From: Juan Quintela <quintela@redhat.com>
To: qemu-devel@nongnu.org
Cc: Laurent Vivier <lvivier@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Thomas Huth <thuth@redhat.com>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
Juan Quintela <quintela@redhat.com>
Subject: [PATCH v4 3/6] qemu-file: Don't do IO after shutdown
Date: Wed, 22 Jan 2020 12:15:14 +0100 [thread overview]
Message-ID: <20200122111517.33223-4-quintela@redhat.com> (raw)
In-Reply-To: <20200122111517.33223-1-quintela@redhat.com>
Be sure that we are not doing neither read/write after shutdown of the
QEMUFile.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---
Set error in case that there is none (dave)
---
migration/qemu-file.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/migration/qemu-file.c b/migration/qemu-file.c
index 26fb25ddc1..bbb2b63927 100644
--- a/migration/qemu-file.c
+++ b/migration/qemu-file.c
@@ -53,6 +53,8 @@ struct QEMUFile {
int last_error;
Error *last_error_obj;
+ /* has the file has been shutdown */
+ bool shutdown;
};
/*
@@ -61,10 +63,18 @@ struct QEMUFile {
*/
int qemu_file_shutdown(QEMUFile *f)
{
+ int ret;
+
+ f->shutdown = true;
if (!f->ops->shut_down) {
return -ENOSYS;
}
- return f->ops->shut_down(f->opaque, true, true, NULL);
+ ret = f->ops->shut_down(f->opaque, true, true, NULL);
+
+ if (!f->last_error) {
+ qemu_file_set_error(f, -EIO);
+ }
+ return ret;
}
/*
@@ -214,6 +224,9 @@ void qemu_fflush(QEMUFile *f)
return;
}
+ if (f->shutdown) {
+ return;
+ }
if (f->iovcnt > 0) {
expect = iov_size(f->iov, f->iovcnt);
ret = f->ops->writev_buffer(f->opaque, f->iov, f->iovcnt, f->pos,
@@ -328,6 +341,10 @@ static ssize_t qemu_fill_buffer(QEMUFile *f)
f->buf_index = 0;
f->buf_size = pending;
+ if (f->shutdown) {
+ return 0;
+ }
+
len = f->ops->get_buffer(f->opaque, f->buf + pending, f->pos,
IO_BUF_SIZE - pending, &local_error);
if (len > 0) {
@@ -642,6 +659,9 @@ int64_t qemu_ftell(QEMUFile *f)
int qemu_file_rate_limit(QEMUFile *f)
{
+ if (f->shutdown) {
+ return 1;
+ }
if (qemu_file_get_error(f)) {
return 1;
}
--
2.24.1
next prev parent reply other threads:[~2020-01-22 11:17 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 11:15 [PATCH v4 0/6] Fix multifd + cancel + multifd Juan Quintela
2020-01-22 11:15 ` [PATCH v4 1/6] migration-test: Use g_free() instead of free() Juan Quintela
2020-01-22 12:40 ` Thomas Huth
2020-01-22 14:34 ` Philippe Mathieu-Daudé
2020-01-22 11:15 ` [PATCH v4 2/6] multifd: Make sure that we don't do any IO after an error Juan Quintela
2020-01-22 11:15 ` Juan Quintela [this message]
2020-01-22 11:15 ` [PATCH v4 4/6] migration-test: Make sure that multifd and cancel works Juan Quintela
2021-04-30 22:57 ` Peter Maydell
2021-05-04 9:41 ` Dr. David Alan Gilbert
2020-01-22 11:15 ` [PATCH v4 5/6] migration: Create migration_is_running() Juan Quintela
2020-01-23 16:37 ` Dr. David Alan Gilbert
2020-01-22 11:15 ` [PATCH v4 6/6] migration: Don't send data if we have stopped Juan Quintela
2020-01-23 16:49 ` Dr. David Alan Gilbert
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