1 /* 2 * Copyright (c) 2017 Cyril Hrubis <chrubis (at) suse.cz> 3 * 4 * This program is free software: you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation, either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 /* 18 * Basic test for the BLKRASET and BLKRAGET ioctls. 19 * 20 * Sets device read-ahead, reads it back and compares the values. 21 * 22 * The read-ahead value was choosen to be multiple of 512, since it's rounded 23 * based on page size on BLKRASET and 512 should be safe enough for everyone. 24 */ 25 26 #include <errno.h> 27 #include <sys/mount.h> 28 #include "tst_test.h" 29 30 static int fd; 31 32 static void verify_ioctl(void) 33 { 34 unsigned long ra, rab, rao; 35 36 SAFE_IOCTL(fd, BLKRAGET, &rao); 37 38 tst_res(TINFO, "BLKRAGET original value %lu", rao); 39 40 for (ra = 0; ra <= 4096; ra += 512) { 41 SAFE_IOCTL(fd, BLKRASET, ra); 42 SAFE_IOCTL(fd, BLKRAGET, &rab); 43 44 if (ra == rab) 45 tst_res(TPASS, "BLKRASET %lu read back correctly", ra); 46 else 47 tst_res(TFAIL, "BLKRASET %lu read back %lu", ra, rab); 48 } 49 50 tst_res(TINFO, "BLKRASET restoring original value %lu", rao); 51 52 SAFE_IOCTL(fd, BLKRASET, rao); 53 } 54 55 static void setup(void) 56 { 57 fd = SAFE_OPEN(tst_device->dev, O_RDONLY); 58 } 59 60 static void cleanup(void) 61 { 62 if (fd > 0) 63 SAFE_CLOSE(fd); 64 } 65 66 static struct tst_test test = { 67 .needs_root = 1, 68 .needs_device = 1, 69 .setup = setup, 70 .cleanup = cleanup, 71 .test_all = verify_ioctl, 72 }; 73
