Sometimes, upon interrupt, fread returns with no data, and
the (incoming exec) migration fails.
Fix by retrying on such a case.
(cherry picked from commit
8a67ec4d84f7db9add9a0b017a968d340fbfb807)
Signed-off-by: Uri Lublin <uril@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
{
QEMUFilePopen *s = opaque;
- return fread(buf, 1, size, s->popen_file);
+ FILE *fp = s->popen_file;
+ int bytes;
+
+ do {
+ clearerr(fp);
+ bytes = fread(buf, 1, size, fp);
+ } while ((bytes == 0) && ferror(fp) && (errno == EINTR));
+ return bytes;
}
static int popen_close(void *opaque)