diff options
Diffstat (limited to 'block/iscsi.c')
| -rw-r--r-- | block/iscsi.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/block/iscsi.c b/block/iscsi.c index 1924a2b58e..abb872d3d9 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -124,6 +124,7 @@ typedef struct IscsiAIOCB { #ifdef __linux__ sg_io_hdr_t *ioh; #endif + bool cancelled; } IscsiAIOCB; /* libiscsi uses time_t so its enough to process events every second */ @@ -287,6 +288,7 @@ static void iscsi_co_init_iscsitask(IscsiLun *iscsilun, struct IscsiTask *iTask) }; } +/* Called (via iscsi_service) with QemuMutex held. */ static void iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data) @@ -295,6 +297,7 @@ iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data, acb->status = -ECANCELED; iscsi_schedule_bh(acb); + qemu_aio_unref(acb); /* acquired in iscsi_aio_cancel() */ } static void @@ -303,14 +306,25 @@ iscsi_aio_cancel(BlockAIOCB *blockacb) IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; IscsiLun *iscsilun = acb->iscsilun; - if (acb->status != -EINPROGRESS) { + qemu_mutex_lock(&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; } + acb->cancelled = true; + + qemu_aio_ref(acb); /* released in iscsi_abort_task_cb() */ + /* send a task mgmt call to the target to cancel the task on the target */ - iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task, - iscsi_abort_task_cb, acb); + if (iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task, + 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 = { @@ -1008,6 +1022,7 @@ static BlockAIOCB *iscsi_aio_ioctl(BlockDriverState *bs, acb->bh = NULL; acb->status = -EINPROGRESS; acb->ioh = buf; + acb->cancelled = false; if (req != SG_IO) { iscsi_ioctl_handle_emulated(acb, req, buf); |