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 BLKGETSIZE and BLKGETSIZE64 ioctls. 19 * 20 * - BLKGETSIZE returns size in 512 byte blocks BLKGETSIZE64 in bytes 21 * compare that they return the same value. 22 * - lseek to the end of the device, this should work 23 * - try to read from the device, read should return 0 24 */ 25 26 #include <stdint.h> 27 #include <errno.h> 28 #include <sys/mount.h> 29 #include "tst_test.h" 30 31 static int fd; 32 33 static void verify_ioctl(void) 34 { 35 unsigned long size = 0; 36 uint64_t size64 = 0; 37 char buf; 38 int ret; 39 40 fd = SAFE_OPEN(tst_device->dev, O_RDONLY); 41 42 SAFE_IOCTL(fd, BLKGETSIZE, &size); 43 SAFE_IOCTL(fd, BLKGETSIZE64, &size64); 44 45 if (size == size64/512) { 46 tst_res(TPASS, "BLKGETSIZE returned %lu, BLKGETSIZE64 %llu", 47 size, (unsigned long long)size64); 48 } else { 49 tst_res(TFAIL, 50 "BLKGETSIZE returned %lu, BLKGETSIZE64 returned %llu", 51 size, (unsigned long long)size64); 52 } 53 54 if (lseek(fd, size * 512, SEEK_SET) != (off_t)size * 512) { 55 tst_res(TFAIL | TERRNO, 56 "Cannot lseek to the end of the device"); 57 } else { 58 tst_res(TPASS, "Could lseek to the end of the device"); 59 } 60 61 ret = read(fd, &buf, 1); 62 63 if (ret == 0) { 64 tst_res(TPASS, 65 "Got EOF when trying to read after the end of device"); 66 } else { 67 tst_res(TFAIL | TERRNO, 68 "Read at the end of device returned %i", ret); 69 } 70 71 SAFE_CLOSE(fd); 72 } 73 74 static void cleanup(void) 75 { 76 if (fd > 0) 77 SAFE_CLOSE(fd); 78 } 79 80 static struct tst_test test = { 81 .needs_device = 1, 82 .needs_root = 1, 83 .cleanup = cleanup, 84 .test_all = verify_ioctl, 85 }; 86
