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blockjobs: Allow creating internal jobs 

Add the ability to create jobs without an ID.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Message-id: 1477584421-1399-3-git-send-email-jsnow@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
This commit is contained in:
John Snow 2016-10-27 12:06:56 -04:00 committed by Jeff Cody
parent 559b935f8c
commit f81e0b4532
8 changed files with 30 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block/backup.c
View File

@ -612,7 +612,7 @@ void backup_start(const char *job_id, BlockDriverState *bs,
}
job = block_job_create(job_id, &backup_job_driver, bs, speed,
cb, opaque, errp);
BLOCK_JOB_DEFAULT, cb, opaque, errp);
if (!job) {
goto error;
}

2
block/commit.c
View File

@ -234,7 +234,7 @@ void commit_start(const char *job_id, BlockDriverState *bs,
}
s = block_job_create(job_id, &commit_job_driver, bs, speed,
cb, opaque, errp);
BLOCK_JOB_DEFAULT, cb, opaque, errp);
if (!s) {
return;
}

3
block/mirror.c
View File

@ -967,7 +967,8 @@ static void mirror_start_job(const char *job_id, BlockDriverState *bs,
buf_size = DEFAULT_MIRROR_BUF_SIZE;
}
s = block_job_create(job_id, driver, bs, speed, cb, opaque, errp);
s = block_job_create(job_id, driver, bs, speed,
BLOCK_JOB_DEFAULT, cb, opaque, errp);
if (!s) {
return;
}

2
block/stream.c
View File

@ -230,7 +230,7 @@ void stream_start(const char *job_id, BlockDriverState *bs,
int orig_bs_flags;
s = block_job_create(job_id, &stream_job_driver, bs, speed,
cb, opaque, errp);
BLOCK_JOB_DEFAULT, cb, opaque, errp);
if (!s) {
return;
}

25
blockjob.c
View File

@ -121,7 +121,7 @@ void block_job_add_bdrv(BlockJob *job, BlockDriverState *bs)
}
void *block_job_create(const char *job_id, const BlockJobDriver *driver,
BlockDriverState *bs, int64_t speed,
BlockDriverState *bs, int64_t speed, int flags,
BlockCompletionFunc *cb, void *opaque, Error **errp)
{
BlockBackend *blk;
@ -133,7 +133,7 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver,
return NULL;
}
if (job_id == NULL) {
if (job_id == NULL && !(flags & BLOCK_JOB_INTERNAL)) {
job_id = bdrv_get_device_name(bs);
if (!*job_id) {
error_setg(errp, "An explicit job ID is required for this node");
@ -141,14 +141,21 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver,
}
}
if (!id_wellformed(job_id)) {
error_setg(errp, "Invalid job ID '%s'", job_id);
return NULL;
}
if (job_id) {
if (flags & BLOCK_JOB_INTERNAL) {
error_setg(errp, "Cannot specify job ID for internal block job");
return NULL;
}
if (block_job_get(job_id)) {
error_setg(errp, "Job ID '%s' already in use", job_id);
return NULL;
if (!id_wellformed(job_id)) {
error_setg(errp, "Invalid job ID '%s'", job_id);
return NULL;
}
if (block_job_get(job_id)) {
error_setg(errp, "Job ID '%s' already in use", job_id);
return NULL;
}
}
blk = blk_new();

7
include/block/blockjob.h
View File

@ -210,6 +210,11 @@ struct BlockJob {
QLIST_ENTRY(BlockJob) txn_list;
};
typedef enum BlockJobCreateFlags {
BLOCK_JOB_DEFAULT = 0x00,
BLOCK_JOB_INTERNAL = 0x01,
} BlockJobCreateFlags;
/**
* block_job_next:
* @job: A block job, or %NULL.
@ -252,7 +257,7 @@ BlockJob *block_job_get(const char *id);
* called from a wrapper that is specific to the job type.
*/
void *block_job_create(const char *job_id, const BlockJobDriver *driver,
BlockDriverState *bs, int64_t speed,
BlockDriverState *bs, int64_t speed, int flags,
BlockCompletionFunc *cb, void *opaque, Error **errp);
/**

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

@ -98,7 +98,8 @@ static BlockJob *test_block_job_start(unsigned int iterations,
bs = bdrv_new();
snprintf(job_id, sizeof(job_id), "job%u", counter++);
s = block_job_create(job_id, &test_block_job_driver, bs, 0,
test_block_job_cb, data, &error_abort);
BLOCK_JOB_DEFAULT, test_block_job_cb,
data, &error_abort);
s->iterations = iterations;
s->use_timer = use_timer;
s->rc = rc;

2
tests/test-blockjob.c
View File

@ -31,7 +31,7 @@ static BlockJob *do_test_id(BlockBackend *blk, const char *id,
Error *errp = NULL;
job = block_job_create(id, &test_block_job_driver, blk_bs(blk), 0,
block_job_cb, NULL, &errp);
BLOCK_JOB_DEFAULT, block_job_cb, NULL, &errp);
if (should_succeed) {
g_assert_null(errp);
g_assert_nonnull(job);