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[Qemu-devel] [PATCH 6/7] scsi-disk: introduce scsi_disk_req_check_error
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 6/7] scsi-disk: introduce scsi_disk_req_check_error |
Date: |
Mon, 23 May 2016 14:54:10 +0200 |
Commonize all the checks for canceled requests and errors. The next patch
will add another case to check for, in order to handle passthrough commands.
There is no semantic change here; the only nontrivial modification is in
scsi_write_do_fua, where cancellation has been checked earlier by both
callers. Thus, the check is replaced with an assertion.
Signed-off-by: Paolo Bonzini <address@hidden>
---
hw/scsi/scsi-disk.c | 89 +++++++++++++----------------------------------------
1 file changed, 22 insertions(+), 67 deletions(-)
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index f9870e9..f823781 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -179,6 +179,20 @@ static void scsi_disk_load_request(QEMUFile *f,
SCSIRequest *req)
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
}
+static bool scsi_disk_req_check_error(SCSIDiskReq *r, int ret, bool
acct_failed)
+{
+ if (r->req.io_canceled) {
+ scsi_req_cancel_complete(&r->req);
+ return true;
+ }
+
+ if (ret < 0) {
+ return scsi_handle_rw_error(r, -ret, acct_failed);
+ }
+
+ return false;
+}
+
static void scsi_aio_complete(void *opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
@@ -186,17 +200,10 @@ static void scsi_aio_complete(void *opaque, int ret)
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, true)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, true)) {
- goto done;
- }
- }
-
block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
scsi_req_complete(&r->req, GOOD);
@@ -235,11 +242,7 @@ static void scsi_write_do_fua(SCSIDiskReq *r)
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
assert(r->req.aiocb == NULL);
-
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
- goto done;
- }
+ assert(!r->req.io_canceled);
if (r->need_fua_emulation) {
block_acct_start(blk_get_stats(s->qdev.conf.blk), &r->acct, 0,
@@ -249,26 +252,16 @@ static void scsi_write_do_fua(SCSIDiskReq *r)
}
scsi_req_complete(&r->req, GOOD);
-
-done:
scsi_req_unref(&r->req);
}
static void scsi_dma_complete_noio(SCSIDiskReq *r, int ret)
{
assert(r->req.aiocb == NULL);
-
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, false)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, false)) {
- goto done;
- }
- }
-
r->sector += r->sector_count;
r->sector_count = 0;
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
@@ -306,17 +299,10 @@ static void scsi_read_complete(void * opaque, int ret)
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, true)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, true)) {
- goto done;
- }
- }
-
block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->qiov.size);
@@ -336,18 +322,10 @@ static void scsi_do_read(SCSIDiskReq *r, int ret)
SCSIDiskClass *sdc = (SCSIDiskClass *) object_get_class(OBJECT(s));
assert (r->req.aiocb == NULL);
-
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, false)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, false)) {
- goto done;
- }
- }
-
/* The request is used as the AIO opaque value, so add a ref. */
scsi_req_ref(&r->req);
@@ -475,18 +453,10 @@ static void scsi_write_complete_noio(SCSIDiskReq *r, int
ret)
uint32_t n;
assert (r->req.aiocb == NULL);
-
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, false)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, false)) {
- goto done;
- }
- }
-
n = r->qiov.size / 512;
r->sector += n;
r->sector_count -= n;
@@ -1621,18 +1591,10 @@ static void scsi_unmap_complete_noio(UnmapCBData *data,
int ret)
uint32_t nb_sectors;
assert(r->req.aiocb == NULL);
-
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, false)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, false)) {
- goto done;
- }
- }
-
if (data->count > 0) {
sector_num = ldq_be_p(&data->inbuf[0]);
nb_sectors = ldl_be_p(&data->inbuf[8]) & 0xffffffffULL;
@@ -1732,17 +1694,10 @@ static void scsi_write_same_complete(void *opaque, int
ret)
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
- if (r->req.io_canceled) {
- scsi_req_cancel_complete(&r->req);
+ if (scsi_disk_req_check_error(r, ret, true)) {
goto done;
}
- if (ret < 0) {
- if (scsi_handle_rw_error(r, -ret, true)) {
- goto done;
- }
- }
-
block_acct_done(blk_get_stats(s->qdev.conf.blk), &r->acct);
data->nb_sectors -= data->iov.iov_len / 512;
--
2.5.5
- Re: [Qemu-devel] [PATCH 2/7] dma-helpers: change BlockBackend to opaque value in DMAIOFunc, (continued)
- [Qemu-devel] [PATCH 5/7] scsi-disk: add need_fua_emulation to SCSIDiskClass, Paolo Bonzini, 2016/05/23
- [Qemu-devel] [PATCH 4/7] scsi-disk: introduce dma_readv and dma_writev, Paolo Bonzini, 2016/05/23
- [Qemu-devel] [PATCH 1/7] dma-helpers: change interface to byte-based, Paolo Bonzini, 2016/05/23
- [Qemu-devel] [PATCH 6/7] scsi-disk: introduce scsi_disk_req_check_error,
Paolo Bonzini <=
- [Qemu-devel] [PATCH 3/7] scsi-disk: introduce a common base class, Paolo Bonzini, 2016/05/23
- [Qemu-devel] [PATCH 7/7] scsi-block: always use SG_IO, Paolo Bonzini, 2016/05/23
- Re: [Qemu-devel] [PATCH v2 0/7] dma-helpers, scsi-block: use SG_IO for all I/O on scsi-block, Mark Cave-Ayland, 2016/05/23