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migration: remove the QEMUFileOps abstraction

Browse source 
Now that all QEMUFile callbacks are removed, the entire concept can be
deleted.

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>
This commit is contained in:
Daniel P. Berrangé 2022-06-20 12:02:05 +01:00 committed by Dr. David Alan Gilbert
parent 02bdbe172d
commit 77ef2dc1c8
12 changed files with 27 additions and 128 deletions
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4
migration/channel.c
View file

@ -14,7 +14,7 @@
#include "channel.h"
#include "tls.h"
#include "migration.h"
#include "qemu-file-channel.h"
#include "qemu-file.h"
#include "trace.h"
#include "qapi/error.h"
#include "io/channel-tls.h"
@ -85,7 +85,7 @@ void migration_channel_connect(MigrationState *s,
return;
}
} else {
QEMUFile *f = qemu_fopen_channel_output(ioc);
QEMUFile *f = qemu_file_new_output(ioc);
migration_ioc_register_yank(ioc);

5
migration/colo.c
View file

@ -14,7 +14,6 @@
#include "sysemu/sysemu.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-migration.h"
#include "qemu-file-channel.h"
#include "migration.h"
#include "qemu-file.h"
#include "savevm.h"
@ -559,7 +558,7 @@ static void colo_process_checkpoint(MigrationState *s)
goto out;
}
bioc = qio_channel_buffer_new(COLO_BUFFER_BASE_SIZE);
fb = qemu_fopen_channel_output(QIO_CHANNEL(bioc));
fb = qemu_file_new_output(QIO_CHANNEL(bioc));
object_unref(OBJECT(bioc));
qemu_mutex_lock_iothread();
@ -873,7 +872,7 @@ void *colo_process_incoming_thread(void *opaque)
colo_incoming_start_dirty_log();
bioc = qio_channel_buffer_new(COLO_BUFFER_BASE_SIZE);
fb = qemu_fopen_channel_input(QIO_CHANNEL(bioc));
fb = qemu_file_new_input(QIO_CHANNEL(bioc));
object_unref(OBJECT(bioc));
qemu_mutex_lock_iothread();

1
migration/meson.build
View file

@ -4,7 +4,6 @@ migration_files = files(
'xbzrle.c',
'vmstate-types.c',
'vmstate.c',
'qemu-file-channel.c',
'qemu-file.c',
'yank_functions.c',
)

7
migration/migration.c
View file

@ -30,7 +30,6 @@
#include "migration/misc.h"
#include "migration.h"
#include "savevm.h"
#include "qemu-file-channel.h"
#include "qemu-file.h"
#include "migration/vmstate.h"
#include "block/block.h"
@ -723,7 +722,7 @@ void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp)
if (!mis->from_src_file) {
/* The first connection (multifd may have multiple) */
QEMUFile *f = qemu_fopen_channel_input(ioc);
QEMUFile *f = qemu_file_new_input(ioc);
if (!migration_incoming_setup(f, errp)) {
return;
@ -3076,7 +3075,7 @@ static int postcopy_start(MigrationState *ms)
*/
bioc = qio_channel_buffer_new(4096);
qio_channel_set_name(QIO_CHANNEL(bioc), "migration-postcopy-buffer");
fb = qemu_fopen_channel_output(QIO_CHANNEL(bioc));
fb = qemu_file_new_output(QIO_CHANNEL(bioc));
object_unref(OBJECT(bioc));
/*
@ -3966,7 +3965,7 @@ static void *bg_migration_thread(void *opaque)
*/
s->bioc = qio_channel_buffer_new(512 * 1024);
qio_channel_set_name(QIO_CHANNEL(s->bioc), "vmstate-buffer");
fb = qemu_fopen_channel_output(QIO_CHANNEL(s->bioc));
fb = qemu_file_new_output(QIO_CHANNEL(s->bioc));
object_unref(OBJECT(s->bioc));
update_iteration_initial_status(s);

53
migration/qemu-file-channel.c
View file

@ -1,53 +0,0 @@
/*
* QEMUFile backend for QIOChannel objects
*
* Copyright (c) 2015-2016 Red Hat, Inc
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu-file-channel.h"
#include "qemu-file.h"
#include "io/channel-socket.h"
#include "io/channel-tls.h"
#include "qemu/iov.h"
#include "qemu/yank.h"
#include "yank_functions.h"
static const QEMUFileOps channel_input_ops = {
};
static const QEMUFileOps channel_output_ops = {
};
QEMUFile *qemu_fopen_channel_input(QIOChannel *ioc)
{
object_ref(OBJECT(ioc));
return qemu_file_new_input(ioc, &channel_input_ops);
}
QEMUFile *qemu_fopen_channel_output(QIOChannel *ioc)
{
object_ref(OBJECT(ioc));
return qemu_file_new_output(ioc, &channel_output_ops);
}

32
migration/qemu-file-channel.h
View file

@ -1,32 +0,0 @@
/*
* QEMUFile backend for QIOChannel objects
*
* Copyright (c) 2015-2016 Red Hat, Inc
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef QEMU_FILE_CHANNEL_H
#define QEMU_FILE_CHANNEL_H
#include "io/channel.h"
QEMUFile *qemu_fopen_channel_input(QIOChannel *ioc);
QEMUFile *qemu_fopen_channel_output(QIOChannel *ioc);
#endif

20
migration/qemu-file.c
View file

@ -35,7 +35,6 @@
#define MAX_IOV_SIZE MIN_CONST(IOV_MAX, 64)
struct QEMUFile {
const QEMUFileOps *ops;
const QEMUFileHooks *hooks;
QIOChannel *ioc;
bool is_writable;
@ -107,16 +106,14 @@ bool qemu_file_mode_is_not_valid(const char *mode)
return false;
}
static QEMUFile *qemu_file_new_impl(QIOChannel *ioc,
const QEMUFileOps *ops,
bool is_writable)
static QEMUFile *qemu_file_new_impl(QIOChannel *ioc, bool is_writable)
{
QEMUFile *f;
f = g_new0(QEMUFile, 1);
object_ref(ioc);
f->ioc = ioc;
f->ops = ops;
f->is_writable = is_writable;
return f;
@ -128,21 +125,19 @@ static QEMUFile *qemu_file_new_impl(QIOChannel *ioc,
*/
QEMUFile *qemu_file_get_return_path(QEMUFile *f)
{
object_ref(f->ioc);
return qemu_file_new_impl(f->ioc, f->ops, !f->is_writable);
return qemu_file_new_impl(f->ioc, !f->is_writable);
}
QEMUFile *qemu_file_new_output(QIOChannel *ioc, const QEMUFileOps *ops)
QEMUFile *qemu_file_new_output(QIOChannel *ioc)
{
return qemu_file_new_impl(ioc, ops, true);
return qemu_file_new_impl(ioc, true);
}
QEMUFile *qemu_file_new_input(QIOChannel *ioc, const QEMUFileOps *ops)
QEMUFile *qemu_file_new_input(QIOChannel *ioc)
{
return qemu_file_new_impl(ioc, ops, false);
return qemu_file_new_impl(ioc, false);
}
void qemu_file_set_hooks(QEMUFile *f, const QEMUFileHooks *hooks)
{
f->hooks = hooks;
@ -238,6 +233,7 @@ static void qemu_iovec_release_ram(QEMUFile *f)
memset(f->may_free, 0, sizeof(f->may_free));
}
/**
* Flushes QEMUFile buffer
*

7
migration/qemu-file.h
View file

@ -55,9 +55,6 @@ typedef size_t (QEMURamSaveFunc)(QEMUFile *f,
size_t size,
uint64_t *bytes_sent);
typedef struct QEMUFileOps {
} QEMUFileOps;
typedef struct QEMUFileHooks {
QEMURamHookFunc *before_ram_iterate;
QEMURamHookFunc *after_ram_iterate;
@ -65,8 +62,8 @@ typedef struct QEMUFileHooks {
QEMURamSaveFunc *save_page;
} QEMUFileHooks;
QEMUFile *qemu_file_new_input(QIOChannel *ioc, const QEMUFileOps *ops);
QEMUFile *qemu_file_new_output(QIOChannel *ioc, const QEMUFileOps *ops);
QEMUFile *qemu_file_new_input(QIOChannel *ioc);
QEMUFile *qemu_file_new_output(QIOChannel *ioc);
void qemu_file_set_hooks(QEMUFile *f, const QEMUFileHooks *hooks);
int qemu_fclose(QEMUFile *f);

3
migration/ram.c
View file

@ -38,7 +38,6 @@
#include "migration.h"
#include "migration/register.h"
#include "migration/misc.h"
#include "migration/qemu-file-channel.h"
#include "qemu-file.h"
#include "postcopy-ram.h"
#include "page_cache.h"
@ -569,7 +568,7 @@ static int compress_threads_save_setup(void)
/* comp_param[i].file is just used as a dummy buffer to save data,
* set its ops to empty.
*/
comp_param[i].file = qemu_fopen_channel_output(
comp_param[i].file = qemu_file_new_output(
QIO_CHANNEL(qio_channel_null_new()));
comp_param[i].done = true;
comp_param[i].quit = false;

5
migration/rdma.c
View file

@ -21,7 +21,6 @@
#include "migration.h"
#include "qemu-file.h"
#include "ram.h"
#include "qemu-file-channel.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
@ -4052,12 +4051,12 @@ static QEMUFile *qemu_fopen_rdma(RDMAContext *rdma, const char *mode)
rioc = QIO_CHANNEL_RDMA(object_new(TYPE_QIO_CHANNEL_RDMA));
if (mode[0] == 'w') {
rioc->file = qemu_fopen_channel_output(QIO_CHANNEL(rioc));
rioc->file = qemu_file_new_output(QIO_CHANNEL(rioc));
rioc->rdmaout = rdma;
rioc->rdmain = rdma->return_path;
qemu_file_set_hooks(rioc->file, &rdma_write_hooks);
} else {
rioc->file = qemu_fopen_channel_input(QIO_CHANNEL(rioc));
rioc->file = qemu_file_new_input(QIO_CHANNEL(rioc));
rioc->rdmain = rdma;
rioc->rdmaout = rdma->return_path;
qemu_file_set_hooks(rioc->file, &rdma_read_hooks);

13
migration/savevm.c
View file

@ -37,7 +37,6 @@
#include "migration/global_state.h"
#include "migration/channel-block.h"
#include "ram.h"
#include "qemu-file-channel.h"
#include "qemu-file.h"
#include "savevm.h"
#include "postcopy-ram.h"
@ -134,11 +133,9 @@ static struct mig_cmd_args {
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
{
if (is_writable) {
return qemu_fopen_channel_output(
QIO_CHANNEL(qio_channel_block_new(bs)));
return qemu_file_new_output(QIO_CHANNEL(qio_channel_block_new(bs)));
} else {
return qemu_fopen_channel_input(
QIO_CHANNEL(qio_channel_block_new(bs)));
return qemu_file_new_input(QIO_CHANNEL(qio_channel_block_new(bs)));
}
}
@ -2161,7 +2158,7 @@ static int loadvm_handle_cmd_packaged(MigrationIncomingState *mis)
bioc->usage += length;
trace_loadvm_handle_cmd_packaged_received(ret);
QEMUFile *packf = qemu_fopen_channel_input(QIO_CHANNEL(bioc));
QEMUFile *packf = qemu_file_new_input(QIO_CHANNEL(bioc));
ret = qemu_loadvm_state_main(packf, mis);
trace_loadvm_handle_cmd_packaged_main(ret);
@ -2919,7 +2916,7 @@ void qmp_xen_save_devices_state(const char *filename, bool has_live, bool live,
goto the_end;
}
qio_channel_set_name(QIO_CHANNEL(ioc), "migration-xen-save-state");
f = qemu_fopen_channel_output(QIO_CHANNEL(ioc));
f = qemu_file_new_output(QIO_CHANNEL(ioc));
object_unref(OBJECT(ioc));
ret = qemu_save_device_state(f);
if (ret < 0 || qemu_fclose(f) < 0) {
@ -2966,7 +2963,7 @@ void qmp_xen_load_devices_state(const char *filename, Error **errp)
return;
}
qio_channel_set_name(QIO_CHANNEL(ioc), "migration-xen-load-state");
f = qemu_fopen_channel_input(QIO_CHANNEL(ioc));
f = qemu_file_new_input(QIO_CHANNEL(ioc));
object_unref(OBJECT(ioc));
ret = qemu_loadvm_state(f);

5
tests/unit/test-vmstate.c
View file

@ -28,7 +28,6 @@
#include "migration/vmstate.h"
#include "migration/qemu-file-types.h"
#include "../migration/qemu-file.h"
#include "../migration/qemu-file-channel.h"
#include "../migration/savevm.h"
#include "qemu/coroutine.h"
#include "qemu/module.h"
@ -52,9 +51,9 @@ static QEMUFile *open_test_file(bool write)
}
ioc = QIO_CHANNEL(qio_channel_file_new_fd(fd));
if (write) {
f = qemu_fopen_channel_output(ioc);
f = qemu_file_new_output(ioc);
} else {
f = qemu_fopen_channel_input(ioc);
f = qemu_file_new_input(ioc);
}
object_unref(OBJECT(ioc));
return f;