static int writev_f(int argc, char **argv) { struct timeval t1, t2; int Cflag = 0, qflag = 0; int c, cnt; char *buf; int64_t offset; /* Some compilers get confused and warn if this is not initialized. */ int total = 0; int nr_iov; int pattern = 0xcd; QEMUIOVector qiov; while ((c = getopt(argc, argv, "CqP:")) != EOF) { switch (c) { case 'C': Cflag = 1; break; case 'q': qflag = 1; break; case 'P': pattern = parse_pattern(optarg); if (pattern < 0) { return 0; } break; default: return command_usage(&writev_cmd); } } if (optind > argc - 2) { return command_usage(&writev_cmd); } offset = cvtnum(argv[optind]); if (offset < 0) { printf("non-numeric length argument -- %s\n", argv[optind]); return 0; } optind++; if (offset & 0x1ff) { printf("offset %" PRId64 " is not sector aligned\n", offset); return 0; } nr_iov = argc - optind; buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern); if (buf == NULL) { return 0; } gettimeofday(&t1, NULL); cnt = do_aio_writev(&qiov, offset, &total); gettimeofday(&t2, NULL); if (cnt < 0) { printf("writev failed: %s\n", strerror(-cnt)); goto out; } if (qflag) { goto out; } /* Finally, report back -- -C gives a parsable format */ t2 = tsub(t2, t1); print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag); out: qemu_io_free(buf); return 0; }