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authorDaniel P. Berrange <berrange@redhat.com>2016-04-27 11:05:17 +0100
committerAmit Shah <amit.shah@redhat.com>2016-05-26 11:32:18 +0530
commit11808bb0c422134bf09119f4aa22c59b0ce84bf3 (patch)
tree4482a308f3ff862969362981eb5c87afff551189 /migration
parente122636562218b3d442cd2cd18fbc188dd9ce709 (diff)
downloadqemu-arm-11808bb0c422134bf09119f4aa22c59b0ce84bf3.tar.gz
migration: remove support for non-iovec based write handlers
All the remaining QEMUFile implementations provide an iovec based write handler, so the put_buffer callback can be removed to simplify the code. Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1461751518-12128-28-git-send-email-berrange@redhat.com> Signed-off-by: Amit Shah <amit.shah@redhat.com>
Diffstat (limited to 'migration')
-rw-r--r--migration/qemu-file.c36
-rw-r--r--migration/savevm.c8
2 files changed, 8 insertions, 36 deletions
diff --git a/migration/qemu-file.c b/migration/qemu-file.c
index cf743d1fd5..6790040bd6 100644
--- a/migration/qemu-file.c
+++ b/migration/qemu-file.c
@@ -129,7 +129,7 @@ void qemu_file_set_error(QEMUFile *f, int ret)
bool qemu_file_is_writable(QEMUFile *f)
{
- return f->ops->writev_buffer || f->ops->put_buffer;
+ return f->ops->writev_buffer;
}
/**
@@ -148,16 +148,9 @@ void qemu_fflush(QEMUFile *f)
return;
}
- if (f->ops->writev_buffer) {
- if (f->iovcnt > 0) {
- expect = iov_size(f->iov, f->iovcnt);
- ret = f->ops->writev_buffer(f->opaque, f->iov, f->iovcnt, f->pos);
- }
- } else {
- if (f->buf_index > 0) {
- expect = f->buf_index;
- ret = f->ops->put_buffer(f->opaque, f->buf, f->pos, f->buf_index);
- }
+ if (f->iovcnt > 0) {
+ expect = iov_size(f->iov, f->iovcnt);
+ ret = f->ops->writev_buffer(f->opaque, f->iov, f->iovcnt, f->pos);
}
if (ret >= 0) {
@@ -337,11 +330,6 @@ static void add_to_iovec(QEMUFile *f, const uint8_t *buf, size_t size)
void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, size_t size)
{
- if (!f->ops->writev_buffer) {
- qemu_put_buffer(f, buf, size);
- return;
- }
-
if (f->last_error) {
return;
}
@@ -365,9 +353,7 @@ void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, size_t size)
}
memcpy(f->buf + f->buf_index, buf, l);
f->bytes_xfer += l;
- if (f->ops->writev_buffer) {
- add_to_iovec(f, f->buf + f->buf_index, l);
- }
+ add_to_iovec(f, f->buf + f->buf_index, l);
f->buf_index += l;
if (f->buf_index == IO_BUF_SIZE) {
qemu_fflush(f);
@@ -388,9 +374,7 @@ void qemu_put_byte(QEMUFile *f, int v)
f->buf[f->buf_index] = v;
f->bytes_xfer++;
- if (f->ops->writev_buffer) {
- add_to_iovec(f, f->buf + f->buf_index, 1);
- }
+ add_to_iovec(f, f->buf + f->buf_index, 1);
f->buf_index++;
if (f->buf_index == IO_BUF_SIZE) {
qemu_fflush(f);
@@ -554,12 +538,8 @@ int64_t qemu_ftell_fast(QEMUFile *f)
int64_t ret = f->pos;
int i;
- if (f->ops->writev_buffer) {
- for (i = 0; i < f->iovcnt; i++) {
- ret += f->iov[i].iov_len;
- }
- } else {
- ret += f->buf_index;
+ for (i = 0; i < f->iovcnt; i++) {
+ ret += f->iov[i].iov_len;
}
return ret;
diff --git a/migration/savevm.c b/migration/savevm.c
index 2bd345200a..6c21231131 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -160,13 +160,6 @@ static ssize_t block_writev_buffer(void *opaque, struct iovec *iov, int iovcnt,
return qiov.size;
}
-static ssize_t block_put_buffer(void *opaque, const uint8_t *buf,
- int64_t pos, size_t size)
-{
- bdrv_save_vmstate(opaque, buf, pos, size);
- return size;
-}
-
static ssize_t block_get_buffer(void *opaque, uint8_t *buf, int64_t pos,
size_t size)
{
@@ -184,7 +177,6 @@ static const QEMUFileOps bdrv_read_ops = {
};
static const QEMUFileOps bdrv_write_ops = {
- .put_buffer = block_put_buffer,
.writev_buffer = block_writev_buffer,
.close = bdrv_fclose
};