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blockjob: Wrappers for progress counter access

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Block job drivers are not expected to mess with the internals of the
BlockJob object, so provide wrapper functions for one of the cases where
they still do it: Updating the progress counter.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Kevin Wolf 2018-01-18 18:08:22 +01:00
parent 37aa19b63c
commit 05df8a6a2b
6 changed files with 63 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
block/backup.c
View File

@ -39,6 +39,7 @@ typedef struct BackupBlockJob {
BlockdevOnError on_source_error;
BlockdevOnError on_target_error;
CoRwlock flush_rwlock;
uint64_t len;
uint64_t bytes_read;
int64_t cluster_size;
bool compress;
@ -118,7 +119,7 @@ static int coroutine_fn backup_do_cow(BackupBlockJob *job,
trace_backup_do_cow_process(job, start);
n = MIN(job->cluster_size, job->common.len - start);
n = MIN(job->cluster_size, job->len - start);
if (!bounce_buffer) {
bounce_buffer = blk_blockalign(blk, job->cluster_size);
@ -159,7 +160,7 @@ static int coroutine_fn backup_do_cow(BackupBlockJob *job,
* offset field is an opaque progress value, it is not a disk offset.
*/
job->bytes_read += n;
job->common.offset += n;
block_job_progress_update(&job->common, n);
}
out:
@ -261,7 +262,7 @@ void backup_do_checkpoint(BlockJob *job, Error **errp)
return;
}
len = DIV_ROUND_UP(backup_job->common.len, backup_job->cluster_size);
len = DIV_ROUND_UP(backup_job->len, backup_job->cluster_size);
hbitmap_set(backup_job->copy_bitmap, 0, len);
}
@ -420,8 +421,9 @@ static void backup_incremental_init_copy_bitmap(BackupBlockJob *job)
bdrv_set_dirty_iter(dbi, next_cluster * job->cluster_size);
}
job->common.offset = job->common.len -
hbitmap_count(job->copy_bitmap) * job->cluster_size;
/* TODO block_job_progress_set_remaining() would make more sense */
block_job_progress_update(&job->common,
job->len - hbitmap_count(job->copy_bitmap) * job->cluster_size);
bdrv_dirty_iter_free(dbi);
}
@ -437,7 +439,9 @@ static void coroutine_fn backup_run(void *opaque)
QLIST_INIT(&job->inflight_reqs);
qemu_co_rwlock_init(&job->flush_rwlock);
nb_clusters = DIV_ROUND_UP(job->common.len, job->cluster_size);
nb_clusters = DIV_ROUND_UP(job->len, job->cluster_size);
block_job_progress_set_remaining(&job->common, job->len);
job->copy_bitmap = hbitmap_alloc(nb_clusters, 0);
if (job->sync_mode == MIRROR_SYNC_MODE_INCREMENTAL) {
backup_incremental_init_copy_bitmap(job);
@ -461,7 +465,7 @@ static void coroutine_fn backup_run(void *opaque)
ret = backup_run_incremental(job);
} else {
/* Both FULL and TOP SYNC_MODE's require copying.. */
for (offset = 0; offset < job->common.len;
for (offset = 0; offset < job->len;
offset += job->cluster_size) {
bool error_is_read;
int alloced = 0;
@ -620,7 +624,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
goto error;
}
/* job->common.len is fixed, so we can't allow resize */
/* job->len is fixed, so we can't allow resize */
job = block_job_create(job_id, &backup_job_driver, txn, bs,
BLK_PERM_CONSISTENT_READ,
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE |
@ -676,7 +680,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
/* Required permissions are already taken with target's blk_new() */
block_job_add_bdrv(&job->common, "target", target, 0, BLK_PERM_ALL,
&error_abort);
job->common.len = len;
job->len = len;
return &job->common;

16
block/commit.c
View File

@ -146,21 +146,21 @@ static void coroutine_fn commit_run(void *opaque)
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;
}
block_job_progress_set_remaining(&s->common, 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;
}
@ -168,7 +168,7 @@ static void coroutine_fn commit_run(void *opaque)
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
@ -198,7 +198,7 @@ static void coroutine_fn commit_run(void *opaque)
}
}
/* Publish progress */
s->common.offset += n;
block_job_progress_update(&s->common, n);
if (copy && s->common.speed) {
delay_ns = ratelimit_calculate_delay(&s->limit, n);

11
block/mirror.c
View File

@ -121,7 +121,7 @@ static void mirror_iteration_done(MirrorOp *op, int ret)
bitmap_set(s->cow_bitmap, chunk_num, nb_chunks);
}
if (!s->initial_zeroing_ongoing) {
s->common.offset += op->bytes;
block_job_progress_update(&s->common, op->bytes);
}
}
qemu_iovec_destroy(&op->qiov);
@ -792,11 +792,10 @@ static void coroutine_fn mirror_run(void *opaque)
block_job_pause_point(&s->common);
cnt = bdrv_get_dirty_count(s->dirty_bitmap);
/* s->common.offset contains the number of bytes already processed so
* far, cnt is the number of dirty bytes remaining and
* s->bytes_in_flight is the number of bytes currently being
* processed; together those are the current total operation length */
s->common.len = s->common.offset + s->bytes_in_flight + cnt;
/* cnt is the number of dirty bytes remaining and s->bytes_in_flight is
* the number of bytes currently being processed; together those are
* the current remaining operation length */
block_job_progress_set_remaining(&s->common, s->bytes_in_flight + cnt);
/* Note that even when no rate limit is applied we need to yield
* periodically with no pending I/O so that bdrv_drain_all() returns.

14
block/stream.c
View File

@ -107,6 +107,7 @@ static void coroutine_fn stream_run(void *opaque)
BlockBackend *blk = s->common.blk;
BlockDriverState *bs = blk_bs(blk);
BlockDriverState *base = s->base;
int64_t len;
int64_t offset = 0;
uint64_t delay_ns = 0;
int error = 0;
@ -118,11 +119,12 @@ static void coroutine_fn stream_run(void *opaque)
goto out;
}
s->common.len = bdrv_getlength(bs);
if (s->common.len < 0) {
ret = s->common.len;
len = bdrv_getlength(bs);
if (len < 0) {
ret = len;
goto out;
}
block_job_progress_set_remaining(&s->common, len);
buf = qemu_blockalign(bs, STREAM_BUFFER_SIZE);
@ -135,7 +137,7 @@ static void coroutine_fn stream_run(void *opaque)
bdrv_enable_copy_on_read(bs);
}
for ( ; offset < s->common.len; offset += n) {
for ( ; offset < len; offset += n) {
bool copy;
/* Note that even when no rate limit is applied we need to yield
@ -159,7 +161,7 @@ static void coroutine_fn stream_run(void *opaque)
/* Finish early if end of backing file has been reached */
if (ret == 0 && n == 0) {
n = s->common.len - offset;
n = len - offset;
}
copy = (ret == 1);
@ -185,7 +187,7 @@ static void coroutine_fn stream_run(void *opaque)
ret = 0;
/* Publish progress */
s->common.offset += n;
block_job_progress_update(&s->common, n);
if (copy && s->common.speed) {
delay_ns = ratelimit_calculate_delay(&s->limit, n);
} else {

10
blockjob.c
View File

@ -810,6 +810,16 @@ int block_job_complete_sync(BlockJob *job, Error **errp)
return block_job_finish_sync(job, &block_job_complete, errp);
}
void block_job_progress_update(BlockJob *job, uint64_t done)
{
job->offset += done;
}
void block_job_progress_set_remaining(BlockJob *job, uint64_t remaining)
{
job->len = job->offset + remaining;
}
BlockJobInfo *block_job_query(BlockJob *job, Error **errp)
{
BlockJobInfo *info;

19
include/block/blockjob.h
View File

@ -277,6 +277,25 @@ void block_job_finalize(BlockJob *job, Error **errp);
*/
void block_job_dismiss(BlockJob **job, Error **errp);
/**
* block_job_progress_update:
* @job: The job that has made progress
* @done: How much progress the job made
*
* Updates the progress counter of the job.
*/
void block_job_progress_update(BlockJob *job, uint64_t done);
/**
* block_job_progress_set_remaining:
* @job: The job whose expected progress end value is set
* @remaining: Expected end value of the progress counter of the job
*
* Sets the expected end value of the progress counter of a job so that a
* completion percentage can be calculated when the progress is updated.
*/
void block_job_progress_set_remaining(BlockJob *job, uint64_t remaining);
/**
* block_job_query:
* @job: The job to get information about.