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qemu-file: simplify and export qemu_ftell 

Force a flush when qemu_ftell is called.  This simplifies the buffer magic
(it also breaks qemu_ftell for input QEMUFiles, but we never use it).

Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-02-22 17:36:40 +01:00 committed by Juan Quintela
parent 0cc3f3ccc9
commit 3f2d38faab
1 changed files with 8 additions and 12 deletions
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20
savevm.c
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@ -119,8 +119,8 @@ struct QEMUFile {
void *opaque;
int is_write;
int64_t buf_offset; /* start of buffer when writing, end of buffer
when reading */
int64_t pos; /* start of buffer when writing, end of buffer
when reading */
int buf_index;
int buf_size; /* 0 when writing */
uint8_t buf[IO_BUF_SIZE];
@ -505,9 +505,9 @@ static void qemu_fflush(QEMUFile *f)
return;
}
if (f->is_write && f->buf_index > 0) {
ret = f->ops->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
ret = f->ops->put_buffer(f->opaque, f->buf, f->pos, f->buf_index);
if (ret >= 0) {
f->buf_offset += f->buf_index;
f->pos += f->buf_index;
}
f->buf_index = 0;
}
@ -534,11 +534,11 @@ static void qemu_fill_buffer(QEMUFile *f)
f->buf_index = 0;
f->buf_size = pending;
len = f->ops->get_buffer(f->opaque, f->buf + pending, f->buf_offset,
len = f->ops->get_buffer(f->opaque, f->buf + pending, f->pos,
IO_BUF_SIZE - pending);
if (len > 0) {
f->buf_size += len;
f->buf_offset += len;
f->pos += len;
} else if (len == 0) {
qemu_file_set_error(f, -EIO);
} else if (len != -EAGAIN)
@ -718,12 +718,8 @@ int qemu_get_byte(QEMUFile *f)
int64_t qemu_ftell(QEMUFile *f)
{
/* buf_offset excludes buffer for writing but includes it for reading */
if (f->is_write) {
return f->buf_offset + f->buf_index;
} else {
return f->buf_offset - f->buf_size + f->buf_index;
}
qemu_fflush(f);
return f->pos;
}
int qemu_file_rate_limit(QEMUFile *f)