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[PULL 17/33] migration: introduce new constructors for QEMUFile
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[PULL 17/33] migration: introduce new constructors for QEMUFile |
Date: |
Thu, 23 Jun 2022 10:27:54 +0100 |
From: Daniel P. Berrangé <berrange@redhat.com>
Prepare for the elimination of QEMUFileOps by introducing a pair of new
constructors. This lets us distinguish between an input and output file
object explicitly rather than via the existance of specific callbacks.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
migration/qemu-file-channel.c | 4 ++--
migration/qemu-file.c | 18 ++++++++++++++++--
migration/qemu-file.h | 3 ++-
3 files changed, 20 insertions(+), 5 deletions(-)
diff --git a/migration/qemu-file-channel.c b/migration/qemu-file-channel.c
index ce8eced417..5cb8ac93c0 100644
--- a/migration/qemu-file-channel.c
+++ b/migration/qemu-file-channel.c
@@ -184,11 +184,11 @@ static const QEMUFileOps channel_output_ops = {
QEMUFile *qemu_fopen_channel_input(QIOChannel *ioc)
{
object_ref(OBJECT(ioc));
- return qemu_fopen_ops(ioc, &channel_input_ops);
+ return qemu_file_new_input(ioc, &channel_input_ops);
}
QEMUFile *qemu_fopen_channel_output(QIOChannel *ioc)
{
object_ref(OBJECT(ioc));
- return qemu_fopen_ops(ioc, &channel_output_ops);
+ return qemu_file_new_output(ioc, &channel_output_ops);
}
diff --git a/migration/qemu-file.c b/migration/qemu-file.c
index 30e2160041..2d6ceb53af 100644
--- a/migration/qemu-file.c
+++ b/migration/qemu-file.c
@@ -38,6 +38,7 @@ struct QEMUFile {
const QEMUFileOps *ops;
const QEMUFileHooks *hooks;
QIOChannel *ioc;
+ bool is_writable;
/*
* Maximum amount of data in bytes to transfer during one
@@ -111,7 +112,9 @@ bool qemu_file_mode_is_not_valid(const char *mode)
return false;
}
-QEMUFile *qemu_fopen_ops(QIOChannel *ioc, const QEMUFileOps *ops)
+static QEMUFile *qemu_file_new_impl(QIOChannel *ioc,
+ const QEMUFileOps *ops,
+ bool is_writable)
{
QEMUFile *f;
@@ -119,10 +122,21 @@ QEMUFile *qemu_fopen_ops(QIOChannel *ioc, const
QEMUFileOps *ops)
f->ioc = ioc;
f->ops = ops;
+ f->is_writable = is_writable;
return f;
}
+QEMUFile *qemu_file_new_output(QIOChannel *ioc, const QEMUFileOps *ops)
+{
+ return qemu_file_new_impl(ioc, ops, true);
+}
+
+QEMUFile *qemu_file_new_input(QIOChannel *ioc, const QEMUFileOps *ops)
+{
+ return qemu_file_new_impl(ioc, ops, false);
+}
+
void qemu_file_set_hooks(QEMUFile *f, const QEMUFileHooks *hooks)
{
@@ -181,7 +195,7 @@ void qemu_file_set_error(QEMUFile *f, int ret)
bool qemu_file_is_writable(QEMUFile *f)
{
- return f->ops->writev_buffer;
+ return f->is_writable;
}
static void qemu_iovec_release_ram(QEMUFile *f)
diff --git a/migration/qemu-file.h b/migration/qemu-file.h
index 3a1ecc0e34..3c93a27978 100644
--- a/migration/qemu-file.h
+++ b/migration/qemu-file.h
@@ -118,7 +118,8 @@ typedef struct QEMUFileHooks {
QEMURamSaveFunc *save_page;
} QEMUFileHooks;
-QEMUFile *qemu_fopen_ops(QIOChannel *ioc, const QEMUFileOps *ops);
+QEMUFile *qemu_file_new_input(QIOChannel *ioc, const QEMUFileOps *ops);
+QEMUFile *qemu_file_new_output(QIOChannel *ioc, const QEMUFileOps *ops);
void qemu_file_set_hooks(QEMUFile *f, const QEMUFileHooks *hooks);
int qemu_get_fd(QEMUFile *f);
int qemu_fclose(QEMUFile *f);
--
2.36.1
- [PULL 03/33] QIOChannelSocket: Fix zero-copy send so socket flush works, (continued)
- [PULL 03/33] QIOChannelSocket: Fix zero-copy send so socket flush works, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 05/33] io: add a QIOChannelNull equivalent to /dev/null, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 06/33] migration: switch to use QIOChannelNull for dummy channel, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 08/33] migration: rename rate limiting fields in QEMUFile, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 07/33] migration: remove unreachble RDMA code in save_hook impl, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 10/33] migration: rename qemu_ftell to qemu_file_total_transferred, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 11/33] migration: rename qemu_update_position to qemu_file_credit_transfer, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 14/33] migration: convert savevm to use QIOChannelBlock for VMState, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 15/33] migration: stop passing 'opaque' parameter to QEMUFile hooks, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 19/33] migration: remove the QEMUFileOps 'shut_down' callback, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 17/33] migration: introduce new constructors for QEMUFile,
Dr. David Alan Gilbert (git) <=
- [PULL 04/33] migration: Change zero_copy_send from migration parameter to migration capability, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 09/33] migration: rename 'pos' field in QEMUFile to 'bytes_processed', Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 16/33] migration: hardcode assumption that QEMUFile is backed with QIOChannel, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 18/33] migration: remove unused QEMUFileGetFD typedef / qemu_get_fd method, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 13/33] migration: introduce a QIOChannel impl for BlockDriverState VMState, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 21/33] migration: remove the QEMUFileOps 'close' callback, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 20/33] migration: remove the QEMUFileOps 'set_blocking' callback, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 22/33] migration: remove the QEMUFileOps 'get_buffer' callback, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 25/33] migration: remove the QEMUFileOps abstraction, Dr. David Alan Gilbert (git), 2022/06/23
- [PULL 26/33] accel/kvm/kvm-all: Refactor per-vcpu dirty ring reaping, Dr. David Alan Gilbert (git), 2022/06/23