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 /* 19 * Tests that writing to fallocated file works when filesystem is full. 20 */ 21 22 #define _GNU_SOURCE 23 24 #include <stdio.h> 25 #include <stdlib.h> 26 #include <errno.h> 27 #include <fcntl.h> 28 #include "tst_test.h" 29 #include "lapi/fallocate.h" 30 31 #define MNTPOINT "mntpoint" 32 #define FALLOCATE_SIZE 8192 33 34 static int fd; 35 36 static void run(void) 37 { 38 char buf[FALLOCATE_SIZE]; 39 ssize_t ret; 40 41 fd = SAFE_OPEN(MNTPOINT "/test_file", O_WRONLY | O_CREAT); 42 43 if (fallocate(fd, 0, 0, FALLOCATE_SIZE)) { 44 if (errno == EOPNOTSUPP) { 45 tst_res(TCONF | TERRNO, "fallocate() not supported"); 46 SAFE_CLOSE(fd); 47 return; 48 } 49 50 tst_brk(TBROK | TERRNO, 51 "fallocate(fd, 0, 0, %i)", FALLOCATE_SIZE); 52 } 53 54 tst_fill_fs(MNTPOINT, 1); 55 56 ret = write(fd, buf, sizeof(buf)); 57 58 if (ret < 0) 59 tst_res(TFAIL | TERRNO, "write() failed unexpectedly"); 60 else 61 tst_res(TPASS, "write() wrote %zu bytes", ret); 62 63 ret = fallocate(fd, 0, FALLOCATE_SIZE, FALLOCATE_SIZE); 64 if (ret != -1) 65 tst_brk(TFAIL, "fallocate() succeeded unexpectedly"); 66 67 if (errno != ENOSPC) 68 tst_brk(TFAIL | TERRNO, "fallocate() should fail with ENOSPC"); 69 70 tst_res(TPASS | TERRNO, "fallocate() on full FS"); 71 72 ret = fallocate(fd, FALLOC_FL_PUNCH_HOLE, 0, FALLOCATE_SIZE); 73 if (ret == -1) { 74 if (errno == EOPNOTSUPP) 75 tst_brk(TCONF, "fallocate(FALLOC_FL_PUNCH_HOLE)"); 76 77 tst_brk(TBROK | TERRNO, "fallocate(FALLOC_FL_PUNCH_HOLE)"); 78 } 79 tst_res(TPASS, "fallocate(FALLOC_FL_PUNCH_HOLE)"); 80 81 ret = write(fd, buf, 10); 82 if (ret == -1) 83 tst_res(TFAIL | TERRNO, "write()"); 84 else 85 tst_res(TPASS, "write()"); 86 87 SAFE_CLOSE(fd); 88 } 89 90 static void cleanup(void) 91 { 92 if (fd > 0) 93 SAFE_CLOSE(fd); 94 } 95 96 static struct tst_test test = { 97 .needs_root = 1, 98 .needs_tmpdir = 1, 99 .mount_device = 1, 100 .mntpoint = MNTPOINT, 101 .all_filesystems = 1, 102 .cleanup = cleanup, 103 .test_all = run, 104 }; 105
