forked from rpms/qemu-kvm
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
177 lines
6.3 KiB
177 lines
6.3 KiB
From 0a4f5bcc2a6f8ac31431e971c1dce9e6ab2191c2 Mon Sep 17 00:00:00 2001
|
|
From: Stefan Hajnoczi <stefanha@redhat.com>
|
|
Date: Tue, 21 Feb 2023 16:22:16 -0500
|
|
Subject: [PATCH 01/12] scsi: protect req->aiocb with AioContext lock
|
|
|
|
RH-Author: Stefan Hajnoczi <stefanha@redhat.com>
|
|
RH-MergeRequest: 155: virtio-scsi: reset SCSI devices from main loop thread
|
|
RH-Bugzilla: 2155748
|
|
RH-Acked-by: Eric Blake <eblake@redhat.com>
|
|
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
|
|
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
|
|
RH-Commit: [1/3] 61727297bd31dfe18220b61f1d265ced0649c60d (stefanha/centos-stream-qemu-kvm)
|
|
|
|
If requests are being processed in the IOThread when a SCSIDevice is
|
|
unplugged, scsi_device_purge_requests() -> scsi_req_cancel_async() races
|
|
with I/O completion callbacks. Both threads load and store req->aiocb.
|
|
This can lead to assert(r->req.aiocb == NULL) failures and undefined
|
|
behavior.
|
|
|
|
Protect r->req.aiocb with the AioContext lock to prevent the race.
|
|
|
|
Reviewed-by: Eric Blake <eblake@redhat.com>
|
|
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
|
|
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
Message-Id: <20230221212218.1378734-2-stefanha@redhat.com>
|
|
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
|
|
(cherry picked from commit 7b7fc3d0102dafe8eb44802493036a526e921a71)
|
|
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
---
|
|
hw/scsi/scsi-disk.c | 23 ++++++++++++++++-------
|
|
hw/scsi/scsi-generic.c | 11 ++++++-----
|
|
2 files changed, 22 insertions(+), 12 deletions(-)
|
|
|
|
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
|
|
index e493c28814..5327f93f4c 100644
|
|
--- a/hw/scsi/scsi-disk.c
|
|
+++ b/hw/scsi/scsi-disk.c
|
|
@@ -273,9 +273,11 @@ static void scsi_aio_complete(void *opaque, int ret)
|
|
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
|
|
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
|
|
|
|
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
+
|
|
assert(r->req.aiocb != NULL);
|
|
r->req.aiocb = NULL;
|
|
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
+
|
|
if (scsi_disk_req_check_error(r, ret, true)) {
|
|
goto done;
|
|
}
|
|
@@ -357,10 +359,11 @@ static void scsi_dma_complete(void *opaque, int ret)
|
|
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
|
|
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
|
|
|
|
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
+
|
|
assert(r->req.aiocb != NULL);
|
|
r->req.aiocb = NULL;
|
|
|
|
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
if (ret < 0) {
|
|
block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
|
|
} else {
|
|
@@ -393,10 +396,11 @@ static void scsi_read_complete(void *opaque, int ret)
|
|
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
|
|
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
|
|
|
|
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
+
|
|
assert(r->req.aiocb != NULL);
|
|
r->req.aiocb = NULL;
|
|
|
|
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
if (ret < 0) {
|
|
block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
|
|
} else {
|
|
@@ -446,10 +450,11 @@ static void scsi_do_read_cb(void *opaque, int ret)
|
|
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
|
|
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
|
|
|
|
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
+
|
|
assert (r->req.aiocb != NULL);
|
|
r->req.aiocb = NULL;
|
|
|
|
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
if (ret < 0) {
|
|
block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
|
|
} else {
|
|
@@ -530,10 +535,11 @@ static void scsi_write_complete(void * opaque, int ret)
|
|
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
|
|
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
|
|
|
|
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
+
|
|
assert (r->req.aiocb != NULL);
|
|
r->req.aiocb = NULL;
|
|
|
|
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
if (ret < 0) {
|
|
block_acct_failed(blk_get_stats(s->qdev.conf.blk), &r->acct);
|
|
} else {
|
|
@@ -1737,10 +1743,11 @@ static void scsi_unmap_complete(void *opaque, int ret)
|
|
SCSIDiskReq *r = data->r;
|
|
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
|
|
|
|
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
+
|
|
assert(r->req.aiocb != NULL);
|
|
r->req.aiocb = NULL;
|
|
|
|
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
if (scsi_disk_req_check_error(r, ret, true)) {
|
|
scsi_req_unref(&r->req);
|
|
g_free(data);
|
|
@@ -1816,9 +1823,11 @@ static void scsi_write_same_complete(void *opaque, int ret)
|
|
SCSIDiskReq *r = data->r;
|
|
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
|
|
|
|
+ aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
+
|
|
assert(r->req.aiocb != NULL);
|
|
r->req.aiocb = NULL;
|
|
- aio_context_acquire(blk_get_aio_context(s->qdev.conf.blk));
|
|
+
|
|
if (scsi_disk_req_check_error(r, ret, true)) {
|
|
goto done;
|
|
}
|
|
diff --git a/hw/scsi/scsi-generic.c b/hw/scsi/scsi-generic.c
|
|
index 92cce20a4d..ac9fa662b4 100644
|
|
--- a/hw/scsi/scsi-generic.c
|
|
+++ b/hw/scsi/scsi-generic.c
|
|
@@ -111,10 +111,11 @@ static void scsi_command_complete(void *opaque, int ret)
|
|
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
|
|
SCSIDevice *s = r->req.dev;
|
|
|
|
+ aio_context_acquire(blk_get_aio_context(s->conf.blk));
|
|
+
|
|
assert(r->req.aiocb != NULL);
|
|
r->req.aiocb = NULL;
|
|
|
|
- aio_context_acquire(blk_get_aio_context(s->conf.blk));
|
|
scsi_command_complete_noio(r, ret);
|
|
aio_context_release(blk_get_aio_context(s->conf.blk));
|
|
}
|
|
@@ -269,11 +270,11 @@ static void scsi_read_complete(void * opaque, int ret)
|
|
SCSIDevice *s = r->req.dev;
|
|
int len;
|
|
|
|
+ aio_context_acquire(blk_get_aio_context(s->conf.blk));
|
|
+
|
|
assert(r->req.aiocb != NULL);
|
|
r->req.aiocb = NULL;
|
|
|
|
- aio_context_acquire(blk_get_aio_context(s->conf.blk));
|
|
-
|
|
if (ret || r->req.io_canceled) {
|
|
scsi_command_complete_noio(r, ret);
|
|
goto done;
|
|
@@ -386,11 +387,11 @@ static void scsi_write_complete(void * opaque, int ret)
|
|
|
|
trace_scsi_generic_write_complete(ret);
|
|
|
|
+ aio_context_acquire(blk_get_aio_context(s->conf.blk));
|
|
+
|
|
assert(r->req.aiocb != NULL);
|
|
r->req.aiocb = NULL;
|
|
|
|
- aio_context_acquire(blk_get_aio_context(s->conf.blk));
|
|
-
|
|
if (ret || r->req.io_canceled) {
|
|
scsi_command_complete_noio(r, ret);
|
|
goto done;
|
|
--
|
|
2.39.1
|
|
|