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Block layer patches 

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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches

# gpg: Signature made Wed 25 May 2016 18:32:40 BST using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"

* remotes/kevin/tags/for-upstream: (31 commits)
  blockjob: Remove BlockJob.bs
  commit: Use BlockBackend for I/O
  backup: Use BlockBackend for I/O
  backup: Remove bs parameter from backup_do_cow()
  backup: Pack Notifier within BackupBlockJob
  backup: Don't leak BackupBlockJob in error path
  mirror: Use BlockBackend for I/O
  mirror: Allow target that already has a BlockBackend
  stream: Use BlockBackend for I/O
  block: Make blk_co_preadv/pwritev() public
  block: Convert block job core to BlockBackend
  block: Default to enabled write cache in blk_new()
  block: Cancel jobs first in bdrv_close_all()
  block: keep a list of block jobs
  block: Rename blk_write_zeroes()
  dma-helpers: change BlockBackend to opaque value in DMAIOFunc
  dma-helpers: change interface to byte-based
  block: Propagate .drained_begin/end callbacks
  block: Fix reconfiguring graph with drained nodes
  block: Make bdrv_drain() use bdrv_drained_begin/end()
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
master
Peter Maydell 2016-05-26 14:29:29 +01:00
parent a62c89117f b75536c9fa
commit 2c56d06baf
34 changed files with 602 additions and 573 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

245
block.c
View File

@ -64,16 +64,16 @@ static QTAILQ_HEAD(, BlockDriverState) all_bdrv_states =
static QLIST_HEAD(, BlockDriver) bdrv_drivers =
QLIST_HEAD_INITIALIZER(bdrv_drivers);
static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
const char *reference, QDict *options, int flags,
BlockDriverState *parent,
const BdrvChildRole *child_role, Error **errp);
static BlockDriverState *bdrv_open_inherit(const char *filename,
const char *reference,
QDict *options, int flags,
BlockDriverState *parent,
const BdrvChildRole *child_role,
Error **errp);
/* If non-zero, use only whitelisted block drivers */
static int use_bdrv_whitelist;
static void bdrv_close(BlockDriverState *bs);
#ifdef _WIN32
static int is_windows_drive_prefix(const char *filename)
{
@ -220,11 +220,6 @@ void bdrv_register(BlockDriver *bdrv)
QLIST_INSERT_HEAD(&bdrv_drivers, bdrv, list);
}
BlockDriverState *bdrv_new_root(void)
{
return bdrv_new();
}
BlockDriverState *bdrv_new(void)
{
BlockDriverState *bs;
@ -664,6 +659,18 @@ int bdrv_parse_cache_mode(const char *mode, int *flags, bool *writethrough)
return 0;
}
static void bdrv_child_cb_drained_begin(BdrvChild *child)
{
BlockDriverState *bs = child->opaque;
bdrv_drained_begin(bs);
}
static void bdrv_child_cb_drained_end(BdrvChild *child)
{
BlockDriverState *bs = child->opaque;
bdrv_drained_end(bs);
}
/*
* Returns the options and flags that a temporary snapshot should get, based on
* the originally requested flags (the originally requested image will have
@ -710,6 +717,8 @@ static void bdrv_inherited_options(int *child_flags, QDict *child_options,
const BdrvChildRole child_file = {
.inherit_options = bdrv_inherited_options,
.drained_begin = bdrv_child_cb_drained_begin,
.drained_end = bdrv_child_cb_drained_end,
};
/*
@ -728,6 +737,8 @@ static void bdrv_inherited_fmt_options(int *child_flags, QDict *child_options,
const BdrvChildRole child_format = {
.inherit_options = bdrv_inherited_fmt_options,
.drained_begin = bdrv_child_cb_drained_begin,
.drained_end = bdrv_child_cb_drained_end,
};
/*
@ -755,6 +766,8 @@ static void bdrv_backing_options(int *child_flags, QDict *child_options,
static const BdrvChildRole child_backing = {
.inherit_options = bdrv_backing_options,
.drained_begin = bdrv_child_cb_drained_begin,
.drained_end = bdrv_child_cb_drained_end,
};
static int bdrv_open_flags(BlockDriverState *bs, int flags)
@ -1155,18 +1168,41 @@ static int bdrv_fill_options(QDict **options, const char *filename,
return 0;
}
static void bdrv_replace_child(BdrvChild *child, BlockDriverState *new_bs)
{
BlockDriverState *old_bs = child->bs;
if (old_bs) {
if (old_bs->quiesce_counter && child->role->drained_end) {
child->role->drained_end(child);
}
QLIST_REMOVE(child, next_parent);
}
child->bs = new_bs;
if (new_bs) {
QLIST_INSERT_HEAD(&new_bs->parents, child, next_parent);
if (new_bs->quiesce_counter && child->role->drained_begin) {
child->role->drained_begin(child);
}
}
}
BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs,
const char *child_name,
const BdrvChildRole *child_role)
const BdrvChildRole *child_role,
void *opaque)
{
BdrvChild *child = g_new(BdrvChild, 1);
*child = (BdrvChild) {
.bs = child_bs,
.bs = NULL,
.name = g_strdup(child_name),
.role = child_role,
.opaque = opaque,
};
QLIST_INSERT_HEAD(&child_bs->parents, child, next_parent);
bdrv_replace_child(child, child_bs);
return child;
}
@ -1176,7 +1212,8 @@ BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs,
const char *child_name,
const BdrvChildRole *child_role)
{
BdrvChild *child = bdrv_root_attach_child(child_bs, child_name, child_role);
BdrvChild *child = bdrv_root_attach_child(child_bs, child_name, child_role,
parent_bs);
QLIST_INSERT_HEAD(&parent_bs->children, child, next);
return child;
}
@ -1187,7 +1224,9 @@ static void bdrv_detach_child(BdrvChild *child)
QLIST_REMOVE(child, next);
child->next.le_prev = NULL;
}
QLIST_REMOVE(child, next_parent);
bdrv_replace_child(child, NULL);
g_free(child->name);
g_free(child);
}
@ -1341,14 +1380,13 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options,
qdict_put(options, "driver", qstring_from_str(bs->backing_format));
}
backing_hd = NULL;
ret = bdrv_open_inherit(&backing_hd,
*backing_filename ? backing_filename : NULL,
reference, options, 0, bs, &child_backing,
errp);
if (ret < 0) {
backing_hd = bdrv_open_inherit(*backing_filename ? backing_filename : NULL,
reference, options, 0, bs, &child_backing,
errp);
if (!backing_hd) {
bs->open_flags |= BDRV_O_NO_BACKING;
error_prepend(errp, "Could not open backing file: ");
ret = -EINVAL;
goto free_exit;
}
@ -1388,7 +1426,6 @@ BdrvChild *bdrv_open_child(const char *filename,
BdrvChild *c = NULL;
BlockDriverState *bs;
QDict *image_options;
int ret;
char *bdref_key_dot;
const char *reference;
@ -1408,10 +1445,9 @@ BdrvChild *bdrv_open_child(const char *filename,
goto done;
}
bs = NULL;
ret = bdrv_open_inherit(&bs, filename, reference, image_options, 0,
parent, child_role, errp);
if (ret < 0) {
bs = bdrv_open_inherit(filename, reference, image_options, 0,
parent, child_role, errp);
if (!bs) {
goto done;
}
@ -1422,15 +1458,16 @@ done:
return c;
}
static int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags,
QDict *snapshot_options, Error **errp)
static BlockDriverState *bdrv_append_temp_snapshot(BlockDriverState *bs,
int flags,
QDict *snapshot_options,
Error **errp)
{
/* TODO: extra byte is a hack to ensure MAX_PATH space on Windows. */
char *tmp_filename = g_malloc0(PATH_MAX + 1);
int64_t total_size;
QemuOpts *opts = NULL;
BlockDriverState *bs_snapshot;
Error *local_err = NULL;
int ret;
/* if snapshot, we create a temporary backing file and open it
@ -1439,7 +1476,6 @@ static int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags,
/* Get the required size from the image */
total_size = bdrv_getlength(bs);
if (total_size < 0) {
ret = total_size;
error_setg_errno(errp, -total_size, "Could not get image size");
goto out;
}
@ -1470,22 +1506,26 @@ static int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags,
qdict_put(snapshot_options, "driver",
qstring_from_str("qcow2"));
bs_snapshot = bdrv_new();
ret = bdrv_open(&bs_snapshot, NULL, NULL, snapshot_options,
flags, &local_err);
bs_snapshot = bdrv_open(NULL, NULL, snapshot_options, flags, errp);
snapshot_options = NULL;
if (ret < 0) {
error_propagate(errp, local_err);
if (!bs_snapshot) {
ret = -EINVAL;
goto out;
}
/* bdrv_append() consumes a strong reference to bs_snapshot (i.e. it will
* call bdrv_unref() on it), so in order to be able to return one, we have
* to increase bs_snapshot's refcount here */
bdrv_ref(bs_snapshot);
bdrv_append(bs_snapshot, bs);
g_free(tmp_filename);
return bs_snapshot;
out:
QDECREF(snapshot_options);
g_free(tmp_filename);
return ret;
return NULL;
}
/*
@ -1503,10 +1543,12 @@ out:
* should be opened. If specified, neither options nor a filename may be given,
* nor can an existing BDS be reused (that is, *pbs has to be NULL).
*/
static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
const char *reference, QDict *options, int flags,
BlockDriverState *parent,
const BdrvChildRole *child_role, Error **errp)
static BlockDriverState *bdrv_open_inherit(const char *filename,
const char *reference,
QDict *options, int flags,
BlockDriverState *parent,
const BdrvChildRole *child_role,
Error **errp)
{
int ret;
BdrvChild *file = NULL;
@ -1518,7 +1560,6 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
QDict *snapshot_options = NULL;
int snapshot_flags = 0;
assert(pbs);
assert(!child_role || !flags);
assert(!child_role == !parent);
@ -1526,33 +1567,22 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
bool options_non_empty = options ? qdict_size(options) : false;
QDECREF(options);
if (*pbs) {
error_setg(errp, "Cannot reuse an existing BDS when referencing "
"another block device");
return -EINVAL;
}
if (filename || options_non_empty) {
error_setg(errp, "Cannot reference an existing block device with "
"additional options or a new filename");
return -EINVAL;
return NULL;
}
bs = bdrv_lookup_bs(reference, reference, errp);
if (!bs) {
return -ENODEV;
return NULL;
}
bdrv_ref(bs);
*pbs = bs;
return 0;
return bs;
}
if (*pbs) {
bs = *pbs;
} else {
bs = bdrv_new();
}
bs = bdrv_new();
/* NULL means an empty set of options */
if (options == NULL) {
@ -1562,7 +1592,6 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
/* json: syntax counts as explicit options, as if in the QDict */
parse_json_protocol(options, &filename, &local_err);
if (local_err) {
ret = -EINVAL;
goto fail;
}
@ -1589,7 +1618,6 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
drv = bdrv_find_format(drvname);
if (!drv) {
error_setg(errp, "Unknown driver: '%s'", drvname);
ret = -EINVAL;
goto fail;
}
}
@ -1619,7 +1647,6 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
file = bdrv_open_child(filename, options, "file", bs,
&child_file, true, &local_err);
if (local_err) {
ret = -EINVAL;
goto fail;
}
}
@ -1646,7 +1673,6 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
qdict_put(options, "driver", qstring_from_str(drv->format_name));
} else if (!drv) {
error_setg(errp, "Must specify either driver or file");
ret = -EINVAL;
goto fail;
}
@ -1689,7 +1715,6 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
drv->format_name, entry->key);
}
ret = -EINVAL;
goto close_and_fail;
}
@ -1700,25 +1725,30 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
&& !runstate_check(RUN_STATE_PAUSED)) { /* HACK */
error_setg(errp,
"Guest must be stopped for opening of encrypted image");
ret = -EBUSY;
goto close_and_fail;
}
QDECREF(options);
*pbs = bs;
/* For snapshot=on, create a temporary qcow2 overlay. bs points to the
* temporary snapshot afterwards. */
if (snapshot_flags) {
ret = bdrv_append_temp_snapshot(bs, snapshot_flags, snapshot_options,
&local_err);
BlockDriverState *snapshot_bs;
snapshot_bs = bdrv_append_temp_snapshot(bs, snapshot_flags,
snapshot_options, &local_err);
snapshot_options = NULL;
if (local_err) {
goto close_and_fail;
}
/* We are not going to return bs but the overlay on top of it
* (snapshot_bs); thus, we have to drop the strong reference to bs
* (which we obtained by calling bdrv_new()). bs will not be deleted,
* though, because the overlay still has a reference to it. */
bdrv_unref(bs);
bs = snapshot_bs;
}
return 0;
return bs;
fail:
if (file != NULL) {
@ -1729,36 +1759,26 @@ fail:
QDECREF(bs->options);
QDECREF(options);
bs->options = NULL;
if (!*pbs) {
/* If *pbs is NULL, a new BDS has been created in this function and
needs to be freed now. Otherwise, it does not need to be closed,
since it has not really been opened yet. */
bdrv_unref(bs);
}
bdrv_unref(bs);
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
return NULL;
close_and_fail:
/* See fail path, but now the BDS has to be always closed */
if (*pbs) {
bdrv_close(bs);
} else {
bdrv_unref(bs);
}
bdrv_unref(bs);
QDECREF(snapshot_options);
QDECREF(options);
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
return NULL;
}
int bdrv_open(BlockDriverState **pbs, const char *filename,
const char *reference, QDict *options, int flags, Error **errp)
BlockDriverState *bdrv_open(const char *filename, const char *reference,
QDict *options, int flags, Error **errp)
{
return bdrv_open_inherit(pbs, filename, reference, options, flags, NULL,
return bdrv_open_inherit(filename, reference, options, flags, NULL,
NULL, errp);
}
@ -2132,6 +2152,7 @@ static void bdrv_close(BlockDriverState *bs)
BdrvAioNotifier *ban, *ban_next;
assert(!bs->job);
assert(!bs->refcnt);
bdrv_drained_begin(bs); /* complete I/O */
bdrv_flush(bs);
@ -2140,8 +2161,6 @@ static void bdrv_close(BlockDriverState *bs)
bdrv_release_named_dirty_bitmaps(bs);
assert(QLIST_EMPTY(&bs->dirty_bitmaps));
bdrv_parent_cb_change_media(bs, false);
if (bs->drv) {
BdrvChild *child, *next;
@ -2190,8 +2209,7 @@ static void bdrv_close(BlockDriverState *bs)
void bdrv_close_all(void)
{
BlockDriverState *bs;
AioContext *aio_context;
block_job_cancel_sync_all();
/* Drop references from requests still in flight, such as canceled block
* jobs whose AIO context has not been polled yet */
@ -2200,25 +2218,7 @@ void bdrv_close_all(void)
blk_remove_all_bs();
blockdev_close_all_bdrv_states();
/* Cancel all block jobs */
while (!QTAILQ_EMPTY(&all_bdrv_states)) {
QTAILQ_FOREACH(bs, &all_bdrv_states, bs_list) {
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
if (bs->job) {
block_job_cancel_sync(bs->job);
aio_context_release(aio_context);
break;
}
aio_context_release(aio_context);
}
/* All the remaining BlockDriverStates are referenced directly or
* indirectly from block jobs, so there needs to be at least one BDS
* directly used by a block job */
assert(bs);
}
assert(QTAILQ_EMPTY(&all_bdrv_states));
}
static void change_parent_backing_link(BlockDriverState *from,
@ -2228,10 +2228,8 @@ static void change_parent_backing_link(BlockDriverState *from,
QLIST_FOREACH_SAFE(c, &from->parents, next_parent, next) {
assert(c->role != &child_backing);
c->bs = to;
QLIST_REMOVE(c, next_parent);
QLIST_INSERT_HEAD(&to->parents, c, next_parent);
bdrv_ref(to);
bdrv_replace_child(c, to);
bdrv_unref(from);
}
}
@ -3195,9 +3193,9 @@ void bdrv_invalidate_cache_all(Error **errp)
{
BlockDriverState *bs;
Error *local_err = NULL;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
while ((it = bdrv_next(it, &bs)) != NULL) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
@ -3239,11 +3237,11 @@ static int bdrv_inactivate_recurse(BlockDriverState *bs,
int bdrv_inactivate_all(void)
{
BlockDriverState *bs = NULL;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
int ret = 0;
int pass;
while ((it = bdrv_next(it, &bs)) != NULL) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
aio_context_acquire(bdrv_get_aio_context(bs));
}
@ -3252,8 +3250,7 @@ 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++) {
it = NULL;
while ((it = bdrv_next(it, &bs)) != NULL) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
ret = bdrv_inactivate_recurse(bs, pass);
if (ret < 0) {
goto out;
@ -3262,8 +3259,7 @@ int bdrv_inactivate_all(void)
}
out:
it = NULL;
while ((it = bdrv_next(it, &bs)) != NULL) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
aio_context_release(bdrv_get_aio_context(bs));
}
@ -3547,11 +3543,10 @@ void bdrv_img_create(const char *filename, const char *fmt,
qstring_from_str(backing_fmt));
}
bs = NULL;
ret = bdrv_open(&bs, full_backing, NULL, backing_options,
back_flags, &local_err);
bs = bdrv_open(full_backing, NULL, backing_options, back_flags,
&local_err);
g_free(full_backing);
if (ret < 0) {
if (!bs) {
goto out;
}
size = bdrv_getlength(bs);
@ -3753,10 +3748,10 @@ bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs,
bool bdrv_is_first_non_filter(BlockDriverState *candidate)
{
BlockDriverState *bs;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
/* walk down the bs forest recursively */
while ((it = bdrv_next(it, &bs)) != NULL) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
bool perm;
/* try to recurse in this top level bs */

71
block/backup.c
View File

@ -36,7 +36,7 @@ typedef struct CowRequest {
typedef struct BackupBlockJob {
BlockJob common;
BlockDriverState *target;
BlockBackend *target;
/* bitmap for sync=incremental */
BdrvDirtyBitmap *sync_bitmap;
MirrorSyncMode sync_mode;
@ -47,6 +47,7 @@ typedef struct BackupBlockJob {
uint64_t sectors_read;
unsigned long *done_bitmap;
int64_t cluster_size;
NotifierWithReturn before_write;
QLIST_HEAD(, CowRequest) inflight_reqs;
} BackupBlockJob;
@ -93,12 +94,12 @@ static void cow_request_end(CowRequest *req)
qemu_co_queue_restart_all(&req->wait_queue);
}
static int coroutine_fn backup_do_cow(BlockDriverState *bs,
static int coroutine_fn backup_do_cow(BackupBlockJob *job,
int64_t sector_num, int nb_sectors,
bool *error_is_read,
bool is_write_notifier)
{
BackupBlockJob *job = (BackupBlockJob *)bs->job;
BlockBackend *blk = job->common.blk;
CowRequest cow_request;
struct iovec iov;
QEMUIOVector bounce_qiov;
@ -131,20 +132,15 @@ static int coroutine_fn backup_do_cow(BlockDriverState *bs,
start * sectors_per_cluster);
if (!bounce_buffer) {
bounce_buffer = qemu_blockalign(bs, job->cluster_size);
bounce_buffer = blk_blockalign(blk, job->cluster_size);
}
iov.iov_base = bounce_buffer;
iov.iov_len = n * BDRV_SECTOR_SIZE;
qemu_iovec_init_external(&bounce_qiov, &iov, 1);
if (is_write_notifier) {
ret = bdrv_co_readv_no_serialising(bs,
start * sectors_per_cluster,
n, &bounce_qiov);
} else {
ret = bdrv_co_readv(bs, start * sectors_per_cluster, n,
&bounce_qiov);
}
ret = blk_co_preadv(blk, start * job->cluster_size,
bounce_qiov.size, &bounce_qiov,
is_write_notifier ? BDRV_REQ_NO_SERIALISING : 0);
if (ret < 0) {
trace_backup_do_cow_read_fail(job, start, ret);
if (error_is_read) {
@ -154,13 +150,11 @@ static int coroutine_fn backup_do_cow(BlockDriverState *bs,
}
if (buffer_is_zero(iov.iov_base, iov.iov_len)) {
ret = bdrv_co_write_zeroes(job->target,
start * sectors_per_cluster,
n, BDRV_REQ_MAY_UNMAP);
ret = blk_co_pwrite_zeroes(job->target, start * job->cluster_size,
bounce_qiov.size, BDRV_REQ_MAY_UNMAP);
} else {
ret = bdrv_co_writev(job->target,
start * sectors_per_cluster, n,
&bounce_qiov);
ret = blk_co_pwritev(job->target, start * job->cluster_size,
bounce_qiov.size, &bounce_qiov, 0);
}
if (ret < 0) {
trace_backup_do_cow_write_fail(job, start, ret);
@ -197,14 +191,16 @@ static int coroutine_fn backup_before_write_notify(
NotifierWithReturn *notifier,
void *opaque)
{
BackupBlockJob *job = container_of(notifier, BackupBlockJob, before_write);
BdrvTrackedRequest *req = opaque;
int64_t sector_num = req->offset >> BDRV_SECTOR_BITS;
int nb_sectors = req->bytes >> BDRV_SECTOR_BITS;
assert(req->bs == blk_bs(job->common.blk));
assert((req->offset & (BDRV_SECTOR_SIZE - 1)) == 0);
assert((req->bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
return backup_do_cow(req->bs, sector_num, nb_sectors, NULL, true);
return backup_do_cow(job, sector_num, nb_sectors, NULL, true);
}
static void backup_set_speed(BlockJob *job, int64_t speed, Error **errp)
@ -221,7 +217,7 @@ static void backup_set_speed(BlockJob *job, int64_t speed, Error **errp)
static void backup_cleanup_sync_bitmap(BackupBlockJob *job, int ret)
{
BdrvDirtyBitmap *bm;
BlockDriverState *bs = job->common.bs;
BlockDriverState *bs = blk_bs(job->common.blk);
if (ret < 0 || block_job_is_cancelled(&job->common)) {
/* Merge the successor back into the parent, delete nothing. */
@ -279,7 +275,7 @@ static void backup_complete(BlockJob *job, void *opaque)
BackupBlockJob *s = container_of(job, BackupBlockJob, common);
BackupCompleteData *data = opaque;
bdrv_unref(s->target);
blk_unref(s->target);
block_job_completed(job, data->ret);
g_free(data);
@ -321,7 +317,6 @@ static int coroutine_fn backup_run_incremental(BackupBlockJob *job)
int64_t end;
int64_t last_cluster = -1;
int64_t sectors_per_cluster = cluster_size_sectors(job);
BlockDriverState *bs = job->common.bs;
HBitmapIter hbi;
granularity = bdrv_dirty_bitmap_granularity(job->sync_bitmap);
@ -343,7 +338,7 @@ static int coroutine_fn backup_run_incremental(BackupBlockJob *job)
if (yield_and_check(job)) {
return ret;
}
ret = backup_do_cow(bs, cluster * sectors_per_cluster,
ret = backup_do_cow(job, cluster * sectors_per_cluster,
sectors_per_cluster, &error_is_read,
false);
if ((ret < 0) &&
@ -376,11 +371,8 @@ static void coroutine_fn backup_run(void *opaque)
{
BackupBlockJob *job = opaque;
BackupCompleteData *data;
BlockDriverState *bs = job->common.bs;
BlockDriverState *target = job->target;
NotifierWithReturn before_write = {
.notify = backup_before_write_notify,
};
BlockDriverState *bs = blk_bs(job->common.blk);
BlockBackend *target = job->target;
int64_t start, end;
int64_t sectors_per_cluster = cluster_size_sectors(job);
int ret = 0;
@ -393,7 +385,8 @@ static void coroutine_fn backup_run(void *opaque)
job->done_bitmap = bitmap_new(end);
bdrv_add_before_write_notifier(bs, &before_write);
job->before_write.notify = backup_before_write_notify;
bdrv_add_before_write_notifier(bs, &job->before_write);
if (job->sync_mode == MIRROR_SYNC_MODE_NONE) {
while (!block_job_is_cancelled(&job->common)) {
@ -445,7 +438,7 @@ static void coroutine_fn backup_run(void *opaque)
}
}
/* FULL sync mode we copy the whole drive. */
ret = backup_do_cow(bs, start * sectors_per_cluster,
ret = backup_do_cow(job, start * sectors_per_cluster,
sectors_per_cluster, &error_is_read, false);
if (ret < 0) {
/* Depending on error action, fail now or retry cluster */
@ -461,14 +454,14 @@ static void coroutine_fn backup_run(void *opaque)
}
}
notifier_with_return_remove(&before_write);
notifier_with_return_remove(&job->before_write);
/* wait until pending backup_do_cow() calls have completed */
qemu_co_rwlock_wrlock(&job->flush_rwlock);
qemu_co_rwlock_unlock(&job->flush_rwlock);
g_free(job->done_bitmap);
bdrv_op_unblock_all(target, job->common.blocker);
bdrv_op_unblock_all(blk_bs(target), job->common.blocker);
data = g_malloc(sizeof(*data));
data->ret = ret;
@ -485,6 +478,7 @@ void backup_start(BlockDriverState *bs, BlockDriverState *target,
{
int64_t len;
BlockDriverInfo bdi;
BackupBlockJob *job = NULL;
int ret;
assert(bs);
@ -542,15 +536,16 @@ void backup_start(BlockDriverState *bs, BlockDriverState *target,
goto error;
}
BackupBlockJob *job = block_job_create(&backup_job_driver, bs, speed,
cb, opaque, errp);
job = block_job_create(&backup_job_driver, bs, speed, cb, opaque, errp);
if (!job) {
goto error;
}
job->target = blk_new();
blk_insert_bs(job->target, target);
job->on_source_error = on_source_error;
job->on_target_error = on_target_error;
job->target = target;
job->sync_mode = sync_mode;
job->sync_bitmap = sync_mode == MIRROR_SYNC_MODE_INCREMENTAL ?
sync_bitmap : NULL;
@ -558,7 +553,7 @@ void backup_start(BlockDriverState *bs, BlockDriverState *target,
/* If there is no backing file on the target, we cannot rely on COW if our
* backup cluster size is smaller than the target cluster size. Even for
* targets with a backing file, try to avoid COW if possible. */
ret = bdrv_get_info(job->target, &bdi);
ret = bdrv_get_info(target, &bdi);
if (ret < 0 && !target->backing) {
error_setg_errno(errp, -ret,
"Couldn't determine the cluster size of the target image, "
@ -584,4 +579,8 @@ void backup_start(BlockDriverState *bs, BlockDriverState *target,
if (sync_bitmap) {
bdrv_reclaim_dirty_bitmap(bs, sync_bitmap, NULL);
}
if (job) {
blk_unref(job->target);
block_job_unref(&job->common);
}
}

123
block/block-backend.c
View File

@ -19,6 +19,7 @@
#include "sysemu/sysemu.h"
#include "qapi-event.h"
#include "qemu/id.h"
#include "trace.h"
/* Number of coroutines to reserve per attached device model */
#define COROUTINE_POOL_RESERVATION 64
@ -119,12 +120,14 @@ static const BdrvChildRole child_root = {
* Store an error through @errp on failure, unless it's null.
* Return the new BlockBackend on success, null on failure.
*/
BlockBackend *blk_new(Error **errp)
BlockBackend *blk_new(void)
{
BlockBackend *blk;
blk = g_new0(BlockBackend, 1);
blk->refcnt = 1;
blk_set_enable_write_cache(blk, true);
qemu_co_queue_init(&blk->public.throttled_reqs[0]);
qemu_co_queue_init(&blk->public.throttled_reqs[1]);
@ -136,27 +139,7 @@ BlockBackend *blk_new(Error **errp)
}
/*
* Create a new BlockBackend with a new BlockDriverState attached.
* Otherwise just like blk_new(), which see.
*/
BlockBackend *blk_new_with_bs(Error **errp)
{
BlockBackend *blk;
BlockDriverState *bs;
blk = blk_new(errp);
if (!blk) {
return NULL;
}
bs = bdrv_new_root();
blk->root = bdrv_root_attach_child(bs, "root", &child_root);
blk->root->opaque = blk;
return blk;
}
/*
* Calls blk_new_with_bs() and then calls bdrv_open() on the BlockDriverState.
* Creates a new BlockBackend, opens a new BlockDriverState, and connects both.
*
* Just as with bdrv_open(), after having called this function the reference to
* @options belongs to the block layer (even on failure).
@ -171,21 +154,16 @@ BlockBackend *blk_new_open(const char *filename, const char *reference,
QDict *options, int flags, Error **errp)
{
BlockBackend *blk;
int ret;
BlockDriverState *bs;
blk = blk_new_with_bs(errp);
if (!blk) {
QDECREF(options);
return NULL;
}
ret = bdrv_open(&blk->root->bs, filename, reference, options, flags, errp);
if (ret < 0) {
blk = blk_new();
bs = bdrv_open(filename, reference, options, flags, errp);
if (!bs) {
blk_unref(blk);
return NULL;
}
blk_set_enable_write_cache(blk, true);
blk->root = bdrv_root_attach_child(bs, "root", &child_root, blk);
return blk;
}
@ -286,25 +264,11 @@ BlockBackend *blk_next(BlockBackend *blk)
: QTAILQ_FIRST(&monitor_block_backends);
}
struct BdrvNextIterator {
enum {
BDRV_NEXT_BACKEND_ROOTS,
BDRV_NEXT_MONITOR_OWNED,
} phase;
BlockBackend *blk;
BlockDriverState *bs;
};
/* 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)
BlockDriverState *bdrv_next(BdrvNextIterator *it)
{
if (!it) {
it = g_new(BdrvNextIterator, 1);
*it = (BdrvNextIterator) {
.phase = BDRV_NEXT_BACKEND_ROOTS,
};
}
BlockDriverState *bs;
/* 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
@ -312,11 +276,11 @@ BdrvNextIterator *bdrv_next(BdrvNextIterator *it, BlockDriverState **bs)
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));
bs = it->blk ? blk_bs(it->blk) : NULL;
} while (it->blk && (bs == NULL || bdrv_first_blk(bs) != it->blk));
if (*bs) {
return it;
if (bs) {
return bs;
}
it->phase = BDRV_NEXT_MONITOR_OWNED;
}
@ -326,10 +290,19 @@ BdrvNextIterator *bdrv_next(BdrvNextIterator *it, BlockDriverState **bs)
* by the above block already */
do {
it->bs = bdrv_next_monitor_owned(it->bs);
*bs = it->bs;
} while (*bs && bdrv_has_blk(*bs));
bs = it->bs;
} while (bs && bdrv_has_blk(bs));
return *bs ? it : NULL;
return bs;
}
BlockDriverState *bdrv_first(BdrvNextIterator *it)
{
*it = (BdrvNextIterator) {
.phase = BDRV_NEXT_BACKEND_ROOTS,
};
return bdrv_next(it);
}
/*
@ -509,8 +482,7 @@ void blk_remove_bs(BlockBackend *blk)
void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs)
{
bdrv_ref(bs);
blk->root = bdrv_root_attach_child(bs, "root", &child_root);
blk->root->opaque = blk;
blk->root = bdrv_root_attach_child(bs, "root", &child_root, blk);
notifier_list_notify(&blk->insert_bs_notifiers, blk);
if (blk->public.throttle_state) {
@ -770,11 +742,15 @@ static int blk_check_request(BlockBackend *blk, int64_t sector_num,
nb_sectors * BDRV_SECTOR_SIZE);
}
static int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
int ret = blk_check_byte_request(blk, offset, bytes);
int ret;
trace_blk_co_preadv(blk, blk_bs(blk), offset, bytes, flags);
ret = blk_check_byte_request(blk, offset, bytes);
if (ret < 0) {
return ret;
}
@ -787,12 +763,14 @@ static int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
return bdrv_co_preadv(blk_bs(blk), offset, bytes, qiov, flags);
}
static int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset,
unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset,
unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
int ret;
trace_blk_co_pwritev(blk, blk_bs(blk), offset, bytes, flags);
ret = blk_check_byte_request(blk, offset, bytes);
if (ret < 0) {
return ret;
@ -885,8 +863,8 @@ int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,
return ret;
}
int blk_write_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags)
int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags)
{
return blk_prw(blk, offset, NULL, count, blk_write_entry,
flags | BDRV_REQ_ZERO_WRITE);
@ -1001,9 +979,9 @@ static void blk_aio_write_entry(void *opaque)
blk_aio_complete(acb);
}
BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque)
BlockAIOCB *blk_aio_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque)
{
return blk_aio_prwv(blk, offset, count, NULL, blk_aio_write_entry,
flags | BDRV_REQ_ZERO_WRITE, cb, opaque);
@ -1492,8 +1470,8 @@ void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
return qemu_aio_get(aiocb_info, blk_bs(blk), cb, opaque);
}
int coroutine_fn blk_co_write_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags)
int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags)
{
return blk_co_pwritev(blk, offset, count, NULL,
flags | BDRV_REQ_ZERO_WRITE);
@ -1704,6 +1682,9 @@ static void blk_root_drained_begin(BdrvChild *child)
{
BlockBackend *blk = child->opaque;
/* Note that blk->root may not be accessible here yet if we are just
* attaching to a BlockDriverState that is drained. Use child instead. */
if (blk->public.io_limits_disabled++ == 0) {
throttle_group_restart_blk(blk);
}

53
block/commit.c
View File

@ -36,28 +36,36 @@ typedef struct CommitBlockJob {
BlockJob common;
RateLimit limit;
BlockDriverState *active;
BlockDriverState *top;
BlockDriverState *base;
BlockBackend *top;
BlockBackend *base;
BlockdevOnError on_error;
int base_flags;
int orig_overlay_flags;
char *backing_file_str;
} CommitBlockJob;
static int coroutine_fn commit_populate(BlockDriverState *bs,
BlockDriverState *base,
static int coroutine_fn commit_populate(BlockBackend *bs, BlockBackend *base,
int64_t sector_num, int nb_sectors,
void *buf)
{
int ret = 0;
QEMUIOVector qiov;
struct iovec iov = {
.iov_base = buf,
.iov_len = nb_sectors * BDRV_SECTOR_SIZE,
};
ret = bdrv_read(bs, sector_num, buf, nb_sectors);
if (ret) {
qemu_iovec_init_external(&qiov, &iov, 1);
ret = blk_co_preadv(bs, sector_num * BDRV_SECTOR_SIZE,
qiov.size, &qiov, 0);
if (ret < 0) {
return ret;
}
ret = bdrv_write(base, sector_num, buf, nb_sectors);
if (ret) {
ret = blk_co_pwritev(base, sector_num * BDRV_SECTOR_SIZE,
qiov.size, &qiov, 0);
if (ret < 0) {
return ret;
}
@ -73,8 +81,8 @@ static void commit_complete(BlockJob *job, void *opaque)
CommitBlockJob *s = container_of(job, CommitBlockJob, common);
CommitCompleteData *data = opaque;
BlockDriverState *active = s->active;
BlockDriverState *top = s->top;
BlockDriverState *base = s->base;
BlockDriverState *top = blk_bs(s->top);
BlockDriverState *base = blk_bs(s->base);
BlockDriverState *overlay_bs;
int ret = data->ret;
@ -94,6 +102,8 @@ static void commit_complete(BlockJob *job, void *opaque)
bdrv_reopen(overlay_bs, s->orig_overlay_flags, NULL);
}
g_free(s->backing_file_str);
blk_unref(s->top);
blk_unref(s->base);
block_job_completed(&s->common, ret);
g_free(data);
}
@ -102,8 +112,6 @@ static void coroutine_fn commit_run(void *opaque)
{
CommitBlockJob *s = opaque;
CommitCompleteData *data;
BlockDriverState *top = s->top;
BlockDriverState *base = s->base;
int64_t sector_num, end;
int ret = 0;
int n = 0;
@ -111,27 +119,27 @@ static void coroutine_fn commit_run(void *opaque)
int bytes_written = 0;
int64_t base_len;
ret = s->common.len = bdrv_getlength(top);
ret = s->common.len = blk_getlength(s->top);
if (s->common.len < 0) {
goto out;
}
ret = base_len = bdrv_getlength(base);
ret = base_len = blk_getlength(s->base);
if (base_len < 0) {
goto out;
}
if (base_len < s->common.len) {
ret = bdrv_truncate(base, s->common.len);
ret = blk_truncate(s->base, s->common.len);
if (ret) {
goto out;
}
}
end = s->common.len >> BDRV_SECTOR_BITS;
buf = qemu_blockalign(top, COMMIT_BUFFER_SIZE);
buf = blk_blockalign(s->top, COMMIT_BUFFER_SIZE);
for (sector_num = 0; sector_num < end; sector_num += n) {
uint64_t delay_ns = 0;
@ -146,7 +154,8 @@ wait:
break;
}
/* Copy if allocated above the base */
ret = bdrv_is_allocated_above(top, base, sector_num,
ret = bdrv_is_allocated_above(blk_bs(s->top), blk_bs(s->base),
sector_num,
COMMIT_BUFFER_SIZE / BDRV_SECTOR_SIZE,
&n);
copy = (ret == 1);
@ -158,7 +167,7 @@ wait:
goto wait;
}
}
ret = commit_populate(top, base, sector_num, n, buf);
ret = commit_populate(s->top, s->base, sector_num, n, buf);
bytes_written += n * BDRV_SECTOR_SIZE;
}
if (ret < 0) {
@ -253,8 +262,12 @@ void commit_start(BlockDriverState *bs, BlockDriverState *base,
return;
}
s->base = base;
s->top = top;
s->base = blk_new();
blk_insert_bs(s->base, base);
s->top = blk_new();
blk_insert_bs(s->top, top);
s->active = bs;
s->base_flags = orig_base_flags;

97
block/io.c
View File

@ -225,6 +225,34 @@ static void coroutine_fn bdrv_co_yield_to_drain(BlockDriverState *bs)
assert(data.done);
}
void bdrv_drained_begin(BlockDriverState *bs)
{
if (!bs->quiesce_counter++) {
aio_disable_external(bdrv_get_aio_context(bs));
bdrv_parent_drained_begin(bs);
}
bdrv_io_unplugged_begin(bs);
bdrv_drain_recurse(bs);
if (qemu_in_coroutine()) {
bdrv_co_yield_to_drain(bs);
} else {
bdrv_drain_poll(bs);
}
bdrv_io_unplugged_end(bs);
}
void bdrv_drained_end(BlockDriverState *bs)
{
assert(bs->quiesce_counter > 0);
if (--bs->quiesce_counter > 0) {
return;
}
bdrv_parent_drained_end(bs);
aio_enable_external(bdrv_get_aio_context(bs));
}
/*
* Wait for pending requests to complete on a single BlockDriverState subtree,
* and suspend block driver's internal I/O until next request arrives.
@ -238,26 +266,15 @@ static void coroutine_fn bdrv_co_yield_to_drain(BlockDriverState *bs)
*/
void coroutine_fn bdrv_co_drain(BlockDriverState *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_parent_drained_end(bs);
assert(qemu_in_coroutine());
bdrv_drained_begin(bs);
bdrv_drained_end(bs);
}
void bdrv_drain(BlockDriverState *bs)
{
bdrv_parent_drained_begin(bs);
bdrv_io_unplugged_begin(bs);
bdrv_drain_recurse(bs);
if (qemu_in_coroutine()) {
bdrv_co_yield_to_drain(bs);
} else {
bdrv_drain_poll(bs);
}
bdrv_io_unplugged_end(bs);
bdrv_parent_drained_end(bs);
bdrv_drained_begin(bs);
bdrv_drained_end(bs);
}
/*
@ -271,10 +288,10 @@ void bdrv_drain_all(void)
/* Always run first iteration so any pending completion BHs run */
bool busy = true;
BlockDriverState *bs;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
GSList *aio_ctxs = NULL, *ctx;
while ((it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
@ -302,10 +319,9 @@ void bdrv_drain_all(void)
for (ctx = aio_ctxs; ctx != NULL; ctx = ctx->next) {
AioContext *aio_context = ctx->data;
it = NULL;
aio_context_acquire(aio_context);
while ((it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
if (aio_context == bdrv_get_aio_context(bs)) {
if (bdrv_requests_pending(bs)) {
busy = true;
@ -318,8 +334,7 @@ void bdrv_drain_all(void)
}
}
it = NULL;
while ((it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
@ -1093,24 +1108,6 @@ int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num,
return bdrv_co_do_readv(bs, sector_num, nb_sectors, qiov, 0);
}
int coroutine_fn bdrv_co_readv_no_serialising(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov)
{
trace_bdrv_co_readv_no_serialising(bs, sector_num, nb_sectors);
return bdrv_co_do_readv(bs, sector_num, nb_sectors, qiov,
BDRV_REQ_NO_SERIALISING);
}
int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov)
{
trace_bdrv_co_copy_on_readv(bs, sector_num, nb_sectors);
return bdrv_co_do_readv(bs, sector_num, nb_sectors, qiov,
BDRV_REQ_COPY_ON_READ);
}
#define MAX_WRITE_ZEROES_BOUNCE_BUFFER 32768
static int coroutine_fn bdrv_co_do_write_zeroes(BlockDriverState *bs,
@ -2543,23 +2540,3 @@ void bdrv_io_unplugged_end(BlockDriverState *bs)
}
}
}
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;
}
aio_enable_external(bdrv_get_aio_context(bs));
}

100
block/mirror.c
View File

@ -20,7 +20,6 @@
#include "qapi/qmp/qerror.h"
#include "qemu/ratelimit.h"
#include "qemu/bitmap.h"
#include "qemu/error-report.h"
#define SLICE_TIME 100000000ULL /* ns */
#define MAX_IN_FLIGHT 16
@ -36,7 +35,7 @@ typedef struct MirrorBuffer {
typedef struct MirrorBlockJob {
BlockJob common;
RateLimit limit;
BlockDriverState *target;
BlockBackend *target;
BlockDriverState *base;
/* The name of the graph node to replace */
char *replaces;
@ -157,7 +156,8 @@ static void mirror_read_complete(void *opaque, int ret)
mirror_iteration_done(op, ret);
return;
}
bdrv_aio_writev(s->target, op->sector_num, &op->qiov, op->nb_sectors,
blk_aio_pwritev(s->target, op->sector_num * BDRV_SECTOR_SIZE, &op->qiov,
op->nb_sectors * BDRV_SECTOR_SIZE,
mirror_write_complete, op);
}
@ -186,7 +186,7 @@ static int mirror_cow_align(MirrorBlockJob *s,
need_cow |= !test_bit((*sector_num + *nb_sectors - 1) / chunk_sectors,
s->cow_bitmap);
if (need_cow) {
bdrv_round_to_clusters(s->target, *sector_num, *nb_sectors,
bdrv_round_to_clusters(blk_bs(s->target), *sector_num, *nb_sectors,
&align_sector_num, &align_nb_sectors);
}
@ -224,7 +224,7 @@ static inline void mirror_wait_for_io(MirrorBlockJob *s)
static int mirror_do_read(MirrorBlockJob *s, int64_t sector_num,
int nb_sectors)
{
BlockDriverState *source = s->common.bs;
BlockBackend *source = s->common.blk;
int sectors_per_chunk, nb_chunks;
int ret = nb_sectors;
MirrorOp *op;
@ -274,7 +274,8 @@ static int mirror_do_read(MirrorBlockJob *s, int64_t sector_num,
s->sectors_in_flight += nb_sectors;
trace_mirror_one_iteration(s, sector_num, nb_sectors);
bdrv_aio_readv(source, sector_num, &op->qiov, nb_sectors,
blk_aio_preadv(source, sector_num * BDRV_SECTOR_SIZE, &op->qiov,
nb_sectors * BDRV_SECTOR_SIZE,
mirror_read_complete, op);
return ret;
}
@ -296,10 +297,11 @@ static void mirror_do_zero_or_discard(MirrorBlockJob *s,
s->in_flight++;
s->sectors_in_flight += nb_sectors;
if (is_discard) {
bdrv_aio_discard(s->target, sector_num, op->nb_sectors,
mirror_write_complete, op);
blk_aio_discard(s->target, sector_num, op->nb_sectors,
mirror_write_complete, op);
} else {
bdrv_aio_write_zeroes(s->target, sector_num, op->nb_sectors,
blk_aio_pwrite_zeroes(s->target, sector_num * BDRV_SECTOR_SIZE,
op->nb_sectors * BDRV_SECTOR_SIZE,
s->unmap ? BDRV_REQ_MAY_UNMAP : 0,
mirror_write_complete, op);
}
@ -307,7 +309,7 @@ static void mirror_do_zero_or_discard(MirrorBlockJob *s,
static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s)
{
BlockDriverState *source = s->common.bs;
BlockDriverState *source = blk_bs(s->common.blk);
int64_t sector_num, first_chunk;
uint64_t delay_ns = 0;
/* At least the first dirty chunk is mirrored in one iteration. */
@ -384,7 +386,7 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s)
} else if (ret >= 0 && !(ret & BDRV_BLOCK_DATA)) {
int64_t target_sector_num;
int target_nb_sectors;
bdrv_round_to_clusters(s->target, sector_num, io_sectors,
bdrv_round_to_clusters(blk_bs(s->target), sector_num, io_sectors,
&target_sector_num, &target_nb_sectors);
if (target_sector_num == sector_num &&
target_nb_sectors == io_sectors) {
@ -449,7 +451,8 @@ static void mirror_exit(BlockJob *job, void *opaque)
MirrorBlockJob *s = container_of(job, MirrorBlockJob, common);
MirrorExitData *data = opaque;
AioContext *replace_aio_context = NULL;
BlockDriverState *src = s->common.bs;
BlockDriverState *src = blk_bs(s->common.blk);
BlockDriverState *target_bs = blk_bs(s->target);
/* Make sure that the source BDS doesn't go away before we called
* block_job_completed(). */
@ -461,26 +464,25 @@ static void mirror_exit(BlockJob *job, void *opaque)
}
if (s->should_complete && data->ret == 0) {
BlockDriverState *to_replace = s->common.bs;
BlockDriverState *to_replace = src;
if (s->to_replace) {
to_replace = s->to_replace;
}
/* This was checked in mirror_start_job(), but meanwhile one of the
* nodes could have been newly attached to a BlockBackend. */
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;
if (bdrv_get_flags(target_bs) != bdrv_get_flags(to_replace)) {
bdrv_reopen(target_bs, bdrv_get_flags(to_replace), NULL);
}
if (bdrv_get_flags(s->target) != bdrv_get_flags(to_replace)) {
bdrv_reopen(s->target, bdrv_get_flags(to_replace), NULL);
}
bdrv_replace_in_backing_chain(to_replace, s->target);
/* The mirror job has no requests in flight any more, but we need to
* drain potential other users of the BDS before changing the graph. */
bdrv_drained_begin(target_bs);
bdrv_replace_in_backing_chain(to_replace, target_bs);
bdrv_drained_end(target_bs);
/* We just changed the BDS the job BB refers to */
blk_remove_bs(job->blk);
blk_insert_bs(job->blk, src);
}
out:
if (s->to_replace) {
bdrv_op_unblock_all(s->to_replace, s->replace_blocker);
error_free(s->replace_blocker);
@ -490,8 +492,8 @@ out:
aio_context_release(replace_aio_context);
}
g_free(s->replaces);
bdrv_op_unblock_all(s->target, s->common.blocker);
bdrv_unref(s->target);
bdrv_op_unblock_all(target_bs, s->common.blocker);
blk_unref(s->target);
block_job_completed(&s->common, data->ret);
g_free(data);
bdrv_drained_end(src);
@ -505,7 +507,8 @@ static void coroutine_fn mirror_run(void *opaque)
{
MirrorBlockJob *s = opaque;
MirrorExitData *data;
BlockDriverState *bs = s->common.bs;
BlockDriverState *bs = blk_bs(s->common.blk);
BlockDriverState *target_bs = blk_bs(s->target);
int64_t sector_num, end, length;
uint64_t last_pause_ns;
BlockDriverInfo bdi;
@ -541,18 +544,18 @@ static void coroutine_fn mirror_run(void *opaque)
* the destination do COW. Instead, we copy sectors around the
* dirty data if needed. We need a bitmap to do that.
*/
bdrv_get_backing_filename(s->target, backing_filename,
bdrv_get_backing_filename(target_bs, backing_filename,
sizeof(backing_filename));
if (!bdrv_get_info(s->target, &bdi) && bdi.cluster_size) {
if (!bdrv_get_info(target_bs, &bdi) && bdi.cluster_size) {
target_cluster_size = bdi.cluster_size;
}
if (backing_filename[0] && !s->target->backing
if (backing_filename[0] && !target_bs->backing
&& s->granularity < target_cluster_size) {
s->buf_size = MAX(s->buf_size, target_cluster_size);
s->cow_bitmap = bitmap_new(length);
}
s->target_cluster_sectors = target_cluster_size >> BDRV_SECTOR_BITS;
s->max_iov = MIN(s->common.bs->bl.max_iov, s->target->bl.max_iov);
s->max_iov = MIN(bs->bl.max_iov, target_bs->bl.max_iov);
end = s->bdev_length / BDRV_SECTOR_SIZE;
s->buf = qemu_try_blockalign(bs, s->buf_size);
@ -567,7 +570,7 @@ static void coroutine_fn mirror_run(void *opaque)
if (!s->is_none_mode) {
/* First part, loop on the sectors and initialize the dirty bitmap. */
BlockDriverState *base = s->base;
bool mark_all_dirty = s->base == NULL && !bdrv_has_zero_init(s->target);
bool mark_all_dirty = s->base == NULL && !bdrv_has_zero_init(target_bs);
for (sector_num = 0; sector_num < end; ) {
/* Just to make sure we are not exceeding int limit. */
@ -637,7 +640,7 @@ static void coroutine_fn mirror_run(void *opaque)
should_complete = false;
if (s->in_flight == 0 && cnt == 0) {
trace_mirror_before_flush(s);
ret = bdrv_flush(s->target);
ret = blk_flush(s->target);
if (ret < 0) {
if (mirror_error_action(s, false, -ret) ==
BLOCK_ERROR_ACTION_REPORT) {
@ -715,7 +718,7 @@ immediate_exit:
data->ret = ret;
/* Before we switch to target in mirror_exit, make sure data doesn't
* change. */
bdrv_drained_begin(s->common.bs);
bdrv_drained_begin(bs);
if (qemu_get_aio_context() == bdrv_get_aio_context(bs)) {
/* FIXME: virtio host notifiers run on iohandler_ctx, therefore the
* above bdrv_drained_end isn't enough to quiesce it. This is ugly, we
@ -742,7 +745,8 @@ static void mirror_complete(BlockJob *job, Error **errp)
Error *local_err = NULL;
int ret;
ret = bdrv_open_backing_file(s->target, NULL, "backing", &local_err);
ret = bdrv_open_backing_file(blk_bs(s->target), NULL, "backing",
&local_err);
if (ret < 0) {
error_propagate(errp, local_err);
return;
@ -804,7 +808,6 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target,
bool is_none_mode, BlockDriverState *base)
{
MirrorBlockJob *s;
BlockDriverState *replaced_bs;
if (granularity == 0) {
granularity = bdrv_get_default_bitmap_granularity(target);
@ -821,30 +824,17 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target,
buf_size = DEFAULT_MIRROR_BUF_SIZE;
}
/* We can't support this case as long as the block layer can't handle
* multiple BlockBackends per BlockDriverState. */
if (replaces) {
replaced_bs = bdrv_lookup_bs(replaces, replaces, errp);
if (replaced_bs == NULL) {
return;
}
} else {
replaced_bs = bs;
}
if (bdrv_has_blk(replaced_bs) && bdrv_has_blk(target)) {
error_setg(errp, "Can't create node with two BlockBackends");
return;
}
s = block_job_create(driver, bs, speed, cb, opaque, errp);
if (!s) {
return;
}
s->target = blk_new();
blk_insert_bs(s->target, target);
s->replaces = g_strdup(replaces);
s->on_source_error = on_source_error;
s->on_target_error = on_target_error;
s->target = target;
s->is_none_mode = is_none_mode;
s->base = base;
s->granularity = granularity;
@ -854,11 +844,12 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target,
s->dirty_bitmap = bdrv_create_dirty_bitmap(bs, granularity, NULL, errp);
if (!s->dirty_bitmap) {
g_free(s->replaces);
blk_unref(s->target);
block_job_unref(&s->common);
return;
}
bdrv_op_block_all(s->target, s->common.blocker);
bdrv_op_block_all(target, s->common.blocker);
s->common.co = qemu_coroutine_create(mirror_run);
trace_mirror_start(bs, s, s->common.co, opaque);
@ -931,7 +922,6 @@ void commit_active_start(BlockDriverState *bs, BlockDriverState *base,
}
}
bdrv_ref(base);
mirror_start_job(bs, base, NULL, speed, 0, 0,
on_error, on_error, false, cb, opaque, &local_err,
&commit_active_job_driver, false, base);

4
block/parallels.c
View File

@ -517,8 +517,8 @@ static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
if (ret < 0) {
goto exit;
}
ret = blk_write_zeroes(file, BDRV_SECTOR_SIZE,
(bat_sectors - 1) << BDRV_SECTOR_BITS, 0);
ret = blk_pwrite_zeroes(file, BDRV_SECTOR_SIZE,
(bat_sectors - 1) << BDRV_SECTOR_BITS, 0);
if (ret < 0) {
goto exit;
}

55
block/snapshot.c
View File

@ -374,9 +374,9 @@ bool bdrv_all_can_snapshot(BlockDriverState **first_bad_bs)
{
bool ok = true;
BlockDriverState *bs;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
while (ok && (it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
@ -384,8 +384,12 @@ bool bdrv_all_can_snapshot(BlockDriverState **first_bad_bs)
ok = bdrv_can_snapshot(bs);
}
aio_context_release(ctx);
if (!ok) {
goto fail;
}
}
fail:
*first_bad_bs = bs;
return ok;
}
@ -395,20 +399,27 @@ int bdrv_all_delete_snapshot(const char *name, BlockDriverState **first_bad_bs,
{
int ret = 0;
BlockDriverState *bs;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
QEMUSnapshotInfo sn1, *snapshot = &sn1;
while (ret == 0 && (it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
if (bdrv_can_snapshot(bs) &&
bdrv_snapshot_find(bs, snapshot, name) >= 0) {
ret = bdrv_snapshot_delete_by_id_or_name(bs, name, err);
if (ret < 0) {
goto fail;
}
}
aio_context_release(ctx);
if (ret < 0) {
goto fail;
}
}
fail:
*first_bad_bs = bs;
return ret;
}
@ -418,9 +429,9 @@ int bdrv_all_goto_snapshot(const char *name, BlockDriverState **first_bad_bs)
{
int err = 0;
BlockDriverState *bs;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
while (err == 0 && (it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
@ -428,8 +439,12 @@ int bdrv_all_goto_snapshot(const char *name, BlockDriverState **first_bad_bs)
err = bdrv_snapshot_goto(bs, name);
}
aio_context_release(ctx);
if (err < 0) {
goto fail;
}
}
fail:
*first_bad_bs = bs;
return err;
}
@ -439,9 +454,9 @@ int bdrv_all_find_snapshot(const char *name, BlockDriverState **first_bad_bs)
QEMUSnapshotInfo sn;
int err = 0;
BlockDriverState *bs;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
while (err == 0 && (it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
@ -449,8 +464,12 @@ int bdrv_all_find_snapshot(const char *name, BlockDriverState **first_bad_bs)
err = bdrv_snapshot_find(bs, &sn, name);
}
aio_context_release(ctx);
if (err < 0) {
goto fail;
}
}
fail:
*first_bad_bs = bs;
return err;
}
@ -462,9 +481,9 @@ int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn,
{
int err = 0;
BlockDriverState *bs;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
while (err == 0 && (it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *ctx = bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
@ -476,24 +495,32 @@ int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn,
err = bdrv_snapshot_create(bs, sn);
}
aio_context_release(ctx);
if (err < 0) {
goto fail;
}
}
fail:
*first_bad_bs = bs;
return err;
}
BlockDriverState *bdrv_all_find_vmstate_bs(void)
{
bool not_found = true;
BlockDriverState *bs;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
while (not_found && (it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *ctx = bdrv_get_aio_context(bs);
bool found;
aio_context_acquire(ctx);
not_found = !bdrv_can_snapshot(bs);
found = bdrv_can_snapshot(bs);
aio_context_release(ctx);
if (found) {
break;
}
}
return bs;
}

15
block/stream.c
View File

@ -39,7 +39,7 @@ typedef struct StreamBlockJob {
char *backing_file_str;
} StreamBlockJob;
static int coroutine_fn stream_populate(BlockDriverState *bs,
static int coroutine_fn stream_populate(BlockBackend *blk,
int64_t sector_num, int nb_sectors,
void *buf)
{
@ -52,7 +52,8 @@ static int coroutine_fn stream_populate(BlockDriverState *bs,
qemu_iovec_init_external(&qiov, &iov, 1);
/* Copy-on-read the unallocated clusters */
return bdrv_co_copy_on_readv(bs, sector_num, nb_sectors, &qiov);
return blk_co_preadv(blk, sector_num * BDRV_SECTOR_SIZE, qiov.size, &qiov,
BDRV_REQ_COPY_ON_READ);
}
typedef struct {
@ -64,6 +65,7 @@ static void stream_complete(BlockJob *job, void *opaque)
{
StreamBlockJob *s = container_of(job, StreamBlockJob, common);
StreamCompleteData *data = opaque;
BlockDriverState *bs = blk_bs(job->blk);
BlockDriverState *base = s->base;
if (!block_job_is_cancelled(&s->common) && data->reached_end &&
@ -75,8 +77,8 @@ static void stream_complete(BlockJob *job, void *opaque)
base_fmt = base->drv->format_name;
}
}
data->ret = bdrv_change_backing_file(job->bs, base_id, base_fmt);
bdrv_set_backing_hd(job->bs, base);
data->ret = bdrv_change_backing_file(bs, base_id, base_fmt);
bdrv_set_backing_hd(bs, base);
}
g_free(s->backing_file_str);
@ -88,7 +90,8 @@ static void coroutine_fn stream_run(void *opaque)
{
StreamBlockJob *s = opaque;
StreamCompleteData *data;
BlockDriverState *bs = s->common.bs;
BlockBackend *blk = s->common.blk;
BlockDriverState *bs = blk_bs(blk);
BlockDriverState *base = s->base;
int64_t sector_num = 0;
int64_t end = -1;
@ -159,7 +162,7 @@ wait:
goto wait;
}
}
ret = stream_populate(bs, sector_num, n, buf);
ret = stream_populate(blk, sector_num, n, buf);
}
if (ret < 0) {
BlockErrorAction action =

8
block/vvfat.c
View File

@ -2998,12 +2998,12 @@ static int enable_write_target(BDRVVVFATState *s, Error **errp)
goto err;
}
s->qcow = NULL;
options = qdict_new();
qdict_put(options, "driver", qstring_from_str("qcow"));
ret = bdrv_open(&s->qcow, s->qcow_filename, NULL, options,
BDRV_O_RDWR | BDRV_O_NO_FLUSH, errp);
if (ret < 0) {
s->qcow = bdrv_open(s->qcow_filename, NULL, options,
BDRV_O_RDWR | BDRV_O_NO_FLUSH, errp);
if (!s->qcow) {
ret = -EINVAL;
goto err;
}

60
blockdev.c
View File

@ -567,11 +567,7 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
if ((!file || !*file) && !qdict_size(bs_opts)) {
BlockBackendRootState *blk_rs;
blk = blk_new(errp);
if (!blk) {
goto early_err;
}
blk = blk_new();
blk_rs = blk_get_root_state(blk);
blk_rs->open_flags = bdrv_flags;
blk_rs->read_only = !(bdrv_flags & BDRV_O_RDWR);
@ -657,7 +653,6 @@ static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
QemuOpts *opts;
Error *local_error = NULL;
BlockdevDetectZeroesOptions detect_zeroes;
int ret;
int bdrv_flags = 0;
opts = qemu_opts_create(&qemu_root_bds_opts, NULL, 1, errp);
@ -688,9 +683,8 @@ static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
bdrv_flags |= BDRV_O_INACTIVE;
}
bs = NULL;
ret = bdrv_open(&bs, NULL, NULL, bs_opts, bdrv_flags, errp);
if (ret < 0) {
bs = bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp);
if (!bs) {
goto fail_no_bs_opts;
}
@ -1643,7 +1637,7 @@ typedef struct ExternalSnapshotState {
static void external_snapshot_prepare(BlkActionState *common,
Error **errp)
{
int flags = 0, ret;
int flags = 0;
QDict *options = NULL;
Error *local_err = NULL;
/* Device and node name of the image to generate the snapshot from */
@ -1768,11 +1762,10 @@ static void external_snapshot_prepare(BlkActionState *common,
flags |= BDRV_O_NO_BACKING;
}
assert(state->new_bs == NULL);
ret = bdrv_open(&state->new_bs, new_image_file, snapshot_ref, options,
flags, errp);
state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags,
errp);
/* We will manually add the backing_hd field to the bs later */
if (ret != 0) {
if (!state->new_bs) {
return;
}
@ -2540,7 +2533,7 @@ void qmp_blockdev_change_medium(const char *device, const char *filename,
{
BlockBackend *blk;
BlockDriverState *medium_bs = NULL;
int bdrv_flags, ret;
int bdrv_flags;
QDict *options = NULL;
Error *err = NULL;
@ -2584,9 +2577,8 @@ void qmp_blockdev_change_medium(const char *device, const char *filename,
qdict_put(options, "driver", qstring_from_str(format));
}
assert(!medium_bs);
ret = bdrv_open(&medium_bs, filename, NULL, options, bdrv_flags, errp);
if (ret < 0) {
medium_bs = bdrv_open(filename, NULL, options, bdrv_flags, errp);
if (!medium_bs) {
goto fail;
}
@ -3199,7 +3191,6 @@ static void do_drive_backup(const char *device, const char *target,
Error *local_err = NULL;
int flags;
int64_t size;
int ret;
if (!has_speed) {
speed = 0;
@ -3283,10 +3274,8 @@ static void do_drive_backup(const char *device, const char *target,
qdict_put(options, "driver", qstring_from_str(format));
}
target_bs = NULL;
ret = bdrv_open(&target_bs, target, NULL, options, flags, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
target_bs = bdrv_open(target, NULL, options, flags, errp);
if (!target_bs) {
goto out;
}
@ -3304,8 +3293,8 @@ static void do_drive_backup(const char *device, const char *target,
backup_start(bs, target_bs, speed, sync, bmap,
on_source_error, on_target_error,
block_job_cb, bs, txn, &local_err);
bdrv_unref(target_bs);
if (local_err != NULL) {
bdrv_unref(target_bs);
error_propagate(errp, local_err);
goto out;
}
@ -3389,12 +3378,10 @@ void do_blockdev_backup(const char *device, const char *target,
}
target_bs = blk_bs(target_blk);
bdrv_ref(target_bs);
bdrv_set_aio_context(target_bs, aio_context);
backup_start(bs, target_bs, speed, sync, NULL, on_source_error,
on_target_error, block_job_cb, bs, txn, &local_err);
if (local_err != NULL) {
bdrv_unref(target_bs);
error_propagate(errp, local_err);
}
out:
@ -3470,10 +3457,6 @@ static void blockdev_mirror_common(BlockDriverState *bs,
if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
return;
}
if (bdrv_has_blk(target)) {
error_setg(errp, "Cannot mirror to an attached block device");
return;
}
if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) {
sync = MIRROR_SYNC_MODE_FULL;
@ -3511,7 +3494,6 @@ void qmp_drive_mirror(const char *device, const char *target,
QDict *options = NULL;
int flags;
int64_t size;
int ret;
blk = blk_by_name(device);
if (!blk) {
@ -3620,11 +3602,9 @@ void qmp_drive_mirror(const char *device, const char *target,
/* Mirroring takes care of copy-on-write using the source's backing
* file.
*/
target_bs = NULL;
ret = bdrv_open(&target_bs, target, NULL, options,
flags | BDRV_O_NO_BACKING, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
target_bs = bdrv_open(target, NULL, options, flags | BDRV_O_NO_BACKING,
errp);
if (!target_bs) {
goto out;
}
@ -3639,9 +3619,9 @@ void qmp_drive_mirror(const char *device, const char *target,
has_on_target_error, on_target_error,
has_unmap, unmap,
&local_err);
bdrv_unref(target_bs);
if (local_err) {
error_propagate(errp, local_err);
bdrv_unref(target_bs);
}
out:
aio_context_release(aio_context);
@ -3685,7 +3665,6 @@ void qmp_blockdev_mirror(const char *device, const char *target,
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
bdrv_ref(target_bs);
bdrv_set_aio_context(target_bs, aio_context);
blockdev_mirror_common(bs, target_bs,
@ -3699,7 +3678,6 @@ void qmp_blockdev_mirror(const char *device, const char *target,
&local_err);
if (local_err) {
error_propagate(errp, local_err);
bdrv_unref(target_bs);
}
aio_context_release(aio_context);
@ -4164,9 +4142,9 @@ BlockJobInfoList *qmp_query_block_jobs(Error **errp)
{
BlockJobInfoList *head = NULL, **p_next = &head;
BlockDriverState *bs;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
while ((it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);

62
blockjob.c
View File

@ -50,17 +50,31 @@ struct BlockJobTxn {
int refcnt;
};
static QLIST_HEAD(, BlockJob) block_jobs = QLIST_HEAD_INITIALIZER(block_jobs);
BlockJob *block_job_next(BlockJob *job)
{
if (!job) {
return QLIST_FIRST(&block_jobs);
}
return QLIST_NEXT(job, job_list);
}
void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs,
int64_t speed, BlockCompletionFunc *cb,
void *opaque, Error **errp)
{
BlockBackend *blk;
BlockJob *job;
if (bs->job) {
error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
return NULL;
}
bdrv_ref(bs);
blk = blk_new();
blk_insert_bs(blk, bs);
job = g_malloc0(driver->instance_size);
error_setg(&job->blocker, "block device is in use by block job: %s",
BlockJobType_lookup[driver->job_type]);
@ -69,13 +83,15 @@ void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs,
job->driver = driver;
job->id = g_strdup(bdrv_get_device_name(bs));
job->bs = bs;
job->blk = blk;
job->cb = cb;
job->opaque = opaque;
job->busy = true;
job->refcnt = 1;
bs->job = job;
QLIST_INSERT_HEAD(&block_jobs, job, job_list);
/* Only set speed when necessary to avoid NotSupported error */
if (speed != 0) {
Error *local_err = NULL;
@ -98,11 +114,13 @@ void block_job_ref(BlockJob *job)
void block_job_unref(BlockJob *job)
{
if (--job->refcnt == 0) {
job->bs->job = NULL;
bdrv_op_unblock_all(job->bs, job->blocker);
bdrv_unref(job->bs);
BlockDriverState *bs = blk_bs(job->blk);
bs->job = NULL;
bdrv_op_unblock_all(bs, job->blocker);
blk_unref(job->blk);
error_free(job->blocker);
g_free(job->id);
QLIST_REMOVE(job, job_list);
g_free(job);
}
}
@ -140,7 +158,7 @@ static void block_job_completed_txn_abort(BlockJob *job)
txn->aborting = true;
/* We are the first failed job. Cancel other jobs. */
QLIST_FOREACH(other_job, &txn->jobs, txn_list) {
ctx = bdrv_get_aio_context(other_job->bs);
ctx = blk_get_aio_context(other_job->blk);
aio_context_acquire(ctx);
}
QLIST_FOREACH(other_job, &txn->jobs, txn_list) {
@ -157,7 +175,7 @@ static void block_job_completed_txn_abort(BlockJob *job)
assert(other_job->completed);
}
QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) {
ctx = bdrv_get_aio_context(other_job->bs);
ctx = blk_get_aio_context(other_job->blk);
block_job_completed_single(other_job);
aio_context_release(ctx);
}
@ -179,7 +197,7 @@ static void block_job_completed_txn_success(BlockJob *job)
}
/* We are the last completed job, commit the transaction. */
QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) {
ctx = bdrv_get_aio_context(other_job->bs);
ctx = blk_get_aio_context(other_job->blk);
aio_context_acquire(ctx);
assert(other_job->ret == 0);
block_job_completed_single(other_job);
@ -189,9 +207,7 @@ static void block_job_completed_txn_success(BlockJob *job)
void block_job_completed(BlockJob *job, int ret)
{
BlockDriverState *bs = job->bs;
assert(bs->job == job);
assert(blk_bs(job->blk)->job == job);
assert(!job->completed);
job->completed = true;
job->ret = ret;
@ -282,11 +298,10 @@ static int block_job_finish_sync(BlockJob *job,
void (*finish)(BlockJob *, Error **errp),
Error **errp)
{
BlockDriverState *bs = job->bs;
Error *local_err = NULL;
int ret;
assert(bs->job == job);
assert(blk_bs(job->blk)->job == job);
block_job_ref(job);
finish(job, &local_err);
@ -297,7 +312,7 @@ static int block_job_finish_sync(BlockJob *job,
}
while (!job->completed) {
aio_poll(job->deferred_to_main_loop ? qemu_get_aio_context() :
bdrv_get_aio_context(bs),
blk_get_aio_context(job->blk),
true);
}
ret = (job->cancelled && job->ret == 0) ? -ECANCELED : job->ret;
@ -318,6 +333,19 @@ int block_job_cancel_sync(BlockJob *job)
return block_job_finish_sync(job, &block_job_cancel_err, NULL);
}
void block_job_cancel_sync_all(void)
{
BlockJob *job;
AioContext *aio_context;
while ((job = QLIST_FIRST(&block_jobs))) {
aio_context = blk_get_aio_context(job->blk);
aio_context_acquire(aio_context);
block_job_cancel_sync(job);
aio_context_release(aio_context);
}
}
int block_job_complete_sync(BlockJob *job, Error **errp)
{
return block_job_finish_sync(job, &block_job_complete, errp);
@ -336,7 +364,7 @@ void block_job_sleep_ns(BlockJob *job, QEMUClockType type, int64_t ns)
if (block_job_is_paused(job)) {
qemu_coroutine_yield();
} else {
co_aio_sleep_ns(bdrv_get_aio_context(job->bs), type, ns);
co_aio_sleep_ns(blk_get_aio_context(job->blk), type, ns);
}
job->busy = true;
}
@ -465,7 +493,7 @@ static void block_job_defer_to_main_loop_bh(void *opaque)
aio_context_acquire(data->aio_context);
/* Fetch BDS AioContext again, in case it has changed */
aio_context = bdrv_get_aio_context(data->job->bs);
aio_context = blk_get_aio_context(data->job->blk);
aio_context_acquire(aio_context);
data->job->deferred_to_main_loop = false;
@ -485,7 +513,7 @@ void block_job_defer_to_main_loop(BlockJob *job,
BlockJobDeferToMainLoopData *data = g_malloc(sizeof(*data));
data->job = job;
data->bh = qemu_bh_new(block_job_defer_to_main_loop_bh, data);
data->aio_context = bdrv_get_aio_context(job->bs);
data->aio_context = blk_get_aio_context(job->blk);
data->fn = fn;
data->opaque = opaque;
job->deferred_to_main_loop = true;

54
dma-helpers.c
View File

@ -70,7 +70,7 @@ void qemu_sglist_destroy(QEMUSGList *qsg)
typedef struct {
BlockAIOCB common;
BlockBackend *blk;
AioContext *ctx;
BlockAIOCB *acb;
QEMUSGList *sg;
uint64_t offset;
@ -80,6 +80,7 @@ typedef struct {
QEMUIOVector iov;
QEMUBH *bh;
DMAIOFunc *io_func;
void *io_func_opaque;
} DMAAIOCB;
static void dma_blk_cb(void *opaque, int ret);
@ -154,8 +155,7 @@ static void dma_blk_cb(void *opaque, int ret)
if (dbs->iov.size == 0) {
trace_dma_map_wait(dbs);
dbs->bh = aio_bh_new(blk_get_aio_context(dbs->blk),
reschedule_dma, dbs);
dbs->bh = aio_bh_new(dbs->ctx, reschedule_dma, dbs);
cpu_register_map_client(dbs->bh);
return;
}
@ -164,8 +164,8 @@ static void dma_blk_cb(void *opaque, int ret)
qemu_iovec_discard_back(&dbs->iov, dbs->iov.size & ~BDRV_SECTOR_MASK);
}
dbs->acb = dbs->io_func(dbs->blk, dbs->offset, &dbs->iov, 0,
dma_blk_cb, dbs);
dbs->acb = dbs->io_func(dbs->offset, &dbs->iov,
dma_blk_cb, dbs, dbs->io_func_opaque);
assert(dbs->acb);
}
@ -191,23 +191,25 @@ static const AIOCBInfo dma_aiocb_info = {
.cancel_async = dma_aio_cancel,
};
BlockAIOCB *dma_blk_io(
BlockBackend *blk, QEMUSGList *sg, uint64_t sector_num,
DMAIOFunc *io_func, BlockCompletionFunc *cb,
BlockAIOCB *dma_blk_io(AioContext *ctx,
QEMUSGList *sg, uint64_t offset,
DMAIOFunc *io_func, void *io_func_opaque,
BlockCompletionFunc *cb,
void *opaque, DMADirection dir)
{
DMAAIOCB *dbs = blk_aio_get(&dma_aiocb_info, blk, cb, opaque);
DMAAIOCB *dbs = qemu_aio_get(&dma_aiocb_info, NULL, cb, opaque);
trace_dma_blk_io(dbs, blk, sector_num, (dir == DMA_DIRECTION_TO_DEVICE));
trace_dma_blk_io(dbs, io_func_opaque, offset, (dir == DMA_DIRECTION_TO_DEVICE));
dbs->acb = NULL;
dbs->blk = blk;
dbs->sg = sg;
dbs->offset = sector_num << BDRV_SECTOR_BITS;
dbs->ctx = ctx;
dbs->offset = offset;
dbs->sg_cur_index = 0;
dbs->sg_cur_byte = 0;
dbs->dir = dir;
dbs->io_func = io_func;
dbs->io_func_opaque = io_func_opaque;
dbs->bh = NULL;
qemu_iovec_init(&dbs->iov, sg->nsg);
dma_blk_cb(dbs, 0);
@ -215,19 +217,39 @@ BlockAIOCB *dma_blk_io(
}
static
BlockAIOCB *dma_blk_read_io_func(int64_t offset, QEMUIOVector *iov,
BlockCompletionFunc *cb, void *cb_opaque,
void *opaque)
{
BlockBackend *blk = opaque;
return blk_aio_preadv(blk, offset, iov, 0, cb, cb_opaque);
}
BlockAIOCB *dma_blk_read(BlockBackend *blk,
QEMUSGList *sg, uint64_t sector,
QEMUSGList *sg, uint64_t offset,
void (*cb)(void *opaque, int ret), void *opaque)
{
return dma_blk_io(blk, sg, sector, blk_aio_preadv, cb, opaque,
return dma_blk_io(blk_get_aio_context(blk),
sg, offset, dma_blk_read_io_func, blk, cb, opaque,
DMA_DIRECTION_FROM_DEVICE);
}
static
BlockAIOCB *dma_blk_write_io_func(int64_t offset, QEMUIOVector *iov,
BlockCompletionFunc *cb, void *cb_opaque,
void *opaque)
{
BlockBackend *blk = opaque;
return blk_aio_pwritev(blk, offset, iov, 0, cb, cb_opaque);
}
BlockAIOCB *dma_blk_write(BlockBackend *blk,
QEMUSGList *sg, uint64_t sector,
QEMUSGList *sg, uint64_t offset,
void (*cb)(void *opaque, int ret), void *opaque)
{
return dma_blk_io(blk, sg, sector, blk_aio_pwritev, cb, opaque,
return dma_blk_io(blk_get_aio_context(blk),
sg, offset, dma_blk_write_io_func, blk, cb, opaque,
DMA_DIRECTION_TO_DEVICE);
}

6
hw/block/nvme.c
View File

@ -239,7 +239,7 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
uint8_t lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas);
uint8_t data_shift = ns->id_ns.lbaf[lba_index].ds;
uint64_t data_size = (uint64_t)nlb << data_shift;
uint64_t aio_slba = slba << (data_shift - BDRV_SECTOR_BITS);
uint64_t data_offset = slba << data_shift;
int is_write = rw->opcode == NVME_CMD_WRITE ? 1 : 0;
enum BlockAcctType acct = is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ;
@ -258,8 +258,8 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
req->has_sg = true;
dma_acct_start(n->conf.blk, &req->acct, &req->qsg, acct);
req->aiocb = is_write ?
dma_blk_write(n->conf.blk, &req->qsg, aio_slba, nvme_rw_cb, req) :
dma_blk_read(n->conf.blk, &req->qsg, aio_slba, nvme_rw_cb, req);
dma_blk_write(n->conf.blk, &req->qsg, data_offset, nvme_rw_cb, req) :
dma_blk_read(n->conf.blk, &req->qsg, data_offset, nvme_rw_cb, req);
return NVME_NO_COMPLETE;
}

6
hw/ide/ahci.c
View File

@ -1006,7 +1006,8 @@ static void execute_ncq_command(NCQTransferState *ncq_tfs)
dma_acct_start(ide_state->blk, &ncq_tfs->acct,
&ncq_tfs->sglist, BLOCK_ACCT_READ);
ncq_tfs->aiocb = dma_blk_read(ide_state->blk, &ncq_tfs->sglist,
ncq_tfs->lba, ncq_cb, ncq_tfs);
ncq_tfs->lba << BDRV_SECTOR_BITS,
ncq_cb, ncq_tfs);
break;
case WRITE_FPDMA_QUEUED:
DPRINTF(port, "NCQ writing %d sectors to LBA %"PRId64", tag %d\n",
@ -1018,7 +1019,8 @@ static void execute_ncq_command(NCQTransferState *ncq_tfs)
dma_acct_start(ide_state->blk, &ncq_tfs->acct,
&ncq_tfs->sglist, BLOCK_ACCT_WRITE);
ncq_tfs->aiocb = dma_blk_write(ide_state->blk, &ncq_tfs->sglist,
ncq_tfs->lba, ncq_cb, ncq_tfs);
ncq_tfs->lba << BDRV_SECTOR_BITS,
ncq_cb, ncq_tfs);
break;
default:
DPRINTF(port, "error: unsupported NCQ command (0x%02x) received\n",

20
hw/ide/core.c
View File

@ -441,13 +441,14 @@ static void ide_issue_trim_cb(void *opaque, int ret)
}
}
BlockAIOCB *ide_issue_trim(BlockBackend *blk,
int64_t offset, QEMUIOVector *qiov, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque)
BlockAIOCB *ide_issue_trim(
int64_t offset, QEMUIOVector *qiov,
BlockCompletionFunc *cb, void *cb_opaque, void *opaque)
{
BlockBackend *blk = opaque;
TrimAIOCB *iocb;
iocb = blk_aio_get(&trim_aiocb_info, blk, cb, opaque);
iocb = blk_aio_get(&trim_aiocb_info, blk, cb, cb_opaque);
iocb->blk = blk;
iocb->bh = qemu_bh_new(ide_trim_bh_cb, iocb);
iocb->ret = 0;
@ -799,6 +800,7 @@ static void ide_dma_cb(void *opaque, int ret)
IDEState *s = opaque;
int n;
int64_t sector_num;
uint64_t offset;
bool stay_active = false;
if (ret == -ECANCELED) {
@ -859,18 +861,20 @@ static void ide_dma_cb(void *opaque, int ret)
return;
}
offset = sector_num << BDRV_SECTOR_BITS;
switch (s->dma_cmd) {
case IDE_DMA_READ:
s->bus->dma->aiocb = dma_blk_read(s->blk, &s->sg, sector_num,
s->bus->dma->aiocb = dma_blk_read(s->blk, &s->sg, offset,
ide_dma_cb, s);
break;
case IDE_DMA_WRITE:
s->bus->dma->aiocb = dma_blk_write(s->blk, &s->sg, sector_num,
s->bus->dma->aiocb = dma_blk_write(s->blk, &s->sg, offset,
ide_dma_cb, s);
break;
case IDE_DMA_TRIM:
s->bus->dma->aiocb = dma_blk_io(s->blk, &s->sg, sector_num,
ide_issue_trim, ide_dma_cb, s,
s->bus->dma->aiocb = dma_blk_io(blk_get_aio_context(s->blk),
&s->sg, offset,
ide_issue_trim, s->blk, ide_dma_cb, s,
DMA_DIRECTION_TO_DEVICE);
break;
default:

6
hw/ide/internal.h
View File

@ -613,9 +613,9 @@ void ide_transfer_start(IDEState *s, uint8_t *buf, int size,
EndTransferFunc *end_transfer_func);
void ide_transfer_stop(IDEState *s);
void ide_set_inactive(IDEState *s, bool more);
BlockAIOCB *ide_issue_trim(BlockBackend *blk,
int64_t offset, QEMUIOVector *qiov, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *ide_issue_trim(
int64_t offset, QEMUIOVector *qiov,
BlockCompletionFunc *cb, void *cb_opaque, void *opaque);
BlockAIOCB *ide_buffered_readv(IDEState *s, int64_t sector_num,
QEMUIOVector *iov, int nb_sectors,
BlockCompletionFunc *cb, void *opaque);

2
hw/ide/macio.c
View File

@ -230,7 +230,7 @@ static void pmac_dma_trim(BlockBackend *blk,
s->io_buffer_index += io->len;
io->len = 0;
s->bus->dma->aiocb = ide_issue_trim(blk, offset, &io->iov, 0, cb, io);
s->bus->dma->aiocb = ide_issue_trim(offset, &io->iov, cb, io, blk);
}
static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)

8
hw/scsi/scsi-disk.c
View File

@ -335,7 +335,8 @@ static void scsi_do_read(SCSIDiskReq *r, int ret)
if (r->req.sg) {
dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_READ);
r->req.resid -= r->req.sg->size;
r->req.aiocb = dma_blk_read(s->qdev.conf.blk, r->req.sg, r->sector,
r->req.aiocb = dma_blk_read(s->qdev.conf.blk, r->req.sg,
r->sector << BDRV_SECTOR_BITS,
scsi_dma_complete, r);
} else {
scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
@ -539,7 +540,8 @@ static void scsi_write_data(SCSIRequest *req)
if (r->req.sg) {
dma_acct_start(s->qdev.conf.blk, &r->acct, r->req.sg, BLOCK_ACCT_WRITE);
r->req.resid -= r->req.sg->size;
r->req.aiocb = dma_blk_write(s->qdev.conf.blk, r->req.sg, r->sector,
r->req.aiocb = dma_blk_write(s->qdev.conf.blk, r->req.sg,
r->sector << BDRV_SECTOR_BITS,
scsi_dma_complete, r);
} else {
block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
@ -1778,7 +1780,7 @@ static void scsi_disk_emulate_write_same(SCSIDiskReq *r, uint8_t *inbuf)
block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct,
nb_sectors * s->qdev.blocksize,
BLOCK_ACCT_WRITE);
r->req.aiocb = blk_aio_write_zeroes(s->qdev.conf.blk,
r->req.aiocb = blk_aio_pwrite_zeroes(s->qdev.conf.blk,
r->req.cmd.lba * s->qdev.blocksize,
nb_sectors * s->qdev.blocksize,
flags, scsi_aio_complete, r);

24
include/block/block.h
View File

@ -17,7 +17,6 @@ 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 */
@ -198,7 +197,6 @@ BlockDriver *bdrv_find_format(const char *format_name);
int bdrv_create(BlockDriver *drv, const char* filename,
QemuOpts *opts, Error **errp);
int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp);
BlockDriverState *bdrv_new_root(void);
BlockDriverState *bdrv_new(void);
void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top);
void bdrv_replace_in_backing_chain(BlockDriverState *old,
@ -214,8 +212,8 @@ BdrvChild *bdrv_open_child(const char *filename,
void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd);
int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options,
const char *bdref_key, Error **errp);
int bdrv_open(BlockDriverState **pbs, const char *filename,
const char *reference, QDict *options, int flags, Error **errp);
BlockDriverState *bdrv_open(const char *filename, const char *reference,
QDict *options, int flags, Error **errp);
BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
BlockDriverState *bs,
QDict *options, int flags);
@ -244,10 +242,6 @@ int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset,
const void *buf, int count);
int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov);
int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);
int coroutine_fn bdrv_co_readv_no_serialising(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);
int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov);
/*
@ -402,7 +396,19 @@ BlockDriverState *bdrv_lookup_bs(const char *device,
Error **errp);
bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base);
BlockDriverState *bdrv_next_node(BlockDriverState *bs);
BdrvNextIterator *bdrv_next(BdrvNextIterator *it, BlockDriverState **bs);
typedef struct BdrvNextIterator {
enum {
BDRV_NEXT_BACKEND_ROOTS,
BDRV_NEXT_MONITOR_OWNED,
} phase;
BlockBackend *blk;
BlockDriverState *bs;
} BdrvNextIterator;
BlockDriverState *bdrv_first(BdrvNextIterator *it);
BlockDriverState *bdrv_next(BdrvNextIterator *it);
BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs);
int bdrv_is_encrypted(BlockDriverState *bs);
int bdrv_key_required(BlockDriverState *bs);

3
include/block/block_int.h
View File

@ -719,7 +719,8 @@ void hmp_drive_add_node(Monitor *mon, const char *optstr);
BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs,
const char *child_name,
const BdrvChildRole *child_role);
const BdrvChildRole *child_role,
void *opaque);
void bdrv_root_unref_child(BdrvChild *child);
const char *bdrv_get_parent_name(const BlockDriverState *bs);

23
include/block/blockjob.h
View File

@ -82,7 +82,7 @@ struct BlockJob {
const BlockJobDriver *driver;
/** The block device on which the job is operating. */
BlockDriverState *bs;
BlockBackend *blk;
/**
* The ID of the block job. Currently the BlockBackend name of the BDS
@ -135,6 +135,9 @@ struct BlockJob {
*/
bool deferred_to_main_loop;
/** Element of the list of block jobs */
QLIST_ENTRY(BlockJob) job_list;
/** Status that is published by the query-block-jobs QMP API */
BlockDeviceIoStatus iostatus;
@ -172,6 +175,17 @@ struct BlockJob {
QLIST_ENTRY(BlockJob) txn_list;
};
/**
* block_job_next:
* @job: A block job, or %NULL.
*
* Get the next element from the list of block jobs after @job, or the
* first one if @job is %NULL.
*
* Returns the requested job, or %NULL if there are no more jobs left.
*/
BlockJob *block_job_next(BlockJob *job);
/**
* block_job_create:
* @job_type: The class object for the newly-created job.
@ -356,6 +370,13 @@ bool block_job_is_paused(BlockJob *job);
*/
int block_job_cancel_sync(BlockJob *job);
/**
* block_job_cancel_sync_all:
*
* Synchronously cancels all jobs using block_job_cancel_sync().
*/
void block_job_cancel_sync_all(void);
/**
* block_job_complete_sync:
* @job: The job to be completed.

23
include/sysemu/block-backend.h
View File

@ -78,8 +78,7 @@ typedef struct BlockBackendPublic {
QLIST_ENTRY(BlockBackendPublic) round_robin;
} BlockBackendPublic;
BlockBackend *blk_new(Error **errp);
BlockBackend *blk_new_with_bs(Error **errp);
BlockBackend *blk_new(void);
BlockBackend *blk_new_open(const char *filename, const char *reference,
QDict *options, int flags, Error **errp);
int blk_get_refcnt(BlockBackend *blk);
@ -114,11 +113,17 @@ void *blk_get_attached_dev(BlockBackend *blk);
void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void *opaque);
int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,
int count);
int blk_write_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags);
BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque);
int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags);
int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset,
unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags);
int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags);
BlockAIOCB *blk_aio_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque);
int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count);
int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count,
BdrvRequestFlags flags);
@ -196,8 +201,8 @@ int blk_get_open_flags_from_root_state(BlockBackend *blk);
void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
BlockCompletionFunc *cb, void *opaque);
int coroutine_fn blk_co_write_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags);
int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags);
int blk_write_compressed(BlockBackend *blk, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
int blk_truncate(BlockBackend *blk, int64_t offset);

18
include/sysemu/dma.h
View File

@ -194,19 +194,19 @@ void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len);
void qemu_sglist_destroy(QEMUSGList *qsg);
#endif
typedef BlockAIOCB *DMAIOFunc(BlockBackend *blk, int64_t offset,
QEMUIOVector *iov, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque);
typedef BlockAIOCB *DMAIOFunc(int64_t offset, QEMUIOVector *iov,
BlockCompletionFunc *cb, void *cb_opaque,
void *opaque);
BlockAIOCB *dma_blk_io(BlockBackend *blk,
QEMUSGList *sg, uint64_t sector_num,
DMAIOFunc *io_func, BlockCompletionFunc *cb,
void *opaque, DMADirection dir);
BlockAIOCB *dma_blk_io(AioContext *ctx,
QEMUSGList *sg, uint64_t offset,
DMAIOFunc *io_func, void *io_func_opaque,
BlockCompletionFunc *cb, void *opaque, DMADirection dir);
BlockAIOCB *dma_blk_read(BlockBackend *blk,
QEMUSGList *sg, uint64_t sector,
QEMUSGList *sg, uint64_t offset,
BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *dma_blk_write(BlockBackend *blk,
QEMUSGList *sg, uint64_t sector,
QEMUSGList *sg, uint64_t offset,
BlockCompletionFunc *cb, void *opaque);
uint64_t dma_buf_read(uint8_t *ptr, int32_t len, QEMUSGList *sg);
uint64_t dma_buf_write(uint8_t *ptr, int32_t len, QEMUSGList *sg);

4
migration/block.c
View File

@ -383,7 +383,7 @@ static void init_blk_migration(QEMUFile *f)
BlockDriverState *bs;
BlkMigDevState *bmds;
int64_t sectors;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
block_mig_state.submitted = 0;
block_mig_state.read_done = 0;
@ -394,7 +394,7 @@ static void init_blk_migration(QEMUFile *f)
block_mig_state.zero_blocks = migrate_zero_blocks();
while ((it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
if (bdrv_is_read_only(bs)) {
continue;
}

4
monitor.c
View File

@ -3432,12 +3432,12 @@ static void vm_completion(ReadLineState *rs, const char *str)
{
size_t len;
BlockDriverState *bs;
BdrvNextIterator *it = NULL;
BdrvNextIterator it;
len = strlen(str);
readline_set_completion_index(rs, len);
while ((it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
SnapshotInfoList *snapshots, *snapshot;
AioContext *ctx = bdrv_get_aio_context(bs);
bool ok = false;

6
qemu-img.c
View File

@ -775,7 +775,7 @@ static void common_block_job_cb(void *opaque, int ret)
static void run_block_job(BlockJob *job, Error **errp)
{
AioContext *aio_context = bdrv_get_aio_context(job->bs);
AioContext *aio_context = blk_get_aio_context(job->blk);
do {
aio_poll(aio_context, true);
@ -1606,8 +1606,8 @@ static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors,
if (s->has_zero_init) {
break;
}
ret = blk_write_zeroes(s->target, sector_num << BDRV_SECTOR_BITS,
n << BDRV_SECTOR_BITS, 0);
ret = blk_pwrite_zeroes(s->target, sector_num << BDRV_SECTOR_BITS,
n << BDRV_SECTOR_BITS, 0);
if (ret < 0) {
return ret;
}

22
qemu-io-cmds.c
View File

@ -451,12 +451,12 @@ typedef struct {
bool done;
} CoWriteZeroes;
static void coroutine_fn co_write_zeroes_entry(void *opaque)
static void coroutine_fn co_pwrite_zeroes_entry(void *opaque)
{
CoWriteZeroes *data = opaque;
data->ret = blk_co_write_zeroes(data->blk, data->offset, data->count,
data->flags);
data->ret = blk_co_pwrite_zeroes(data->blk, data->offset, data->count,
data->flags);
data->done = true;
if (data->ret < 0) {
*data->total = data->ret;
@ -466,8 +466,8 @@ static void coroutine_fn co_write_zeroes_entry(void *opaque)
*data->total = data->count;
}
static int do_co_write_zeroes(BlockBackend *blk, int64_t offset, int64_t count,
int flags, int64_t *total)
static int do_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int64_t count, int flags, int64_t *total)
{
Coroutine *co;
CoWriteZeroes data = {
@ -483,7 +483,7 @@ static int do_co_write_zeroes(BlockBackend *blk, int64_t offset, int64_t count,
return -ERANGE;
}
co = qemu_coroutine_create(co_write_zeroes_entry);
co = qemu_coroutine_create(co_pwrite_zeroes_entry);
qemu_coroutine_enter(co, &data);
while (!data.done) {
aio_poll(blk_get_aio_context(blk), true);
@ -901,7 +901,7 @@ static void write_help(void)
" -C, -- report statistics in a machine parsable format\n"
" -q, -- quiet mode, do not show I/O statistics\n"
" -u, -- with -z, allow unmapping\n"
" -z, -- write zeroes using blk_co_write_zeroes\n"
" -z, -- write zeroes using blk_co_pwrite_zeroes\n"
"\n");
}
@ -1033,7 +1033,7 @@ static int write_f(BlockBackend *blk, int argc, char **argv)
if (bflag) {
cnt = do_save_vmstate(blk, buf, offset, count, &total);
} else if (zflag) {
cnt = do_co_write_zeroes(blk, offset, count, flags, &total);
cnt = do_co_pwrite_zeroes(blk, offset, count, flags, &total);
} else if (cflag) {
cnt = do_write_compressed(blk, buf, offset, count, &total);
} else {
@ -1376,7 +1376,7 @@ static void aio_write_help(void)
" -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"
" -z, -- write zeroes using blk_aio_pwrite_zeroes\n"
"\n");
}
@ -1475,8 +1475,8 @@ static int aio_write_f(BlockBackend *blk, int argc, char **argv)
}
ctx->qiov.size = count;
blk_aio_write_zeroes(blk, ctx->offset, count, flags, aio_write_done,
ctx);
blk_aio_pwrite_zeroes(blk, ctx->offset, count, flags, aio_write_done,
ctx);
} else {
nr_iov = argc - optind;
ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov,

5
qmp.c
View File

@ -181,7 +181,7 @@ void qmp_cont(Error **errp)
Error *local_err = NULL;
BlockBackend *blk;
BlockDriverState *bs;
BdrvNextIterator *it;
BdrvNextIterator it;
/* if there is a dump in background, we should wait until the dump
* finished */
@ -201,8 +201,7 @@ void qmp_cont(Error **errp)
blk_iostatus_reset(blk);
}
it = NULL;
while ((it = bdrv_next(it, &bs))) {
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
bdrv_add_key(bs, NULL, &local_err);
if (local_err) {
error_propagate(errp, local_err);

27
tests/qemu-iotests/041
View File

@ -207,33 +207,6 @@ class TestSingleBlockdev(TestSingleDrive):
test_image_not_found = None
test_small_buffer2 = None
class TestBlockdevAttached(iotests.QMPTestCase):
image_len = 1 * 1024 * 1024 # MB
def setUp(self):
iotests.create_image(backing_img, self.image_len)
qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, target_img)
self.vm = iotests.VM().add_drive(test_img)
self.vm.launch()
def tearDown(self):
self.vm.shutdown()
os.remove(test_img)
os.remove(target_img)
def test_blockdev_attached(self):
self.assert_no_active_block_jobs()
args = {'options':
{'driver': iotests.imgfmt,
'id': 'drive1',
'file': { 'filename': target_img, 'driver': 'file' } } }
result = self.vm.qmp("blockdev-add", **args)
self.assert_qmp(result, 'return', {})
result = self.vm.qmp('blockdev-mirror', device='drive0', sync='full',
target='drive1')
self.assert_qmp(result, 'error/class', 'GenericError')
class TestSingleDriveZeroLength(TestSingleDrive):
image_len = 0
test_small_buffer2 = None

4
tests/qemu-iotests/041.out
View File

@ -1,5 +1,5 @@
............................................................................
...........................................................................
----------------------------------------------------------------------
Ran 76 tests
Ran 75 tests
OK

3
tests/test-blockjob-txn.c
View File

@ -15,6 +15,7 @@
#include "qapi/error.h"
#include "qemu/main-loop.h"
#include "block/blockjob.h"
#include "sysemu/block-backend.h"
typedef struct {
BlockJob common;
@ -30,7 +31,7 @@ static const BlockJobDriver test_block_job_driver = {
static void test_block_job_complete(BlockJob *job, void *opaque)
{
BlockDriverState *bs = job->bs;
BlockDriverState *bs = blk_bs(job->blk);
int rc = (intptr_t)opaque;
if (block_job_is_cancelled(job)) {

6
tests/test-throttle.c
View File

@ -578,9 +578,9 @@ static void test_groups(void)
BlockBackend *blk1, *blk2, *blk3;
BlockBackendPublic *blkp1, *blkp2, *blkp3;
blk1 = blk_new_with_bs(&error_abort);
blk2 = blk_new_with_bs(&error_abort);
blk3 = blk_new_with_bs(&error_abort);
blk1 = blk_new();
blk2 = blk_new();
blk3 = blk_new();
blkp1 = blk_get_public(blk1);
blkp2 = blk_get_public(blk2);

8
trace-events
View File

@ -61,6 +61,10 @@ virtio_console_chr_event(unsigned int port, int event) "port %u, event %d"
bdrv_open_common(void *bs, const char *filename, int flags, const char *format_name) "bs %p filename \"%s\" flags %#x format_name \"%s\""
bdrv_lock_medium(void *bs, bool locked) "bs %p locked %d"
# block/block-backend.c
blk_co_preadv(void *blk, void *bs, int64_t offset, unsigned int bytes, int flags) "blk %p bs %p offset %"PRId64" bytes %u flags %x"
blk_co_pwritev(void *blk, void *bs, int64_t offset, unsigned int bytes, int flags) "blk %p bs %p offset %"PRId64" bytes %u flags %x"
# block/io.c
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"
@ -68,8 +72,6 @@ bdrv_aio_readv(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %
bdrv_aio_writev(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
bdrv_aio_write_zeroes(void *bs, int64_t sector_num, int nb_sectors, int flags, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d flags %#x opaque %p"
bdrv_co_readv(void *bs, int64_t sector_num, int nb_sector) "bs %p sector_num %"PRId64" nb_sectors %d"
bdrv_co_copy_on_readv(void *bs, int64_t sector_num, int nb_sector) "bs %p sector_num %"PRId64" nb_sectors %d"
bdrv_co_readv_no_serialising(void *bs, int64_t sector_num, int nb_sector) "bs %p sector_num %"PRId64" nb_sectors %d"
bdrv_co_writev(void *bs, int64_t sector_num, int nb_sector) "bs %p sector_num %"PRId64" nb_sectors %d"
bdrv_co_write_zeroes(void *bs, int64_t sector_num, int nb_sector, int flags) "bs %p sector_num %"PRId64" nb_sectors %d flags %#x"
bdrv_co_do_copy_on_readv(void *bs, int64_t sector_num, int nb_sectors, int64_t cluster_sector_num, int cluster_nb_sectors) "bs %p sector_num %"PRId64" nb_sectors %d cluster_sector_num %"PRId64" cluster_nb_sectors %d"
@ -1143,7 +1145,7 @@ win_helper_done(uint32_t tl) "tl=%d"
win_helper_retry(uint32_t tl) "tl=%d"
# dma-helpers.c
dma_blk_io(void *dbs, void *bs, int64_t sector_num, bool to_dev) "dbs=%p bs=%p sector_num=%" PRId64 " to_dev=%d"
dma_blk_io(void *dbs, void *bs, int64_t offset, bool to_dev) "dbs=%p bs=%p offset=%" PRId64 " to_dev=%d"
dma_aio_cancel(void *dbs) "dbs=%p"
dma_complete(void *dbs, int ret, void *cb) "dbs=%p ret=%d cb=%p"
dma_blk_cb(void *dbs, int ret) "dbs=%p ret=%d"