+static int init_iolog(struct thread_data *td)
+{
+ unsigned long long offset;
+ unsigned int bytes;
+ char *str, *p;
+ FILE *f;
+ int rw, i, reads, writes;
+
+ if (!td->iolog)
+ return 0;
+
+ f = fopen(td->iolog_file, "r");
+ if (!f) {
+ perror("fopen iolog");
+ return 1;
+ }
+
+ str = malloc(4096);
+ reads = writes = i = 0;
+ while ((p = fgets(str, 4096, f)) != NULL) {
+ struct io_piece *ipo;
+
+ if (sscanf(p, "%d,%llu,%u", &rw, &offset, &bytes) != 3) {
+ fprintf(stderr, "bad iolog: %s\n", p);
+ continue;
+ }
+ if (rw == DDIR_READ)
+ reads++;
+ else if (rw == DDIR_WRITE)
+ writes++;
+ else {
+ fprintf(stderr, "bad ddir: %d\n", rw);
+ continue;
+ }
+
+ ipo = malloc(sizeof(*ipo));
+ INIT_LIST_HEAD(&ipo->list);
+ ipo->offset = offset;
+ ipo->len = bytes;
+ if (bytes > td->max_bs)
+ td->max_bs = bytes;
+ ipo->ddir = rw;
+ list_add_tail(&ipo->list, &td->io_log_list);
+ i++;
+ }
+
+ free(str);
+ fclose(f);
+
+ if (!i)
+ return 1;
+
+ if (reads && !writes)
+ td->ddir = DDIR_READ;
+ else if (!reads && writes)
+ td->ddir = DDIR_READ;
+ else
+ td->iomix = 1;
+
+ return 0;
+}
+