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authorStefan Hajnoczi <stefanha@redhat.com>2017-12-06 14:45:45 +0000
committerStefan Hajnoczi <stefanha@redhat.com>2017-12-19 10:25:08 +0000
commitedd5adeecddf665e7954bc146ff458bb30f178ae (patch)
tree3d6eed04572c3dd15932f6ddd5c705212d35e7bc /blockdev.c
parent66d56054bca3c1c45861d18ea97f147f7d376d21 (diff)
downloadqemu-edd5adeecddf665e7954bc146ff458bb30f178ae.zip
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block: don't keep AioContext acquired after blockdev_backup_prepare()
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20171206144550.22295-5-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'blockdev.c')
-rw-r--r--blockdev.c44
1 files changed, 34 insertions, 10 deletions
diff --git a/blockdev.c b/blockdev.c
index 5a56a1a..d7ad764 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1936,7 +1936,6 @@ typedef struct BlockdevBackupState {
BlkActionState common;
BlockDriverState *bs;
BlockJob *job;
- AioContext *aio_context;
} BlockdevBackupState;
static BlockJob *do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn,
@@ -1947,6 +1946,7 @@ static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
BlockdevBackup *backup;
BlockDriverState *bs, *target;
+ AioContext *aio_context;
Error *local_err = NULL;
assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
@@ -1962,29 +1962,39 @@ static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
return;
}
- /* AioContext is released in .clean() */
- state->aio_context = bdrv_get_aio_context(bs);
- if (state->aio_context != bdrv_get_aio_context(target)) {
- state->aio_context = NULL;
+ aio_context = bdrv_get_aio_context(bs);
+ if (aio_context != bdrv_get_aio_context(target)) {
error_setg(errp, "Backup between two IO threads is not implemented");
return;
}
- aio_context_acquire(state->aio_context);
+ aio_context_acquire(aio_context);
state->bs = bs;
+
+ /* Paired with .clean() */
bdrv_drained_begin(state->bs);
state->job = do_blockdev_backup(backup, common->block_job_txn, &local_err);
if (local_err) {
error_propagate(errp, local_err);
- return;
+ goto out;
}
+
+out:
+ aio_context_release(aio_context);
}
static void blockdev_backup_commit(BlkActionState *common)
{
BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
+ AioContext *aio_context;
+
+ aio_context = bdrv_get_aio_context(state->bs);
+ aio_context_acquire(aio_context);
+
assert(state->job);
block_job_start(state->job);
+
+ aio_context_release(aio_context);
}
static void blockdev_backup_abort(BlkActionState *common)
@@ -1992,18 +2002,32 @@ static void blockdev_backup_abort(BlkActionState *common)
BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
if (state->job) {
+ AioContext *aio_context;
+
+ aio_context = bdrv_get_aio_context(state->bs);
+ aio_context_acquire(aio_context);
+
block_job_cancel_sync(state->job);
+
+ aio_context_release(aio_context);
}
}
static void blockdev_backup_clean(BlkActionState *common)
{
BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
+ AioContext *aio_context;
- if (state->aio_context) {
- bdrv_drained_end(state->bs);
- aio_context_release(state->aio_context);
+ if (!state->bs) {
+ return;
}
+
+ aio_context = bdrv_get_aio_context(state->bs);
+ aio_context_acquire(aio_context);
+
+ bdrv_drained_end(state->bs);
+
+ aio_context_release(aio_context);
}
typedef struct BlockDirtyBitmapState {