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Synchronization with qemu-kvm-5.2.0-7.el8

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This commit is contained in:
Miroslav Rezanina 2021-02-18 08:11:01 +01:00
parent c7f7ddb9f2
commit cd9fb661b4
7 changed files with 879 additions and 1 deletions
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96
kvm-block-Avoid-processing-BDS-twice-in-bdrv_set_aio_con.patch Normal file
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@ -0,0 +1,96 @@
From 0db52fa2553ba83454a347e0aca4896e1b0d9b41 Mon Sep 17 00:00:00 2001
From: Sergio Lopez Pascual <slp@redhat.com>
Date: Thu, 11 Feb 2021 14:42:06 -0300
Subject: [PATCH 4/6] block: Avoid processing BDS twice in
bdrv_set_aio_context_ignore()
RH-Author: Sergio Lopez Pascual <slp@redhat.com>
Message-id: <20210211144208.58930-4-slp@redhat.com>
Patchwork-id: 101050
O-Subject: [RHEL-AV-8.4.0 qemu-kvm PATCH 3/5] block: Avoid processing BDS twice in bdrv_set_aio_context_ignore()
Bugzilla: 1918966 1918968
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Eric Blake <eblake@redhat.com>
Some graphs may contain an indirect reference to the first BDS in the
chain that can be reached while walking it bottom->up from one its
children.
Doubling-processing of a BDS is especially problematic for the
aio_notifiers, as they might attempt to work on both the old and the
new AIO contexts.
To avoid this problem, add every child and parent to the ignore list
before actually processing them.
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Sergio Lopez <slp@redhat.com>
Message-Id: <20210201125032.44713-2-slp@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 722d8e73d65cb54f39d360ecb2147ac58f43c399)
Signed-off-by: Sergio Lopez <slp@redhat.com>
Signed-off-by: Eduardo Lima (Etrunko) <etrunko@redhat.com>
---
block.c | 34 +++++++++++++++++++++++++++-------
1 file changed, 27 insertions(+), 7 deletions(-)
diff --git a/block.c b/block.c
index f1cedac362..8bfa446f9c 100644
--- a/block.c
+++ b/block.c
@@ -6454,7 +6454,10 @@ void bdrv_set_aio_context_ignore(BlockDriverState *bs,
AioContext *new_context, GSList **ignore)
{
AioContext *old_context = bdrv_get_aio_context(bs);
- BdrvChild *child;
+ GSList *children_to_process = NULL;
+ GSList *parents_to_process = NULL;
+ GSList *entry;
+ BdrvChild *child, *parent;
g_assert(qemu_get_current_aio_context() == qemu_get_aio_context());
@@ -6469,16 +6472,33 @@ void bdrv_set_aio_context_ignore(BlockDriverState *bs,
continue;
}
*ignore = g_slist_prepend(*ignore, child);
- bdrv_set_aio_context_ignore(child->bs, new_context, ignore);
+ children_to_process = g_slist_prepend(children_to_process, child);
}
- QLIST_FOREACH(child, &bs->parents, next_parent) {
- if (g_slist_find(*ignore, child)) {
+
+ QLIST_FOREACH(parent, &bs->parents, next_parent) {
+ if (g_slist_find(*ignore, parent)) {
continue;
}
- assert(child->klass->set_aio_ctx);
- *ignore = g_slist_prepend(*ignore, child);
- child->klass->set_aio_ctx(child, new_context, ignore);
+ *ignore = g_slist_prepend(*ignore, parent);
+ parents_to_process = g_slist_prepend(parents_to_process, parent);
+ }
+
+ for (entry = children_to_process;
+ entry != NULL;
+ entry = g_slist_next(entry)) {
+ child = entry->data;
+ bdrv_set_aio_context_ignore(child->bs, new_context, ignore);
+ }
+ g_slist_free(children_to_process);
+
+ for (entry = parents_to_process;
+ entry != NULL;
+ entry = g_slist_next(entry)) {
+ parent = entry->data;
+ assert(parent->klass->set_aio_ctx);
+ parent->klass->set_aio_ctx(parent, new_context, ignore);
}
+ g_slist_free(parents_to_process);
bdrv_detach_aio_context(bs);
--
2.27.0

118
kvm-block-Honor-blk_set_aio_context-context-requirements.patch Normal file
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@ -0,0 +1,118 @@
From bc284d49a00a1a716b380c2245aa0b897a259a5d Mon Sep 17 00:00:00 2001
From: Sergio Lopez Pascual <slp@redhat.com>
Date: Thu, 11 Feb 2021 14:42:04 -0300
Subject: [PATCH 2/6] block: Honor blk_set_aio_context() context requirements
RH-Author: Sergio Lopez Pascual <slp@redhat.com>
Message-id: <20210211144208.58930-2-slp@redhat.com>
Patchwork-id: 101049
O-Subject: [RHEL-AV-8.4.0 qemu-kvm PATCH 1/5] block: Honor blk_set_aio_context() context requirements
Bugzilla: 1918966 1918968
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Eric Blake <eblake@redhat.com>
The documentation for bdrv_set_aio_context_ignore() states this:
* The caller must own the AioContext lock for the old AioContext of bs, but it
* must not own the AioContext lock for new_context (unless new_context is the
* same as the current context of bs).
As blk_set_aio_context() makes use of this function, this rule also
applies to it.
Fix all occurrences where this rule wasn't honored.
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Sergio Lopez <slp@redhat.com>
Message-Id: <20201214170519.223781-2-slp@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
(cherry picked from commit c7040ff64ec93ee925a81d3547db925fe7d1f1c0)
Signed-off-by: Sergio Lopez <slp@redhat.com>
Signed-off-by: Eduardo Lima (Etrunko) <etrunko@redhat.com>
---
hw/block/dataplane/virtio-blk.c | 4 ++++
hw/block/dataplane/xen-block.c | 7 ++++++-
hw/scsi/virtio-scsi.c | 6 ++++--
3 files changed, 14 insertions(+), 3 deletions(-)
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c
index 37499c5564..e9050c8987 100644
--- a/hw/block/dataplane/virtio-blk.c
+++ b/hw/block/dataplane/virtio-blk.c
@@ -172,6 +172,7 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev)
VirtIOBlockDataPlane *s = vblk->dataplane;
BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vblk)));
VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
+ AioContext *old_context;
unsigned i;
unsigned nvqs = s->conf->num_queues;
Error *local_err = NULL;
@@ -214,7 +215,10 @@ int virtio_blk_data_plane_start(VirtIODevice *vdev)
vblk->dataplane_started = true;
trace_virtio_blk_data_plane_start(s);
+ old_context = blk_get_aio_context(s->conf->conf.blk);
+ aio_context_acquire(old_context);
r = blk_set_aio_context(s->conf->conf.blk, s->ctx, &local_err);
+ aio_context_release(old_context);
if (r < 0) {
error_report_err(local_err);
goto fail_guest_notifiers;
diff --git a/hw/block/dataplane/xen-block.c b/hw/block/dataplane/xen-block.c
index 71c337c7b7..3675f8deaf 100644
--- a/hw/block/dataplane/xen-block.c
+++ b/hw/block/dataplane/xen-block.c
@@ -725,6 +725,7 @@ void xen_block_dataplane_start(XenBlockDataPlane *dataplane,
{
ERRP_GUARD();
XenDevice *xendev = dataplane->xendev;
+ AioContext *old_context;
unsigned int ring_size;
unsigned int i;
@@ -808,10 +809,14 @@ void xen_block_dataplane_start(XenBlockDataPlane *dataplane,
goto stop;
}
- aio_context_acquire(dataplane->ctx);
+ old_context = blk_get_aio_context(dataplane->blk);
+ aio_context_acquire(old_context);
/* If other users keep the BlockBackend in the iothread, that's ok */
blk_set_aio_context(dataplane->blk, dataplane->ctx, NULL);
+ aio_context_release(old_context);
+
/* Only reason for failure is a NULL channel */
+ aio_context_acquire(dataplane->ctx);
xen_device_set_event_channel_context(xendev, dataplane->event_channel,
dataplane->ctx, &error_abort);
aio_context_release(dataplane->ctx);
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 82c025146d..66bdda5473 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -821,6 +821,7 @@ static void virtio_scsi_hotplug(HotplugHandler *hotplug_dev, DeviceState *dev,
VirtIODevice *vdev = VIRTIO_DEVICE(hotplug_dev);
VirtIOSCSI *s = VIRTIO_SCSI(vdev);
SCSIDevice *sd = SCSI_DEVICE(dev);
+ AioContext *old_context;
int ret;
/* XXX: Remove this check once block backend is capable of handling
@@ -836,9 +837,10 @@ static void virtio_scsi_hotplug(HotplugHandler *hotplug_dev, DeviceState *dev,
if (blk_op_is_blocked(sd->conf.blk, BLOCK_OP_TYPE_DATAPLANE, errp)) {
return;
}
- virtio_scsi_acquire(s);
+ old_context = blk_get_aio_context(sd->conf.blk);
+ aio_context_acquire(old_context);
ret = blk_set_aio_context(sd->conf.blk, s->ctx, errp);
- virtio_scsi_release(s);
+ aio_context_release(old_context);
if (ret < 0) {
return;
}
--
2.27.0

101
kvm-block-move-blk_exp_close_all-to-qemu_cleanup.patch Normal file
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@ -0,0 +1,101 @@
From 661245e1baf416570295fad0db1fdd5ad8485e33 Mon Sep 17 00:00:00 2001
From: Sergio Lopez Pascual <slp@redhat.com>
Date: Thu, 11 Feb 2021 14:42:08 -0300
Subject: [PATCH 6/6] block: move blk_exp_close_all() to qemu_cleanup()
RH-Author: Sergio Lopez Pascual <slp@redhat.com>
Message-id: <20210211144208.58930-6-slp@redhat.com>
Patchwork-id: 101052
O-Subject: [RHEL-AV-8.4.0 qemu-kvm PATCH 5/5] block: move blk_exp_close_all() to qemu_cleanup()
Bugzilla: 1918966 1918968
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Eric Blake <eblake@redhat.com>
Move blk_exp_close_all() from bdrv_close() to qemu_cleanup(), before
bdrv_drain_all_begin().
Export drivers may have coroutines yielding at some point in the block
layer, so we need to shut them down before draining the block layer,
as otherwise they may get stuck blk_wait_while_drained().
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1900505
Signed-off-by: Sergio Lopez <slp@redhat.com>
Message-Id: <20210201125032.44713-3-slp@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 1895b977f9a69419ae45cfc25805f71efae32eaf)
Signed-off-by: Sergio Lopez <slp@redhat.com>
Signed-off-by: Eduardo Lima (Etrunko) <etrunko@redhat.com>
---
block.c | 1 -
qemu-nbd.c | 1 +
softmmu/vl.c | 9 +++++++++
storage-daemon/qemu-storage-daemon.c | 1 +
4 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/block.c b/block.c
index 8bfa446f9c..57c60efc7f 100644
--- a/block.c
+++ b/block.c
@@ -4472,7 +4472,6 @@ static void bdrv_close(BlockDriverState *bs)
void bdrv_close_all(void)
{
assert(job_next(NULL) == NULL);
- blk_exp_close_all();
/* Drop references from requests still in flight, such as canceled block
* jobs whose AIO context has not been polled yet */
diff --git a/qemu-nbd.c b/qemu-nbd.c
index a7075c5419..1d337b7504 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -509,6 +509,7 @@ static const char *socket_activation_validate_opts(const char *device,
static void qemu_nbd_shutdown(void)
{
job_cancel_sync_all();
+ blk_exp_close_all();
bdrv_close_all();
}
diff --git a/softmmu/vl.c b/softmmu/vl.c
index 065d52e8dc..3244ee5e12 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -66,6 +66,7 @@
#include "qemu/log.h"
#include "sysemu/blockdev.h"
#include "hw/block/block.h"
+#include "block/export.h"
#include "migration/misc.h"
#include "migration/snapshot.h"
#include "migration/global_state.h"
@@ -4526,6 +4527,14 @@ void qemu_cleanup(void)
*/
migration_shutdown();
+ /*
+ * Close the exports before draining the block layer. The export
+ * drivers may have coroutines yielding on it, so we need to clean
+ * them up before the drain, as otherwise they may be get stuck in
+ * blk_wait_while_drained().
+ */
+ blk_exp_close_all();
+
/*
* We must cancel all block jobs while the block layer is drained,
* or cancelling will be affected by throttling and thus may block
diff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-storage-daemon.c
index e0c87edbdd..d8d172cc60 100644
--- a/storage-daemon/qemu-storage-daemon.c
+++ b/storage-daemon/qemu-storage-daemon.c
@@ -314,6 +314,7 @@ int main(int argc, char *argv[])
main_loop_wait(false);
}
+ blk_exp_close_all();
bdrv_drain_all_begin();
bdrv_close_all();
--
2.27.0

249
kvm-nbd-server-Quiesce-coroutines-on-context-switch.patch Normal file
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@ -0,0 +1,249 @@
From 7cadf68c46abcd097fcbcecb11a4a04f264d0316 Mon Sep 17 00:00:00 2001
From: Sergio Lopez Pascual <slp@redhat.com>
Date: Thu, 11 Feb 2021 14:42:05 -0300
Subject: [PATCH 3/6] nbd/server: Quiesce coroutines on context switch
RH-Author: Sergio Lopez Pascual <slp@redhat.com>
Message-id: <20210211144208.58930-3-slp@redhat.com>
Patchwork-id: 101051
O-Subject: [RHEL-AV-8.4.0 qemu-kvm PATCH 2/5] nbd/server: Quiesce coroutines on context switch
Bugzilla: 1918966 1918968
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Eric Blake <eblake@redhat.com>
When switching between AIO contexts we need to me make sure that both
recv_coroutine and send_coroutine are not scheduled to run. Otherwise,
QEMU may crash while attaching the new context with an error like
this one:
aio_co_schedule: Co-routine was already scheduled in 'aio_co_schedule'
To achieve this we need a local implementation of
'qio_channel_readv_all_eof' named 'nbd_read_eof' (a trick already done
by 'nbd/client.c') that allows us to interrupt the operation and to
know when recv_coroutine is yielding.
With this in place, we delegate detaching the AIO context to the
owning context with a BH ('nbd_aio_detach_bh') scheduled using
'aio_wait_bh_oneshot'. This BH signals that we need to quiesce the
channel by setting 'client->quiescing' to 'true', and either waits for
the coroutine to finish using AIO_WAIT_WHILE or, if it's yielding in
'nbd_read_eof', actively enters the coroutine to interrupt it.
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1900326
Signed-off-by: Sergio Lopez <slp@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20201214170519.223781-4-slp@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
(cherry picked from commit f148ae7d36cbb924447f4b528a94d7799836c749)
Signed-off-by: Sergio Lopez <slp@redhat.com>
Signed-off-by: Eduardo Lima (Etrunko) <etrunko@redhat.com>
---
nbd/server.c | 120 +++++++++++++++++++++++++++++++++++++++++++++------
1 file changed, 106 insertions(+), 14 deletions(-)
diff --git a/nbd/server.c b/nbd/server.c
index 613ed2634a..7229f487d2 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -132,6 +132,9 @@ struct NBDClient {
CoMutex send_lock;
Coroutine *send_coroutine;
+ bool read_yielding;
+ bool quiescing;
+
QTAILQ_ENTRY(NBDClient) next;
int nb_requests;
bool closing;
@@ -1352,14 +1355,60 @@ static coroutine_fn int nbd_negotiate(NBDClient *client, Error **errp)
return 0;
}
-static int nbd_receive_request(QIOChannel *ioc, NBDRequest *request,
+/* nbd_read_eof
+ * Tries to read @size bytes from @ioc. This is a local implementation of
+ * qio_channel_readv_all_eof. We have it here because we need it to be
+ * interruptible and to know when the coroutine is yielding.
+ * Returns 1 on success
+ * 0 on eof, when no data was read (errp is not set)
+ * negative errno on failure (errp is set)
+ */
+static inline int coroutine_fn
+nbd_read_eof(NBDClient *client, void *buffer, size_t size, Error **errp)
+{
+ bool partial = false;
+
+ assert(size);
+ while (size > 0) {
+ struct iovec iov = { .iov_base = buffer, .iov_len = size };
+ ssize_t len;
+
+ len = qio_channel_readv(client->ioc, &iov, 1, errp);
+ if (len == QIO_CHANNEL_ERR_BLOCK) {
+ client->read_yielding = true;
+ qio_channel_yield(client->ioc, G_IO_IN);
+ client->read_yielding = false;
+ if (client->quiescing) {
+ return -EAGAIN;
+ }
+ continue;
+ } else if (len < 0) {
+ return -EIO;
+ } else if (len == 0) {
+ if (partial) {
+ error_setg(errp,
+ "Unexpected end-of-file before all bytes were read");
+ return -EIO;
+ } else {
+ return 0;
+ }
+ }
+
+ partial = true;
+ size -= len;
+ buffer = (uint8_t *) buffer + len;
+ }
+ return 1;
+}
+
+static int nbd_receive_request(NBDClient *client, NBDRequest *request,
Error **errp)
{
uint8_t buf[NBD_REQUEST_SIZE];
uint32_t magic;
int ret;
- ret = nbd_read(ioc, buf, sizeof(buf), "request", errp);
+ ret = nbd_read_eof(client, buf, sizeof(buf), errp);
if (ret < 0) {
return ret;
}
@@ -1480,11 +1529,37 @@ static void blk_aio_attached(AioContext *ctx, void *opaque)
QTAILQ_FOREACH(client, &exp->clients, next) {
qio_channel_attach_aio_context(client->ioc, ctx);
+
+ assert(client->recv_coroutine == NULL);
+ assert(client->send_coroutine == NULL);
+
+ if (client->quiescing) {
+ client->quiescing = false;
+ nbd_client_receive_next_request(client);
+ }
+ }
+}
+
+static void nbd_aio_detach_bh(void *opaque)
+{
+ NBDExport *exp = opaque;
+ NBDClient *client;
+
+ QTAILQ_FOREACH(client, &exp->clients, next) {
+ qio_channel_detach_aio_context(client->ioc);
+ client->quiescing = true;
+
if (client->recv_coroutine) {
- aio_co_schedule(ctx, client->recv_coroutine);
+ if (client->read_yielding) {
+ qemu_aio_coroutine_enter(exp->common.ctx,
+ client->recv_coroutine);
+ } else {
+ AIO_WAIT_WHILE(exp->common.ctx, client->recv_coroutine != NULL);
+ }
}
+
if (client->send_coroutine) {
- aio_co_schedule(ctx, client->send_coroutine);
+ AIO_WAIT_WHILE(exp->common.ctx, client->send_coroutine != NULL);
}
}
}
@@ -1492,13 +1567,10 @@ static void blk_aio_attached(AioContext *ctx, void *opaque)
static void blk_aio_detach(void *opaque)
{
NBDExport *exp = opaque;
- NBDClient *client;
trace_nbd_blk_aio_detach(exp->name, exp->common.ctx);
- QTAILQ_FOREACH(client, &exp->clients, next) {
- qio_channel_detach_aio_context(client->ioc);
- }
+ aio_wait_bh_oneshot(exp->common.ctx, nbd_aio_detach_bh, exp);
exp->common.ctx = NULL;
}
@@ -2151,20 +2223,23 @@ static int nbd_co_send_bitmap(NBDClient *client, uint64_t handle,
/* nbd_co_receive_request
* Collect a client request. Return 0 if request looks valid, -EIO to drop
- * connection right away, and any other negative value to report an error to
- * the client (although the caller may still need to disconnect after reporting
- * the error).
+ * connection right away, -EAGAIN to indicate we were interrupted and the
+ * channel should be quiesced, and any other negative value to report an error
+ * to the client (although the caller may still need to disconnect after
+ * reporting the error).
*/
static int nbd_co_receive_request(NBDRequestData *req, NBDRequest *request,
Error **errp)
{
NBDClient *client = req->client;
int valid_flags;
+ int ret;
g_assert(qemu_in_coroutine());
assert(client->recv_coroutine == qemu_coroutine_self());
- if (nbd_receive_request(client->ioc, request, errp) < 0) {
- return -EIO;
+ ret = nbd_receive_request(client, request, errp);
+ if (ret < 0) {
+ return ret;
}
trace_nbd_co_receive_request_decode_type(request->handle, request->type,
@@ -2507,6 +2582,17 @@ static coroutine_fn void nbd_trip(void *opaque)
return;
}
+ if (client->quiescing) {
+ /*
+ * We're switching between AIO contexts. Don't attempt to receive a new
+ * request and kick the main context which may be waiting for us.
+ */
+ nbd_client_put(client);
+ client->recv_coroutine = NULL;
+ aio_wait_kick();
+ return;
+ }
+
req = nbd_request_get(client);
ret = nbd_co_receive_request(req, &request, &local_err);
client->recv_coroutine = NULL;
@@ -2519,6 +2605,11 @@ static coroutine_fn void nbd_trip(void *opaque)
goto done;
}
+ if (ret == -EAGAIN) {
+ assert(client->quiescing);
+ goto done;
+ }
+
nbd_client_receive_next_request(client);
if (ret == -EIO) {
goto disconnect;
@@ -2565,7 +2656,8 @@ disconnect:
static void nbd_client_receive_next_request(NBDClient *client)
{
- if (!client->recv_coroutine && client->nb_requests < MAX_NBD_REQUESTS) {
+ if (!client->recv_coroutine && client->nb_requests < MAX_NBD_REQUESTS &&
+ !client->quiescing) {
nbd_client_get(client);
client->recv_coroutine = qemu_coroutine_create(nbd_trip, client);
aio_co_schedule(client->exp->common.ctx, client->recv_coroutine);
--
2.27.0

48
kvm-storage-daemon-Call-bdrv_close_all-on-exit.patch Normal file
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@ -0,0 +1,48 @@
From b1883ddf10c2ec31ac72866494687d8897535a82 Mon Sep 17 00:00:00 2001
From: Sergio Lopez Pascual <slp@redhat.com>
Date: Thu, 11 Feb 2021 14:42:07 -0300
Subject: [PATCH 5/6] storage-daemon: Call bdrv_close_all() on exit
RH-Author: Sergio Lopez Pascual <slp@redhat.com>
Message-id: <20210211144208.58930-5-slp@redhat.com>
Patchwork-id: 101048
O-Subject: [RHEL-AV-8.4.0 qemu-kvm PATCH 4/5] storage-daemon: Call bdrv_close_all() on exit
Bugzilla: 1918966 1918968
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Eric Blake <eblake@redhat.com>
From: Max Reitz <mreitz@redhat.com>
Otherwise, exports and block devices are not properly shut down and
closed, unless the users explicitly issues blockdev-del and
block-export-del commands for each of them.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20201027190600.192171-17-mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit b55a3c8860b763b62b2cc2f4a6f55379977bbde5)
Signed-off-by: Sergio Lopez <slp@redhat.com>
Signed-off-by: Eduardo Lima (Etrunko) <etrunko@redhat.com>
---
storage-daemon/qemu-storage-daemon.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-storage-daemon.c
index 7c914b0dc1..e0c87edbdd 100644
--- a/storage-daemon/qemu-storage-daemon.c
+++ b/storage-daemon/qemu-storage-daemon.c
@@ -314,6 +314,9 @@ int main(int argc, char *argv[])
main_loop_wait(false);
}
+ bdrv_drain_all_begin();
+ bdrv_close_all();
+
monitor_cleanup();
qemu_chr_cleanup();
user_creatable_cleanup();
--
2.27.0

234
kvm-virtio-Add-corresponding-memory_listener_unregister-.patch Normal file
View File

@ -0,0 +1,234 @@
From ac9e40a75eba0019fb9930835804e8daceead981 Mon Sep 17 00:00:00 2001
From: eperezma <eperezma@redhat.com>
Date: Tue, 9 Feb 2021 10:38:16 -0300
Subject: [PATCH 1/6] virtio: Add corresponding memory_listener_unregister to
unrealize
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: eperezma <eperezma@redhat.com>
Message-id: <20210209103816.1636200-2-eperezma@redhat.com>
Patchwork-id: 101009
O-Subject: [RHEL-AV-8.4.0 qemu-kvm PATCH 1/1] virtio: Add corresponding memory_listener_unregister to unrealize
Bugzilla: 1903521
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Address space is destroyed without proper removal of its listeners with
current code. They are expected to be removed in
virtio_device_instance_finalize [1], but qemu calls it through
object_deinit, after address_space_destroy call through
device_set_realized [2].
Move it to virtio_device_unrealize, called before device_set_realized
[3] and making it symmetric with memory_listener_register in
virtio_device_realize.
v2: Delete no-op call of virtio_device_instance_finalize.
Add backtraces.
[1]
#0 virtio_device_instance_finalize (obj=0x555557de5120)
at /home/qemu/include/hw/virtio/virtio.h:71
#1 0x0000555555b703c9 in object_deinit (type=0x555556639860,
obj=<optimized out>) at ../qom/object.c:671
#2 object_finalize (data=0x555557de5120) at ../qom/object.c:685
#3 object_unref (objptr=0x555557de5120) at ../qom/object.c:1184
#4 0x0000555555b4de9d in bus_free_bus_child (kid=0x555557df0660)
at ../hw/core/qdev.c:55
#5 0x0000555555c65003 in call_rcu_thread (opaque=opaque@entry=0x0)
at ../util/rcu.c:281
Queued by:
#0 bus_remove_child (bus=0x555557de5098,
child=child@entry=0x555557de5120) at ../hw/core/qdev.c:60
#1 0x0000555555b4ee31 in device_unparent (obj=<optimized out>)
at ../hw/core/qdev.c:984
#2 0x0000555555b70465 in object_finalize_child_property (
obj=<optimized out>, name=<optimized out>, opaque=0x555557de5120)
at ../qom/object.c:1725
#3 0x0000555555b6fa17 in object_property_del_child (
child=0x555557de5120, obj=0x555557ddcf90) at ../qom/object.c:645
#4 object_unparent (obj=0x555557de5120) at ../qom/object.c:664
#5 0x0000555555b4c071 in bus_unparent (obj=<optimized out>)
at ../hw/core/bus.c:147
#6 0x0000555555b70465 in object_finalize_child_property (
obj=<optimized out>, name=<optimized out>, opaque=0x555557de5098)
at ../qom/object.c:1725
#7 0x0000555555b6fa17 in object_property_del_child (
child=0x555557de5098, obj=0x555557ddcf90) at ../qom/object.c:645
#8 object_unparent (obj=0x555557de5098) at ../qom/object.c:664
#9 0x0000555555b4ee19 in device_unparent (obj=<optimized out>)
at ../hw/core/qdev.c:981
#10 0x0000555555b70465 in object_finalize_child_property (
obj=<optimized out>, name=<optimized out>, opaque=0x555557ddcf90)
at ../qom/object.c:1725
#11 0x0000555555b6fa17 in object_property_del_child (
child=0x555557ddcf90, obj=0x55555685da10) at ../qom/object.c:645
#12 object_unparent (obj=0x555557ddcf90) at ../qom/object.c:664
#13 0x00005555558dc331 in pci_for_each_device_under_bus (
opaque=<optimized out>, fn=<optimized out>, bus=<optimized out>)
at ../hw/pci/pci.c:1654
[2]
Optimizer omits pci_qdev_unrealize, called by device_set_realized, and
do_pci_unregister_device, called by pci_qdev_unrealize and caller of
address_space_destroy.
#0 address_space_destroy (as=0x555557ddd1b8)
at ../softmmu/memory.c:2840
#1 0x0000555555b4fc53 in device_set_realized (obj=0x555557ddcf90,
value=<optimized out>, errp=0x7fffeea8f1e0)
at ../hw/core/qdev.c:850
#2 0x0000555555b6eaa6 in property_set_bool (obj=0x555557ddcf90,
v=<optimized out>, name=<optimized out>, opaque=0x555556650ba0,
errp=0x7fffeea8f1e0) at ../qom/object.c:2255
#3 0x0000555555b70e07 in object_property_set (
obj=obj@entry=0x555557ddcf90,
name=name@entry=0x555555db99df "realized",
v=v@entry=0x7fffe46b7500,
errp=errp@entry=0x5555565bbf38 <error_abort>)
at ../qom/object.c:1400
#4 0x0000555555b73c5f in object_property_set_qobject (
obj=obj@entry=0x555557ddcf90,
name=name@entry=0x555555db99df "realized",
value=value@entry=0x7fffe44f6180,
errp=errp@entry=0x5555565bbf38 <error_abort>)
at ../qom/qom-qobject.c:28
#5 0x0000555555b71044 in object_property_set_bool (
obj=0x555557ddcf90, name=0x555555db99df "realized",
value=<optimized out>, errp=0x5555565bbf38 <error_abort>)
at ../qom/object.c:1470
#6 0x0000555555921cb7 in pcie_unplug_device (bus=<optimized out>,
dev=0x555557ddcf90,
opaque=<optimized out>) at /home/qemu/include/hw/qdev-core.h:17
#7 0x00005555558dc331 in pci_for_each_device_under_bus (
opaque=<optimized out>, fn=<optimized out>,
bus=<optimized out>) at ../hw/pci/pci.c:1654
[3]
#0 virtio_device_unrealize (dev=0x555557de5120)
at ../hw/virtio/virtio.c:3680
#1 0x0000555555b4fc63 in device_set_realized (obj=0x555557de5120,
value=<optimized out>, errp=0x7fffee28df90)
at ../hw/core/qdev.c:850
#2 0x0000555555b6eab6 in property_set_bool (obj=0x555557de5120,
v=<optimized out>, name=<optimized out>, opaque=0x555556650ba0,
errp=0x7fffee28df90) at ../qom/object.c:2255
#3 0x0000555555b70e17 in object_property_set (
obj=obj@entry=0x555557de5120,
name=name@entry=0x555555db99ff "realized",
v=v@entry=0x7ffdd8035040,
errp=errp@entry=0x5555565bbf38 <error_abort>)
at ../qom/object.c:1400
#4 0x0000555555b73c6f in object_property_set_qobject (
obj=obj@entry=0x555557de5120,
name=name@entry=0x555555db99ff "realized",
value=value@entry=0x7ffdd8035020,
errp=errp@entry=0x5555565bbf38 <error_abort>)
at ../qom/qom-qobject.c:28
#5 0x0000555555b71054 in object_property_set_bool (
obj=0x555557de5120, name=name@entry=0x555555db99ff "realized",
value=value@entry=false, errp=0x5555565bbf38 <error_abort>)
at ../qom/object.c:1470
#6 0x0000555555b4edc5 in qdev_unrealize (dev=<optimized out>)
at ../hw/core/qdev.c:403
#7 0x0000555555b4c2a9 in bus_set_realized (obj=<optimized out>,
value=<optimized out>, errp=<optimized out>)
at ../hw/core/bus.c:204
#8 0x0000555555b6eab6 in property_set_bool (obj=0x555557de5098,
v=<optimized out>, name=<optimized out>, opaque=0x555557df04c0,
errp=0x7fffee28e0a0) at ../qom/object.c:2255
#9 0x0000555555b70e17 in object_property_set (
obj=obj@entry=0x555557de5098,
name=name@entry=0x555555db99ff "realized",
v=v@entry=0x7ffdd8034f50,
errp=errp@entry=0x5555565bbf38 <error_abort>)
at ../qom/object.c:1400
#10 0x0000555555b73c6f in object_property_set_qobject (
obj=obj@entry=0x555557de5098,
name=name@entry=0x555555db99ff "realized",
value=value@entry=0x7ffdd8020630,
errp=errp@entry=0x5555565bbf38 <error_abort>)
at ../qom/qom-qobject.c:28
#11 0x0000555555b71054 in object_property_set_bool (
obj=obj@entry=0x555557de5098,
name=name@entry=0x555555db99ff "realized",
value=value@entry=false, errp=0x5555565bbf38 <error_abort>)
at ../qom/object.c:1470
#12 0x0000555555b4c725 in qbus_unrealize (
bus=bus@entry=0x555557de5098) at ../hw/core/bus.c:178
#13 0x0000555555b4fc00 in device_set_realized (obj=0x555557ddcf90,
value=<optimized out>, errp=0x7fffee28e1e0)
at ../hw/core/qdev.c:844
#14 0x0000555555b6eab6 in property_set_bool (obj=0x555557ddcf90,
v=<optimized out>, name=<optimized out>, opaque=0x555556650ba0,
errp=0x7fffee28e1e0) at ../qom/object.c:2255
#15 0x0000555555b70e17 in object_property_set (
obj=obj@entry=0x555557ddcf90,
name=name@entry=0x555555db99ff "realized",
v=v@entry=0x7ffdd8020560,
errp=errp@entry=0x5555565bbf38 <error_abort>)
at ../qom/object.c:1400
#16 0x0000555555b73c6f in object_property_set_qobject (
obj=obj@entry=0x555557ddcf90,
name=name@entry=0x555555db99ff "realized",
value=value@entry=0x7ffdd8020540,
errp=errp@entry=0x5555565bbf38 <error_abort>)
at ../qom/qom-qobject.c:28
#17 0x0000555555b71054 in object_property_set_bool (
obj=0x555557ddcf90, name=0x555555db99ff "realized",
value=<optimized out>, errp=0x5555565bbf38 <error_abort>)
at ../qom/object.c:1470
#18 0x0000555555921cb7 in pcie_unplug_device (bus=<optimized out>,
dev=0x555557ddcf90, opaque=<optimized out>)
at /home/qemu/include/hw/qdev-core.h:17
#19 0x00005555558dc331 in pci_for_each_device_under_bus (
opaque=<optimized out>, fn=<optimized out>, bus=<optimized out>)
at ../hw/pci/pci.c:1654
Fixes: c611c76417f ("virtio: add MemoryListener to cache ring translations")
Buglink: https://bugs.launchpad.net/qemu/+bug/1912846
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20210125192505.390554-1-eperezma@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit f6ab64c05f8a6229bf6569d3791c23abb9f6eee4)
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Eduardo Lima (Etrunko) <etrunko@redhat.com>
---
hw/virtio/virtio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index ceb58fda6c..9312e7191b 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -3677,6 +3677,7 @@ static void virtio_device_unrealize(DeviceState *dev)
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(dev);
+ memory_listener_unregister(&vdev->listener);
virtio_bus_device_unplugged(vdev);
if (vdc->unrealize != NULL) {
@@ -3707,7 +3708,6 @@ static void virtio_device_instance_finalize(Object *obj)
{
VirtIODevice *vdev = VIRTIO_DEVICE(obj);
- memory_listener_unregister(&vdev->listener);
virtio_device_free_virtqueues(vdev);
g_free(vdev->config);
--
2.27.0

34
qemu-kvm.spec
View File

@ -64,7 +64,7 @@ Requires: %{name}-block-ssh = %{epoch}:%{version}-%{release}
Summary: QEMU is a machine emulator and virtualizer
Name: qemu-kvm
Version: 5.2.0
Release: 6%{?dist}
Release: 7%{?dist}
# Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
Epoch: 15
License: GPLv2 and GPLv2+ and CC-BY
@ -165,6 +165,23 @@ Patch63: kvm-hw-arm-smmuv3-Fix-addr_mask-for-range-based-invalida.patch
Patch65: kvm-vhost-Unbreak-SMMU-and-virtio-iommu-on-dev-iotlb-sup.patch
# For bz#1902537 - The default fsfreeze-hook path from man page and qemu-ga --help command are different
Patch66: kvm-docs-set-CONFDIR-when-running-sphinx.patch
# For bz#1903521 - hot unplug vhost-user cause qemu crash: qemu-kvm: ../softmmu/memory.c:2818: do_address_space_destroy: Assertion `QTAILQ_EMPTY(&as->listeners)' failed.
Patch67: kvm-virtio-Add-corresponding-memory_listener_unregister-.patch
# For bz#1918966 - [incremental_backup] qemu aborts if guest reboot during backup when using virtio-blk: "aio_co_schedule: Co-routine was already scheduled in 'aio_co_schedule'"
# For bz#1918968 - [incremental_backup] qemu deadlock after poweroff in guest during backup in nbd_export_close_all()
Patch68: kvm-block-Honor-blk_set_aio_context-context-requirements.patch
# For bz#1918966 - [incremental_backup] qemu aborts if guest reboot during backup when using virtio-blk: "aio_co_schedule: Co-routine was already scheduled in 'aio_co_schedule'"
# For bz#1918968 - [incremental_backup] qemu deadlock after poweroff in guest during backup in nbd_export_close_all()
Patch69: kvm-nbd-server-Quiesce-coroutines-on-context-switch.patch
# For bz#1918966 - [incremental_backup] qemu aborts if guest reboot during backup when using virtio-blk: "aio_co_schedule: Co-routine was already scheduled in 'aio_co_schedule'"
# For bz#1918968 - [incremental_backup] qemu deadlock after poweroff in guest during backup in nbd_export_close_all()
Patch70: kvm-block-Avoid-processing-BDS-twice-in-bdrv_set_aio_con.patch
# For bz#1918966 - [incremental_backup] qemu aborts if guest reboot during backup when using virtio-blk: "aio_co_schedule: Co-routine was already scheduled in 'aio_co_schedule'"
# For bz#1918968 - [incremental_backup] qemu deadlock after poweroff in guest during backup in nbd_export_close_all()
Patch71: kvm-storage-daemon-Call-bdrv_close_all-on-exit.patch
# For bz#1918966 - [incremental_backup] qemu aborts if guest reboot during backup when using virtio-blk: "aio_co_schedule: Co-routine was already scheduled in 'aio_co_schedule'"
# For bz#1918968 - [incremental_backup] qemu deadlock after poweroff in guest during backup in nbd_export_close_all()
Patch72: kvm-block-move-blk_exp_close_all-to-qemu_cleanup.patch
BuildRequires: wget
BuildRequires: rpm-build
@ -1354,6 +1371,21 @@ sh %{_sysconfdir}/sysconfig/modules/kvm.modules &> /dev/null || :
%changelog
* Fri Feb 12 2021 Eduardo Lima (Etrunko) <elima@redhat.com> - 5.2.0-7.el8
- kvm-virtio-Add-corresponding-memory_listener_unregister-.patch [bz#1903521]
- kvm-block-Honor-blk_set_aio_context-context-requirements.patch [bz#1918966 bz#1918968]
- kvm-nbd-server-Quiesce-coroutines-on-context-switch.patch [bz#1918966 bz#1918968]
- kvm-block-Avoid-processing-BDS-twice-in-bdrv_set_aio_con.patch [bz#1918966 bz#1918968]
- kvm-storage-daemon-Call-bdrv_close_all-on-exit.patch [bz#1918966 bz#1918968]
- kvm-block-move-blk_exp_close_all-to-qemu_cleanup.patch [bz#1918966 bz#1918968]
- Resolves: bz#1903521
(hot unplug vhost-user cause qemu crash: qemu-kvm: ../softmmu/memory.c:2818: do_address_space_destroy: Assertion `QTAILQ_EMPTY(&as->listeners)' failed.)
- Resolves: bz#1918966
([incremental_backup] qemu aborts if guest reboot during backup when using virtio-blk: "aio_co_schedule: Co-routine was already scheduled in 'aio_co_schedule'")
- Resolves: bz#1918968
([incremental_backup] qemu deadlock after poweroff in guest during backup in nbd_export_close_all())
* Fri Feb 12 2021 Miroslav Rezanina <mrezanin@redhat.com> - 5.2.0-6.el8
- kvm-scsi-fix-device-removal-race-vs-IO-restart-callback-.patch [bz#1854811]
- kvm-tracetool-also-strip-l-and-ll-from-systemtap-format-.patch [bz#1907264]