From d5776465ee9a55815792efa34d79de240f4ffd99 Mon Sep 17 00:00:00 2001 From: Fam Zheng Date: Thu, 25 Sep 2014 10:20:47 +0800 Subject: scsi: Introduce scsi_req_cancel_complete Let the aio cb do the clean up and notification job after scsi_req_cancel, in preparation for asynchronous cancellation. Signed-off-by: Fam Zheng Signed-off-by: Paolo Bonzini --- hw/scsi/scsi-bus.c | 14 ++++++++++---- hw/scsi/scsi-disk.c | 8 ++++++++ hw/scsi/scsi-generic.c | 1 + include/hw/scsi/scsi.h | 1 + 4 files changed, 20 insertions(+), 4 deletions(-) diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c index 764f6cf3b5..c91db63696 100644 --- a/hw/scsi/scsi-bus.c +++ b/hw/scsi/scsi-bus.c @@ -1718,6 +1718,16 @@ void scsi_req_complete(SCSIRequest *req, int status) scsi_req_unref(req); } +/* Called by the devices when the request is canceled. */ +void scsi_req_cancel_complete(SCSIRequest *req) +{ + assert(req->io_canceled); + if (req->bus->info->cancel) { + req->bus->info->cancel(req); + } + scsi_req_unref(req); +} + void scsi_req_cancel(SCSIRequest *req) { trace_scsi_req_cancel(req->dev->id, req->lun, req->tag); @@ -1730,10 +1740,6 @@ void scsi_req_cancel(SCSIRequest *req) if (req->aiocb) { bdrv_aio_cancel(req->aiocb); } - if (req->bus->info->cancel) { - req->bus->info->cancel(req); - } - scsi_req_unref(req); } static int scsi_ua_precedence(SCSISense sense) diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c index ef13e66160..7a7938a5bf 100644 --- a/hw/scsi/scsi-disk.c +++ b/hw/scsi/scsi-disk.c @@ -168,6 +168,7 @@ static void scsi_aio_complete(void *opaque, int ret) r->req.aiocb = NULL; block_acct_done(bdrv_get_stats(s->qdev.conf.bs), &r->acct); if (r->req.io_canceled) { + scsi_req_cancel_complete(&r->req); goto done; } @@ -214,6 +215,7 @@ static void scsi_write_do_fua(SCSIDiskReq *r) SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); if (r->req.io_canceled) { + scsi_req_cancel_complete(&r->req); goto done; } @@ -240,6 +242,7 @@ static void scsi_dma_complete_noio(void *opaque, int ret) block_acct_done(bdrv_get_stats(s->qdev.conf.bs), &r->acct); } if (r->req.io_canceled) { + scsi_req_cancel_complete(&r->req); goto done; } @@ -280,6 +283,7 @@ static void scsi_read_complete(void * opaque, int ret) r->req.aiocb = NULL; block_acct_done(bdrv_get_stats(s->qdev.conf.bs), &r->acct); if (r->req.io_canceled) { + scsi_req_cancel_complete(&r->req); goto done; } @@ -312,6 +316,7 @@ static void scsi_do_read(void *opaque, int ret) block_acct_done(bdrv_get_stats(s->qdev.conf.bs), &r->acct); } if (r->req.io_canceled) { + scsi_req_cancel_complete(&r->req); goto done; } @@ -432,6 +437,7 @@ static void scsi_write_complete(void * opaque, int ret) block_acct_done(bdrv_get_stats(s->qdev.conf.bs), &r->acct); } if (r->req.io_canceled) { + scsi_req_cancel_complete(&r->req); goto done; } @@ -1524,6 +1530,7 @@ static void scsi_unmap_complete(void *opaque, int ret) r->req.aiocb = NULL; if (r->req.io_canceled) { + scsi_req_cancel_complete(&r->req); goto done; } @@ -1623,6 +1630,7 @@ static void scsi_write_same_complete(void *opaque, int ret) r->req.aiocb = NULL; block_acct_done(bdrv_get_stats(s->qdev.conf.bs), &r->acct); if (r->req.io_canceled) { + scsi_req_cancel_complete(&r->req); goto done; } diff --git a/hw/scsi/scsi-generic.c b/hw/scsi/scsi-generic.c index 7e85047d7c..01bca084e6 100644 --- a/hw/scsi/scsi-generic.c +++ b/hw/scsi/scsi-generic.c @@ -94,6 +94,7 @@ static void scsi_command_complete(void *opaque, int ret) r->req.aiocb = NULL; if (r->req.io_canceled) { + scsi_req_cancel_complete(&r->req); goto done; } if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) { diff --git a/include/hw/scsi/scsi.h b/include/hw/scsi/scsi.h index 0290873120..2127a335ba 100644 --- a/include/hw/scsi/scsi.h +++ b/include/hw/scsi/scsi.h @@ -264,6 +264,7 @@ void scsi_req_data(SCSIRequest *req, int len); void scsi_req_complete(SCSIRequest *req, int status); uint8_t *scsi_req_get_buf(SCSIRequest *req); int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len); +void scsi_req_cancel_complete(SCSIRequest *req); void scsi_req_cancel(SCSIRequest *req); void scsi_req_retry(SCSIRequest *req); void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense); -- cgit v1.2.3