haraldwolff/qemu-patch-raspberry4
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migration: unify stdio-based QEMUFile operations

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Now that qemu_fseek does not exist anymore, there is no reason to do
an fseek before fread/fwrite when operating on an stdio file.
Thus, unify the get/put_buffer callbacks used by qemu_fopen
with those used for pipes.

Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2012-09-21 12:04:03 +02:00
parent 4ba79505f4
commit 5f0ebf1b4d
1 changed files with 2 additions and 17 deletions
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19
savevm.c
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@ -343,21 +343,6 @@ QEMUFile *qemu_fopen_socket(int fd)
return s->file;
}
static int file_put_buffer(void *opaque, const uint8_t *buf,
int64_t pos, int size)
{
QEMUFileStdio *s = opaque;
fseek(s->stdio_file, pos, SEEK_SET);
return fwrite(buf, 1, size, s->stdio_file);
}
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
{
QEMUFileStdio *s = opaque;
fseek(s->stdio_file, pos, SEEK_SET);
return fread(buf, 1, size, s->stdio_file);
}
QEMUFile *qemu_fopen(const char *filename, const char *mode)
{
QEMUFileStdio *s;
@ -376,10 +361,10 @@ QEMUFile *qemu_fopen(const char *filename, const char *mode)
goto fail;
if(mode[0] == 'w') {
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose,
NULL, NULL, NULL);
} else {
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose,
NULL, NULL, NULL);
}
return s->file;