| Message ID | 20201109154327.325675-5-ganqixin@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Use lock guard macros in block | expand |
Am 09.11.2020 um 16:43 hat Gan Qixin geschrieben: > Replace manual lock()/unlock() calls with lock guard macros > (QEMU_LOCK_GUARD/WITH_QEMU_LOCK_GUARD) in block/iscsi.c. > > Signed-off-by: Gan Qixin <ganqixin@huawei.com> > --- > block/iscsi.c | 28 +++++++++++++--------------- > 1 file changed, 13 insertions(+), 15 deletions(-) > > diff --git a/block/iscsi.c b/block/iscsi.c > index e30a7e3606..f5f657b582 100644 > --- a/block/iscsi.c > +++ b/block/iscsi.c > @@ -322,7 +322,7 @@ iscsi_aio_cancel(BlockAIOCB *blockacb) > IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; > IscsiLun *iscsilun = acb->iscsilun; > > - qemu_mutex_lock(&iscsilun->mutex); > + QEMU_LOCK_GUARD(&iscsilun->mutex); > > /* If it was cancelled or completed already, our work is done here */ > if (acb->cancelled || acb->status != -EINPROGRESS) { qemu_mutex_unlock(&iscsilun->mutex); return; } I don't think this qemu_mutex_unlock() is right any more now. Kevin
> -----Original Message----- > From: Kevin Wolf [mailto:kwolf@redhat.com] > Sent: Wednesday, December 2, 2020 7:12 PM > To: ganqixin <ganqixin@huawei.com> > Cc: qemu-devel@nongnu.org; qemu-trivial@nongnu.org; > pbonzini@redhat.com; mreitz@redhat.com; stefanha@redhat.com; > dnbrdsky@gmail.com; Zhanghailiang <zhang.zhanghailiang@huawei.com>; > Chenqun (kuhn) <kuhn.chenqun@huawei.com> > Subject: Re: [PATCH 4/4] block/iscsi.c: Use lock guard macros > > Am 09.11.2020 um 16:43 hat Gan Qixin geschrieben: > > Replace manual lock()/unlock() calls with lock guard macros > > (QEMU_LOCK_GUARD/WITH_QEMU_LOCK_GUARD) in block/iscsi.c. > > > > Signed-off-by: Gan Qixin <ganqixin@huawei.com> > > --- > > block/iscsi.c | 28 +++++++++++++--------------- > > 1 file changed, 13 insertions(+), 15 deletions(-) > > > > diff --git a/block/iscsi.c b/block/iscsi.c index > > e30a7e3606..f5f657b582 100644 > > --- a/block/iscsi.c > > +++ b/block/iscsi.c > > @@ -322,7 +322,7 @@ iscsi_aio_cancel(BlockAIOCB *blockacb) > > IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; > > IscsiLun *iscsilun = acb->iscsilun; > > > > - qemu_mutex_lock(&iscsilun->mutex); > > + QEMU_LOCK_GUARD(&iscsilun->mutex); > > > > /* If it was cancelled or completed already, our work is done here */ > > if (acb->cancelled || acb->status != -EINPROGRESS) { > qemu_mutex_unlock(&iscsilun->mutex); > return; > } > > I don't think this qemu_mutex_unlock() is right any more now. You are right, I ignored this qemu_mutex_unlock(). I will correct it and resubmit. :) Thanks, Gan Qixin > > Kevin
diff --git a/block/iscsi.c b/block/iscsi.c index e30a7e3606..f5f657b582 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -322,7 +322,7 @@ iscsi_aio_cancel(BlockAIOCB *blockacb) IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; IscsiLun *iscsilun = acb->iscsilun; - qemu_mutex_lock(&iscsilun->mutex); + QEMU_LOCK_GUARD(&iscsilun->mutex); /* If it was cancelled or completed already, our work is done here */ if (acb->cancelled || acb->status != -EINPROGRESS) { @@ -339,8 +339,6 @@ iscsi_aio_cancel(BlockAIOCB *blockacb) iscsi_abort_task_cb, acb) < 0) { qemu_aio_unref(acb); /* since iscsi_abort_task_cb() won't be called */ } - - qemu_mutex_unlock(&iscsilun->mutex); } static const AIOCBInfo iscsi_aiocb_info = { @@ -375,22 +373,22 @@ static void iscsi_timed_check_events(void *opaque) { IscsiLun *iscsilun = opaque; - qemu_mutex_lock(&iscsilun->mutex); + WITH_QEMU_LOCK_GUARD(&iscsilun->mutex) { + /* check for timed out requests */ + iscsi_service(iscsilun->iscsi, 0); - /* check for timed out requests */ - iscsi_service(iscsilun->iscsi, 0); + if (iscsilun->request_timed_out) { + iscsilun->request_timed_out = false; + iscsi_reconnect(iscsilun->iscsi); + } - if (iscsilun->request_timed_out) { - iscsilun->request_timed_out = false; - iscsi_reconnect(iscsilun->iscsi); + /* + * newer versions of libiscsi may return zero events. Ensure we are + * able to return to service once this situation changes. + */ + iscsi_set_events(iscsilun); } - /* newer versions of libiscsi may return zero events. Ensure we are able - * to return to service once this situation changes. */ - iscsi_set_events(iscsilun); - - qemu_mutex_unlock(&iscsilun->mutex); - timer_mod(iscsilun->event_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + EVENT_INTERVAL); }
Replace manual lock()/unlock() calls with lock guard macros (QEMU_LOCK_GUARD/WITH_QEMU_LOCK_GUARD) in block/iscsi.c. Signed-off-by: Gan Qixin <ganqixin@huawei.com> --- block/iscsi.c | 28 +++++++++++++--------------- 1 file changed, 13 insertions(+), 15 deletions(-)