k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 32k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 33k 7k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IO -c "write -P 0x11 49k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 51k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 48k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 49k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 50k 6k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IO -c "write -P 0x11 66k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 67k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 64k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 66k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 67k 5k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
+
+echo
+echo == spanning two clusters, non-zero after request ==
+
+CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size
+_make_test_img -b "$TEST_IMG.base"
+
+# Two clusters; non-zero data after request:
+# 1. Directly after request: 32k: -- -- -- 00 | 00 XX -- --
+# 2. Between unallocated space: 48k: -- -- -- 00 | 00 -- XX --
+# 3. At cluster end: 64k: -- -- -- 00 | 00 -- -- XX
+
+$QEMU_IO -c "write -P 0x11 37k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 35k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 32k 5k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 37k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 38k 2k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IO -c "write -P 0x11 54k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 51k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 48k 6k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 54k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 55k 1k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IO -c "write -P 0x11 71k 1k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 67k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 64k 7k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 71k 1k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
+
+echo
+echo == spanning two clusters, partially overwriting backing file ==
+
+CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size
+_make_test_img -b "$TEST_IMG.base"
+
+# Backing file: -- -- XX XX | XX XX -- --
+# Active layer: -- -- XX 00 | 00 XX -- --
+
+$QEMU_IO -c "write -P 0x11 2k 4k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 3k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 0k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 2k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 3k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 5k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 6k 2k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
+
+echo
+echo == spanning multiple clusters, non-zero in first cluster ==
+
+CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size
+_make_test_img -b "$TEST_IMG.base"
+
+# Backing file: 64k: XX XX -- -- | -- -- -- -- | -- -- -- --
+# Active layer: 64k: XX XX 00 00 | 00 00 00 00 | 00 -- -- --
+
+$QEMU_IO -c "write -P 0x11 64k 2k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 66k 7k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 64k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 66k 10k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
+
+echo
+echo == spanning multiple clusters, non-zero in intermediate cluster ==
+
+CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size
+_make_test_img -b "$TEST_IMG.base"
+
+# Backing file: 64k: -- -- -- -- | -- XX XX -- | -- -- -- --
+# Active layer: 64k: -- -- 00 00 | 00 00 00 00 | 00 -- -- --
+
+$QEMU_IO -c "write -P 0x11 69k 2k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 66k 7k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 64k 12k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
+
+echo
+echo == spanning multiple clusters, non-zero in final cluster ==
+
+CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size
+_make_test_img -b "$TEST_IMG.base"
+
+# Backing file: 64k: -- -- -- -- | -- -- -- -- | -- -- XX XX
+# Active layer: 64k: -- -- 00 00 | 00 00 00 00 | 00 -- XX XX
+
+$QEMU_IO -c "write -P 0x11 74k 2k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 66k 7k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 64k 10k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 74k 2k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
+
+echo
+echo == spanning multiple clusters, partially overwriting backing file ==
+
+CLUSTER_SIZE=512 TEST_IMG="$TEST_IMG.base" _make_test_img $size
+_make_test_img -b "$TEST_IMG.base"
+
+# Backing file: 64k: -- XX XX XX | XX XX XX XX | XX XX XX --
+# Active layer: 64k: -- XX 00 00 | 00 00 00 00 | 00 XX XX --
+
+$QEMU_IO -c "write -P 0x11 65k 10k" "$TEST_IMG.base" | _filter_qemu_io
+$QEMU_IO -c "write -z 66k 7k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 64k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 65k 1k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 66k 7k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0x11 73k 2k" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "read -P 0 75k 1k" "$TEST_IMG" | _filter_qemu_io
+
+$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0
diff --git a/tests/qemu-iotests/154.out b/tests/qemu-iotests/154.out
new file mode 100644
index 0000000000..8946b734ac
--- /dev/null
+++ b/tests/qemu-iotests/154.out
@@ -0,0 +1,242 @@
+QA output created by 154
+
+== backing file contains zeros ==
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base
+wrote 2048/2048 bytes at offset 0
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 10240
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 17408
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 27648
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+[{ "start": 0, "length": 4096, "depth": 0, "zero": true, "data": false},
+{ "start": 4096, "length": 4096, "depth": 1, "zero": true, "data": false},
+{ "start": 8192, "length": 4096, "depth": 0, "zero": true, "data": false},
+{ "start": 12288, "length": 4096, "depth": 1, "zero": true, "data": false},
+{ "start": 16384, "length": 4096, "depth": 0, "zero": true, "data": false},
+{ "start": 20480, "length": 4096, "depth": 1, "zero": true, "data": false},
+{ "start": 24576, "length": 8192, "depth": 0, "zero": true, "data": false},
+{ "start": 32768, "length": 134184960, "depth": 1, "zero": true, "data": false}]
+
+== backing file contains non-zero data before write_zeroes ==
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base
+wrote 1024/1024 bytes at offset 32768
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 34816
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 32768
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 3072/3072 bytes at offset 33792
+3 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 66560
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 67584
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 66560
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 65536
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 2048/2048 bytes at offset 67584
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+[{ "start": 0, "length": 32768, "depth": 1, "zero": true, "data": false},
+{ "start": 32768, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480},
+{ "start": 36864, "length": 28672, "depth": 1, "zero": true, "data": false},
+{ "start": 65536, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 24576},
+{ "start": 69632, "length": 134148096, "depth": 1, "zero": true, "data": false}]
+
+== backing file contains non-zero data after write_zeroes ==
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base
+wrote 1024/1024 bytes at offset 34816
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 33792
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 2048/2048 bytes at offset 32768
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 34816
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 35840
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 44032
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 41984
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 44032
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 3072/3072 bytes at offset 40960
+3 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+[{ "start": 0, "length": 32768, "depth": 1, "zero": true, "data": false},
+{ "start": 32768, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480},
+{ "start": 36864, "length": 4096, "depth": 1, "zero": true, "data": false},
+{ "start": 40960, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 24576},
+{ "start": 45056, "length": 134172672, "depth": 1, "zero": true, "data": false}]
+
+== spanning two clusters, non-zero before request ==
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base
+wrote 1024/1024 bytes at offset 32768
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 35840
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 32768
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 7168/7168 bytes at offset 33792
+7 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 50176
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 52224
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 49152
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 50176
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 6144/6144 bytes at offset 51200
+6 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 67584
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 68608
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 2048/2048 bytes at offset 65536
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 67584
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 5120/5120 bytes at offset 68608
+5 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+[{ "start": 0, "length": 32768, "depth": 1, "zero": true, "data": false},
+{ "start": 32768, "length": 8192, "depth": 0, "zero": false, "data": true, "offset": 20480},
+{ "start": 40960, "length": 8192, "depth": 1, "zero": true, "data": false},
+{ "start": 49152, "length": 8192, "depth": 0, "zero": false, "data": true, "offset": 28672},
+{ "start": 57344, "length": 8192, "depth": 1, "zero": true, "data": false},
+{ "start": 65536, "length": 8192, "depth": 0, "zero": false, "data": true, "offset": 36864},
+{ "start": 73728, "length": 134144000, "depth": 1, "zero": true, "data": false}]
+
+== spanning two clusters, non-zero after request ==
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base
+wrote 1024/1024 bytes at offset 37888
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 35840
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 5120/5120 bytes at offset 32768
+5 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 37888
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 2048/2048 bytes at offset 38912
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 55296
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 52224
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 6144/6144 bytes at offset 49152
+6 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 55296
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 56320
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 1024/1024 bytes at offset 72704
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 68608
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 7168/7168 bytes at offset 65536
+7 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 72704
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+[{ "start": 0, "length": 32768, "depth": 1, "zero": true, "data": false},
+{ "start": 32768, "length": 8192, "depth": 0, "zero": false, "data": true, "offset": 20480},
+{ "start": 40960, "length": 8192, "depth": 1, "zero": true, "data": false},
+{ "start": 49152, "length": 8192, "depth": 0, "zero": false, "data": true, "offset": 28672},
+{ "start": 57344, "length": 8192, "depth": 1, "zero": true, "data": false},
+{ "start": 65536, "length": 8192, "depth": 0, "zero": false, "data": true, "offset": 36864},
+{ "start": 73728, "length": 134144000, "depth": 1, "zero": true, "data": false}]
+
+== spanning two clusters, partially overwriting backing file ==
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base
+wrote 4096/4096 bytes at offset 2048
+4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 2048/2048 bytes at offset 3072
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 2048/2048 bytes at offset 0
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 2048
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 2048/2048 bytes at offset 3072
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 5120
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 2048/2048 bytes at offset 6144
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+[{ "start": 0, "length": 8192, "depth": 0, "zero": false, "data": true, "offset": 20480},
+{ "start": 8192, "length": 134209536, "depth": 1, "zero": true, "data": false}]
+
+== spanning multiple clusters, non-zero in first cluster ==
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base
+wrote 2048/2048 bytes at offset 65536
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 7168/7168 bytes at offset 67584
+7 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 2048/2048 bytes at offset 65536
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 10240/10240 bytes at offset 67584
+10 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+[{ "start": 0, "length": 65536, "depth": 1, "zero": true, "data": false},
+{ "start": 65536, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480},
+{ "start": 69632, "length": 8192, "depth": 0, "zero": true, "data": false},
+{ "start": 77824, "length": 134139904, "depth": 1, "zero": true, "data": false}]
+
+== spanning multiple clusters, non-zero in intermediate cluster ==
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base
+wrote 2048/2048 bytes at offset 70656
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 7168/7168 bytes at offset 67584
+7 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 12288/12288 bytes at offset 65536
+12 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+[{ "start": 0, "length": 65536, "depth": 1, "zero": true, "data": false},
+{ "start": 65536, "length": 12288, "depth": 0, "zero": true, "data": false},
+{ "start": 77824, "length": 134139904, "depth": 1, "zero": true, "data": false}]
+
+== spanning multiple clusters, non-zero in final cluster ==
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base
+wrote 2048/2048 bytes at offset 75776
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 7168/7168 bytes at offset 67584
+7 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 10240/10240 bytes at offset 65536
+10 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 2048/2048 bytes at offset 75776
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+[{ "start": 0, "length": 65536, "depth": 1, "zero": true, "data": false},
+{ "start": 65536, "length": 8192, "depth": 0, "zero": true, "data": false},
+{ "start": 73728, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480},
+{ "start": 77824, "length": 134139904, "depth": 1, "zero": true, "data": false}]
+
+== spanning multiple clusters, partially overwriting backing file ==
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base
+wrote 10240/10240 bytes at offset 66560
+10 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 7168/7168 bytes at offset 67584
+7 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 65536
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 66560
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 7168/7168 bytes at offset 67584
+7 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 2048/2048 bytes at offset 74752
+2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 1024/1024 bytes at offset 76800
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+[{ "start": 0, "length": 65536, "depth": 1, "zero": true, "data": false},
+{ "start": 65536, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 20480},
+{ "start": 69632, "length": 4096, "depth": 0, "zero": true, "data": false},
+{ "start": 73728, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": 24576},
+{ "start": 77824, "length": 134139904, "depth": 1, "zero": true, "data": false}]
+*** done
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index 822953b6fa..ab1d76efdf 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -106,7 +106,7 @@
097 rw auto backing
098 rw auto backing quick
099 rw auto quick
-100 rw auto quick
+# 100 was removed, do not reuse
101 rw auto quick
102 rw auto quick
103 rw auto quick
@@ -153,3 +153,4 @@
149 rw auto sudo
150 rw auto quick
152 rw auto quick
+154 rw auto backing quick
diff --git a/tests/test-throttle.c b/tests/test-throttle.c
index 744a524368..5ec966c8a4 100644
--- a/tests/test-throttle.c
+++ b/tests/test-throttle.c
@@ -20,6 +20,7 @@
#include "qemu/throttle.h"
#include "qemu/error-report.h"
#include "block/throttle-groups.h"
+#include "sysemu/block-backend.h"
static AioContext *ctx;
static LeakyBucket bkt;
@@ -574,27 +575,32 @@ static void test_accounting(void)
static void test_groups(void)
{
ThrottleConfig cfg1, cfg2;
- BlockDriverState *bdrv1, *bdrv2, *bdrv3;
+ BlockBackend *blk1, *blk2, *blk3;
+ BlockBackendPublic *blkp1, *blkp2, *blkp3;
- bdrv1 = bdrv_new();
- bdrv2 = bdrv_new();
- bdrv3 = bdrv_new();
+ blk1 = blk_new_with_bs(&error_abort);
+ blk2 = blk_new_with_bs(&error_abort);
+ blk3 = blk_new_with_bs(&error_abort);
- g_assert(bdrv1->throttle_state == NULL);
- g_assert(bdrv2->throttle_state == NULL);
- g_assert(bdrv3->throttle_state == NULL);
+ blkp1 = blk_get_public(blk1);
+ blkp2 = blk_get_public(blk2);
+ blkp3 = blk_get_public(blk3);
- throttle_group_register_bs(bdrv1, "bar");
- throttle_group_register_bs(bdrv2, "foo");
- throttle_group_register_bs(bdrv3, "bar");
+ g_assert(blkp1->throttle_state == NULL);
+ g_assert(blkp2->throttle_state == NULL);
+ g_assert(blkp3->throttle_state == NULL);
- g_assert(bdrv1->throttle_state != NULL);
- g_assert(bdrv2->throttle_state != NULL);
- g_assert(bdrv3->throttle_state != NULL);
+ throttle_group_register_blk(blk1, "bar");
+ throttle_group_register_blk(blk2, "foo");
+ throttle_group_register_blk(blk3, "bar");
- g_assert(!strcmp(throttle_group_get_name(bdrv1), "bar"));
- g_assert(!strcmp(throttle_group_get_name(bdrv2), "foo"));
- g_assert(bdrv1->throttle_state == bdrv3->throttle_state);
+ g_assert(blkp1->throttle_state != NULL);
+ g_assert(blkp2->throttle_state != NULL);
+ g_assert(blkp3->throttle_state != NULL);
+
+ g_assert(!strcmp(throttle_group_get_name(blk1), "bar"));
+ g_assert(!strcmp(throttle_group_get_name(blk2), "foo"));
+ g_assert(blkp1->throttle_state == blkp3->throttle_state);
/* Setting the config of a group member affects the whole group */
throttle_config_init(&cfg1);
@@ -602,29 +608,29 @@ static void test_groups(void)
cfg1.buckets[THROTTLE_BPS_WRITE].avg = 285000;
cfg1.buckets[THROTTLE_OPS_READ].avg = 20000;
cfg1.buckets[THROTTLE_OPS_WRITE].avg = 12000;
- throttle_group_config(bdrv1, &cfg1);
+ throttle_group_config(blk1, &cfg1);
- throttle_group_get_config(bdrv1, &cfg1);
- throttle_group_get_config(bdrv3, &cfg2);
+ throttle_group_get_config(blk1, &cfg1);
+ throttle_group_get_config(blk3, &cfg2);
g_assert(!memcmp(&cfg1, &cfg2, sizeof(cfg1)));
cfg2.buckets[THROTTLE_BPS_READ].avg = 4547;
cfg2.buckets[THROTTLE_BPS_WRITE].avg = 1349;
cfg2.buckets[THROTTLE_OPS_READ].avg = 123;
cfg2.buckets[THROTTLE_OPS_WRITE].avg = 86;
- throttle_group_config(bdrv3, &cfg1);
+ throttle_group_config(blk3, &cfg1);
- throttle_group_get_config(bdrv1, &cfg1);
- throttle_group_get_config(bdrv3, &cfg2);
+ throttle_group_get_config(blk1, &cfg1);
+ throttle_group_get_config(blk3, &cfg2);
g_assert(!memcmp(&cfg1, &cfg2, sizeof(cfg1)));
- throttle_group_unregister_bs(bdrv1);
- throttle_group_unregister_bs(bdrv2);
- throttle_group_unregister_bs(bdrv3);
+ throttle_group_unregister_blk(blk1);
+ throttle_group_unregister_blk(blk2);
+ throttle_group_unregister_blk(blk3);
- g_assert(bdrv1->throttle_state == NULL);
- g_assert(bdrv2->throttle_state == NULL);
- g_assert(bdrv3->throttle_state == NULL);
+ g_assert(blkp1->throttle_state == NULL);
+ g_assert(blkp2->throttle_state == NULL);
+ g_assert(blkp3->throttle_state == NULL);
}
int main(int argc, char **argv)
diff --git a/trace-events b/trace-events
index e35b80e980..b53c3541a3 100644
--- a/trace-events
+++ b/trace-events
@@ -62,8 +62,6 @@ bdrv_open_common(void *bs, const char *filename, int flags, const char *format_n
bdrv_lock_medium(void *bs, bool locked) "bs %p locked %d"
# block/io.c
-multiwrite_cb(void *mcb, int ret) "mcb %p ret %d"
-bdrv_aio_multiwrite(void *mcb, int num_callbacks, int num_reqs) "mcb %p num_callbacks %d num_reqs %d"
bdrv_aio_discard(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
bdrv_aio_flush(void *bs, void *opaque) "bs %p opaque %p"
bdrv_aio_readv(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"