return 0;
}
+static int sg_fd_read(int fd, void *data, size_t size)
+{
+ int err = 0;
+
+ while (size) {
+ ssize_t ret;
+
+ ret = read(fd, data, size);
+ if (ret < 0) {
+ if (errno == EAGAIN || errno == EINTR)
+ continue;
+ err = errno;
+ break;
+ } else if (!ret)
+ break;
+ else {
+ data += ret;
+ size -= ret;
+ }
+ }
+
+ if (err)
+ return err;
+ if (size)
+ return EAGAIN;
+
+ return 0;
+}
+
static int fio_sgio_getevents(struct thread_data *td, unsigned int min,
unsigned int max,
const struct timespec fio_unused *t)
events = 0;
for_each_file(td, f, i) {
for (eventNum = 0; eventNum < left; eventNum++) {
- ret = read(f->fd, p, sizeof(struct sg_io_hdr));
+ ret = sg_fd_read(f->fd, p, sizeof(struct sg_io_hdr));
dprint(FD_IO, "sgio_getevents: ret: %d\n", ret);
- if (ret < 0) {
- /*
- * not sure if EINTR is needed,
- * but seems like it should be.
- */
- if (errno == EAGAIN || errno == EINTR)
- continue;
- r = -errno;
- td_verror(td, errno, "read");
+ if (ret) {
+ r = -ret;
+ td_verror(td, r, "sg_read");
break;
- } else if (ret) {
- p += ret;
- events += 1; /* ret / sizeof(struct sg_io_hdr); */
- dprint(FD_IO, "sgio_getevents: events: %d\n", events);
}
+ p += sizeof(struct sg_io_hdr);
+ events++;
+ dprint(FD_IO, "sgio_getevents: events: %d\n", events);
}
}
- if (r < 0)
+ if (r < 0 && !events)
break;
if (!events) {
usleep(1000);