Xiaoguang Wang | 3db2082 | 2014-06-09 15:37:10 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2014 Fujitsu Ltd. |
| 3 | * Author: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of version 2 of the GNU General Public License as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it would be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | */ |
| 17 | |
| 18 | #include <string.h> |
| 19 | #include <errno.h> |
| 20 | #include <sys/types.h> |
| 21 | #include <sys/stat.h> |
| 22 | #include <unistd.h> |
| 23 | |
| 24 | #include "test.h" |
| 25 | #include "usctest.h" |
| 26 | #include "safe_macros.h" |
| 27 | |
| 28 | #define MAX_SANE_HARD_LINKS 65535 |
| 29 | |
| 30 | int tst_fs_fill_hardlinks(void (*cleanup) (void), const char *dir) |
| 31 | { |
| 32 | unsigned int i, j; |
| 33 | char base_filename[PATH_MAX], link_filename[PATH_MAX]; |
| 34 | struct stat s; |
| 35 | |
| 36 | if (stat(dir, &s) == -1 && errno == ENOENT) |
| 37 | SAFE_MKDIR(cleanup, dir, 0744); |
| 38 | |
| 39 | SAFE_STAT(cleanup, dir, &s); |
| 40 | if (!S_ISDIR(s.st_mode)) |
| 41 | tst_brkm(TBROK, cleanup, "%s is not directory", dir); |
| 42 | |
| 43 | sprintf(base_filename, "%s/testfile0", dir); |
| 44 | SAFE_TOUCH(cleanup, base_filename, 0644, NULL); |
| 45 | |
| 46 | for (i = 1; i < MAX_SANE_HARD_LINKS; i++) { |
| 47 | sprintf(link_filename, "%s/testfile%d", dir, i); |
| 48 | |
| 49 | if (link(base_filename, link_filename) == 0) |
| 50 | continue; |
| 51 | |
| 52 | switch (errno) { |
| 53 | case EMLINK: |
| 54 | SAFE_STAT(cleanup, base_filename, &s); |
| 55 | if (s.st_nlink != i) { |
| 56 | tst_brkm(TBROK, cleanup, "wrong number of " |
| 57 | "hard links for %s have %i, should be" |
| 58 | " %d", base_filename, |
| 59 | (int)s.st_nlink, i); |
| 60 | } else { |
| 61 | tst_resm(TINFO, "the maximum number of hard " |
| 62 | "links to %s is hit: %d", |
| 63 | base_filename, (int)s.st_nlink); |
| 64 | return s.st_nlink; |
| 65 | } |
| 66 | case ENOSPC: |
| 67 | case EDQUOT: |
| 68 | tst_resm(TINFO | TERRNO, "link(%s, %s) failed", |
| 69 | base_filename, link_filename); |
| 70 | goto max_hardlinks_cleanup; |
| 71 | default: |
| 72 | tst_brkm(TBROK, cleanup, "link(%s, %s) failed " |
| 73 | "unexpectedly: %s", base_filename, |
| 74 | link_filename, strerror(errno)); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | tst_resm(TINFO, "Failed reach the hardlinks limit"); |
| 79 | |
| 80 | max_hardlinks_cleanup: |
| 81 | for (j = 0; j < i; j++) { |
| 82 | sprintf(link_filename, "%s/testfile%d", dir, j); |
| 83 | SAFE_UNLINK(cleanup, link_filename); |
| 84 | } |
| 85 | |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | int tst_fs_fill_subdirs(void (*cleanup) (void), const char *dir) |
| 90 | { |
| 91 | unsigned int i, j; |
| 92 | char dirname[PATH_MAX]; |
| 93 | struct stat s; |
| 94 | |
| 95 | if (stat(dir, &s) == -1 && errno == ENOENT) |
| 96 | SAFE_MKDIR(cleanup, dir, 0744); |
| 97 | |
| 98 | SAFE_STAT(cleanup, dir, &s); |
| 99 | if (!S_ISDIR(s.st_mode)) |
| 100 | tst_brkm(TBROK, cleanup, "%s is not directory", dir); |
| 101 | |
| 102 | for (i = 0; i < MAX_SANE_HARD_LINKS; i++) { |
| 103 | sprintf(dirname, "%s/testdir%d", dir, i); |
| 104 | |
| 105 | if (mkdir(dirname, 0755) == 0) |
| 106 | continue; |
| 107 | |
| 108 | switch (errno) { |
| 109 | case EMLINK: |
| 110 | SAFE_STAT(cleanup, dir, &s); |
| 111 | /* |
| 112 | * i+2 because there are two links to each newly |
| 113 | * created directory (the '.' and link from parent dir) |
| 114 | */ |
| 115 | if (s.st_nlink != (i + 2)) { |
| 116 | tst_brkm(TBROK, cleanup, "%s link counts have" |
| 117 | "%d, should be %d", dir, |
| 118 | (int)s.st_nlink, i + 2); |
| 119 | } else { |
| 120 | tst_resm(TINFO, "the maximum subdirectories in " |
| 121 | "%s is hit: %d", dir, (int)s.st_nlink); |
| 122 | return s.st_nlink; |
| 123 | } |
| 124 | case ENOSPC: |
| 125 | case EDQUOT: |
| 126 | tst_resm(TINFO | TERRNO, "mkdir(%s, 0755) failed", |
| 127 | dirname); |
| 128 | goto max_subdirs_cleanup; |
| 129 | default: |
| 130 | tst_brkm(TBROK, cleanup, "mkdir(%s, 0755) failed " |
| 131 | "unexpectedly: %s", dirname, |
| 132 | strerror(errno)); |
| 133 | } |
| 134 | |
| 135 | } |
| 136 | |
| 137 | tst_resm(TINFO, "Failed reach the subdirs limit"); |
| 138 | |
| 139 | max_subdirs_cleanup: |
| 140 | for (j = 0; j < i; j++) { |
| 141 | sprintf(dirname, "%s/testdir%d", dir, j); |
| 142 | SAFE_RMDIR(cleanup, dirname); |
| 143 | } |
| 144 | |
| 145 | return 0; |
| 146 | } |