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Tue, 19 Dec 2017 15:12:46 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL v2 09/23] block: don't keep AioContext acquired after drive_backup_prepare() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Signed-off-by: Stefan Hajnoczi Reviewed-by: Kevin Wolf Reviewed-by: Eric Blake Message-id: 20171206144550.22295-4-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi --- blockdev.c | 42 ++++++++++++++++++++++++++++++++++-------- 1 file changed, 34 insertions(+), 8 deletions(-) diff --git a/blockdev.c b/blockdev.c index 3b598f8f0e..5a56a1abf2 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1845,7 +1845,6 @@ static void external_snapshot_clean(BlkActionState *c= ommon) typedef struct DriveBackupState { BlkActionState common; BlockDriverState *bs; - AioContext *aio_context; BlockJob *job; } DriveBackupState; =20 @@ -1857,6 +1856,7 @@ static void drive_backup_prepare(BlkActionState *comm= on, Error **errp) DriveBackupState *state =3D DO_UPCAST(DriveBackupState, common, common= ); BlockDriverState *bs; DriveBackup *backup; + AioContext *aio_context; Error *local_err =3D NULL; =20 assert(common->action->type =3D=3D TRANSACTION_ACTION_KIND_DRIVE_BACKU= P); @@ -1867,24 +1867,36 @@ static void drive_backup_prepare(BlkActionState *co= mmon, Error **errp) return; } =20 - /* AioContext is released in .clean() */ - state->aio_context =3D bdrv_get_aio_context(bs); - aio_context_acquire(state->aio_context); + aio_context =3D bdrv_get_aio_context(bs); + aio_context_acquire(aio_context); + + /* Paired with .clean() */ bdrv_drained_begin(bs); + state->bs =3D bs; =20 state->job =3D do_drive_backup(backup, common->block_job_txn, &local_e= rr); if (local_err) { error_propagate(errp, local_err); - return; + goto out; } + +out: + aio_context_release(aio_context); } =20 static void drive_backup_commit(BlkActionState *common) { DriveBackupState *state =3D DO_UPCAST(DriveBackupState, common, common= ); + AioContext *aio_context; + + aio_context =3D bdrv_get_aio_context(state->bs); + aio_context_acquire(aio_context); + assert(state->job); block_job_start(state->job); + + aio_context_release(aio_context); } =20 static void drive_backup_abort(BlkActionState *common) @@ -1892,18 +1904,32 @@ static void drive_backup_abort(BlkActionState *comm= on) DriveBackupState *state =3D DO_UPCAST(DriveBackupState, common, common= ); =20 if (state->job) { + AioContext *aio_context; + + aio_context =3D bdrv_get_aio_context(state->bs); + aio_context_acquire(aio_context); + block_job_cancel_sync(state->job); + + aio_context_release(aio_context); } } =20 static void drive_backup_clean(BlkActionState *common) { DriveBackupState *state =3D DO_UPCAST(DriveBackupState, common, common= ); + AioContext *aio_context; =20 - if (state->aio_context) { - bdrv_drained_end(state->bs); - aio_context_release(state->aio_context); + if (!state->bs) { + return; } + + aio_context =3D bdrv_get_aio_context(state->bs); + aio_context_acquire(aio_context); + + bdrv_drained_end(state->bs); + + aio_context_release(aio_context); } =20 typedef struct BlockdevBackupState { --=20 2.14.3