COMMIT_BUFFER_SIZE = 512 * 1024, /* in bytes */
};
-#define SLICE_TIME 100000000ULL /* ns */
-
typedef struct CommitBlockJob {
BlockJob common;
- RateLimit limit;
- BlockDriverState *active;
BlockDriverState *commit_top_bs;
BlockBackend *top;
BlockBackend *base;
BlockdevOnError on_error;
int base_flags;
- int orig_overlay_flags;
char *backing_file_str;
} CommitBlockJob;
int ret;
} CommitCompleteData;
-static void commit_complete(BlockJob *job, void *opaque)
+static void commit_complete(Job *job, void *opaque)
{
- CommitBlockJob *s = container_of(job, CommitBlockJob, common);
+ CommitBlockJob *s = container_of(job, CommitBlockJob, common.job);
+ BlockJob *bjob = &s->common;
CommitCompleteData *data = opaque;
- BlockDriverState *active = s->active;
BlockDriverState *top = blk_bs(s->top);
BlockDriverState *base = blk_bs(s->base);
- BlockDriverState *overlay_bs = bdrv_find_overlay(active, s->commit_top_bs);
+ BlockDriverState *commit_top_bs = s->commit_top_bs;
int ret = data->ret;
bool remove_commit_top_bs = false;
- /* Make sure overlay_bs and top stay around until bdrv_set_backing_hd() */
+ /* Make sure commit_top_bs and top stay around until bdrv_replace_node() */
bdrv_ref(top);
- if (overlay_bs) {
- bdrv_ref(overlay_bs);
- }
+ bdrv_ref(commit_top_bs);
/* Remove base node parent that still uses BLK_PERM_WRITE/RESIZE before
* the normal backing chain can be restored. */
blk_unref(s->base);
- if (!block_job_is_cancelled(&s->common) && ret == 0) {
+ if (!job_is_cancelled(job) && ret == 0) {
/* success */
- ret = bdrv_drop_intermediate(active, s->commit_top_bs, base,
+ ret = bdrv_drop_intermediate(s->commit_top_bs, base,
s->backing_file_str);
- } else if (overlay_bs) {
+ } else {
/* XXX Can (or should) we somehow keep 'consistent read' blocked even
* after the failed/cancelled commit job is gone? If we already wrote
* something to base, the intermediate images aren't valid any more. */
if (s->base_flags != bdrv_get_flags(base)) {
bdrv_reopen(base, s->base_flags, NULL);
}
- if (overlay_bs && s->orig_overlay_flags != bdrv_get_flags(overlay_bs)) {
- bdrv_reopen(overlay_bs, s->orig_overlay_flags, NULL);
- }
g_free(s->backing_file_str);
blk_unref(s->top);
/* If there is more than one reference to the job (e.g. if called from
- * block_job_finish_sync()), block_job_completed() won't free it and
- * therefore the blockers on the intermediate nodes remain. This would
- * cause bdrv_set_backing_hd() to fail. */
- block_job_remove_all_bdrv(job);
+ * job_finish_sync()), job_completed() won't free it and therefore the
+ * blockers on the intermediate nodes remain. This would cause
+ * bdrv_set_backing_hd() to fail. */
+ block_job_remove_all_bdrv(bjob);
- block_job_completed(&s->common, ret);
+ job_completed(job, ret, NULL);
g_free(data);
/* If bdrv_drop_intermediate() didn't already do that, remove the commit
* filter driver from the backing chain. Do this as the final step so that
* the 'consistent read' permission can be granted. */
if (remove_commit_top_bs) {
- bdrv_set_backing_hd(overlay_bs, top, &error_abort);
+ bdrv_child_try_set_perm(commit_top_bs->backing, 0, BLK_PERM_ALL,
+ &error_abort);
+ bdrv_replace_node(commit_top_bs, backing_bs(commit_top_bs),
+ &error_abort);
}
- bdrv_unref(overlay_bs);
+ bdrv_unref(commit_top_bs);
bdrv_unref(top);
}
int64_t n = 0; /* bytes */
void *buf = NULL;
int bytes_written = 0;
- int64_t base_len;
+ int64_t len, base_len;
- ret = s->common.len = blk_getlength(s->top);
-
- if (s->common.len < 0) {
+ ret = len = blk_getlength(s->top);
+ if (len < 0) {
goto out;
}
+ job_progress_set_remaining(&s->common.job, len);
ret = base_len = blk_getlength(s->base);
if (base_len < 0) {
goto out;
}
- if (base_len < s->common.len) {
- ret = blk_truncate(s->base, s->common.len, PREALLOC_MODE_OFF, NULL);
+ if (base_len < len) {
+ ret = blk_truncate(s->base, len, PREALLOC_MODE_OFF, NULL);
if (ret) {
goto out;
}
buf = blk_blockalign(s->top, COMMIT_BUFFER_SIZE);
- for (offset = 0; offset < s->common.len; offset += n) {
+ for (offset = 0; offset < len; offset += n) {
bool copy;
/* Note that even when no rate limit is applied we need to yield
* with no pending I/O here so that bdrv_drain_all() returns.
*/
- block_job_sleep_ns(&s->common, QEMU_CLOCK_REALTIME, delay_ns);
- if (block_job_is_cancelled(&s->common)) {
+ job_sleep_ns(&s->common.job, delay_ns);
+ if (job_is_cancelled(&s->common.job)) {
break;
}
/* Copy if allocated above the base */
}
}
/* Publish progress */
- s->common.offset += n;
+ job_progress_update(&s->common.job, n);
- if (copy && s->common.speed) {
- delay_ns = ratelimit_calculate_delay(&s->limit, n);
+ if (copy) {
+ delay_ns = block_job_ratelimit_get_delay(&s->common, n);
+ } else {
+ delay_ns = 0;
}
}
data = g_malloc(sizeof(*data));
data->ret = ret;
- block_job_defer_to_main_loop(&s->common, commit_complete, data);
-}
-
-static void commit_set_speed(BlockJob *job, int64_t speed, Error **errp)
-{
- CommitBlockJob *s = container_of(job, CommitBlockJob, common);
-
- if (speed < 0) {
- error_setg(errp, QERR_INVALID_PARAMETER, "speed");
- return;
- }
- ratelimit_set_speed(&s->limit, speed, SLICE_TIME);
+ job_defer_to_main_loop(&s->common.job, commit_complete, data);
}
static const BlockJobDriver commit_job_driver = {
- .instance_size = sizeof(CommitBlockJob),
- .job_type = BLOCK_JOB_TYPE_COMMIT,
- .set_speed = commit_set_speed,
- .start = commit_run,
+ .job_driver = {
+ .instance_size = sizeof(CommitBlockJob),
+ .job_type = JOB_TYPE_COMMIT,
+ .free = block_job_free,
+ .user_resume = block_job_user_resume,
+ .drain = block_job_drain,
+ .start = commit_run,
+ },
};
static int coroutine_fn bdrv_commit_top_preadv(BlockDriverState *bs,
return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags);
}
-static int64_t coroutine_fn bdrv_commit_top_get_block_status(
- BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum,
- BlockDriverState **file)
-{
- *pnum = nb_sectors;
- *file = bs->backing->bs;
- return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID |
- (sector_num << BDRV_SECTOR_BITS);
-}
-
static void bdrv_commit_top_refresh_filename(BlockDriverState *bs, QDict *opts)
{
bdrv_refresh_filename(bs->backing->bs);
static void bdrv_commit_top_child_perm(BlockDriverState *bs, BdrvChild *c,
const BdrvChildRole *role,
+ BlockReopenQueue *reopen_queue,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared)
{
static BlockDriver bdrv_commit_top = {
.format_name = "commit_top",
.bdrv_co_preadv = bdrv_commit_top_preadv,
- .bdrv_co_get_block_status = bdrv_commit_top_get_block_status,
+ .bdrv_co_block_status = bdrv_co_block_status_from_backing,
.bdrv_refresh_filename = bdrv_commit_top_refresh_filename,
.bdrv_close = bdrv_commit_top_close,
.bdrv_child_perm = bdrv_commit_top_child_perm,
const char *filter_node_name, Error **errp)
{
CommitBlockJob *s;
- BlockReopenQueue *reopen_queue = NULL;
- int orig_overlay_flags;
int orig_base_flags;
BlockDriverState *iter;
- BlockDriverState *overlay_bs;
BlockDriverState *commit_top_bs = NULL;
Error *local_err = NULL;
int ret;
return;
}
- overlay_bs = bdrv_find_overlay(bs, top);
-
- if (overlay_bs == NULL) {
- error_setg(errp, "Could not find overlay image for %s:", top->filename);
- return;
- }
-
- s = block_job_create(job_id, &commit_job_driver, bs, 0, BLK_PERM_ALL,
- speed, BLOCK_JOB_DEFAULT, NULL, NULL, errp);
+ s = block_job_create(job_id, &commit_job_driver, NULL, bs, 0, BLK_PERM_ALL,
+ speed, JOB_DEFAULT, NULL, NULL, errp);
if (!s) {
return;
}
- orig_base_flags = bdrv_get_flags(base);
- orig_overlay_flags = bdrv_get_flags(overlay_bs);
-
- /* convert base & overlay_bs to r/w, if necessary */
+ /* convert base to r/w, if necessary */
+ orig_base_flags = bdrv_get_flags(base);
if (!(orig_base_flags & BDRV_O_RDWR)) {
- reopen_queue = bdrv_reopen_queue(reopen_queue, base, NULL,
- orig_base_flags | BDRV_O_RDWR);
- }
- if (!(orig_overlay_flags & BDRV_O_RDWR)) {
- reopen_queue = bdrv_reopen_queue(reopen_queue, overlay_bs, NULL,
- orig_overlay_flags | BDRV_O_RDWR);
- }
- if (reopen_queue) {
- bdrv_reopen_multiple(bdrv_get_aio_context(bs), reopen_queue, &local_err);
+ bdrv_reopen(base, orig_base_flags | BDRV_O_RDWR, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
goto fail;
error_propagate(errp, local_err);
goto fail;
}
- bdrv_set_backing_hd(overlay_bs, commit_top_bs, &local_err);
+ bdrv_replace_node(top, commit_top_bs, &local_err);
if (local_err) {
bdrv_unref(commit_top_bs);
commit_top_bs = NULL;
goto fail;
}
- /* overlay_bs must be blocked because it needs to be modified to
- * update the backing image string. */
- ret = block_job_add_bdrv(&s->common, "overlay of top", overlay_bs,
- BLK_PERM_GRAPH_MOD, BLK_PERM_ALL, errp);
- if (ret < 0) {
- goto fail;
- }
-
s->base = blk_new(BLK_PERM_CONSISTENT_READ
| BLK_PERM_WRITE
| BLK_PERM_RESIZE,
goto fail;
}
- s->active = bs;
-
- s->base_flags = orig_base_flags;
- s->orig_overlay_flags = orig_overlay_flags;
-
+ s->base_flags = orig_base_flags;
s->backing_file_str = g_strdup(backing_file_str);
-
s->on_error = on_error;
trace_commit_start(bs, base, top, s);
- block_job_start(&s->common);
+ job_start(&s->common.job);
return;
fail:
blk_unref(s->top);
}
if (commit_top_bs) {
- bdrv_set_backing_hd(overlay_bs, top, &error_abort);
+ bdrv_replace_node(commit_top_bs, top, &error_abort);
}
- block_job_early_fail(&s->common);
+ job_early_fail(&s->common.job);
}
projects / qemu.git / blobdiff