Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 1 | /* |
| 2 | * zram: generic RAM based compressed R/W block devices |
| 3 | * http://lkml.org/lkml/2010/8/9/227 |
| 4 | * |
| 5 | * Copyright (C) 2010 Red Hat, Inc. |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of version 2 of the GNU General Public |
| 8 | * License as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it would be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 13 | * |
| 14 | * Further, this software is distributed without any warranty that it |
| 15 | * is free of the rightful claim of any third person regarding |
| 16 | * infringement or the like. Any license provided herein, whether |
| 17 | * implied or otherwise, applies only to this software file. Patent |
| 18 | * licenses, if any, provided herein do not apply to combinations of |
| 19 | * this program with other software, or any other product whatsoever. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write the Free Software |
| 23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 24 | * 02110-1301, USA. |
| 25 | */ |
| 26 | #include <sys/types.h> |
| 27 | #include <sys/stat.h> |
| 28 | #include <sys/mman.h> |
Caspar Zhang | 79667fa | 2012-03-12 14:41:46 +0800 | [diff] [blame] | 29 | #include <errno.h> |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 30 | #include <fcntl.h> |
| 31 | #include <stdio.h> |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 32 | #include <string.h> |
Caspar Zhang | 79667fa | 2012-03-12 14:41:46 +0800 | [diff] [blame] | 33 | #include <unistd.h> |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 34 | #include "test.h" |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 35 | |
| 36 | char *TCID = "zram01"; |
| 37 | int TST_TOTAL = 1; |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 38 | |
| 39 | #define PATH_ZRAM "/sys/block/zram0" |
Caspar Zhang | a4ef133 | 2011-12-23 01:45:32 +0800 | [diff] [blame] | 40 | #define SIZE (512 * 1024 * 1024L) |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 41 | #define DEVICE "/dev/zram0" |
| 42 | |
Caspar Zhang | 79667fa | 2012-03-12 14:41:46 +0800 | [diff] [blame] | 43 | static int modprobe; |
| 44 | |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 45 | static void set_disksize(void); |
Caspar Zhang | 039c371 | 2011-11-17 12:25:22 +0800 | [diff] [blame] | 46 | static void write_device(void); |
Caspar Zhang | 1042546 | 2011-12-23 01:34:16 +0800 | [diff] [blame] | 47 | static void verify_device(void); |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 48 | static void reset(void); |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 49 | static void setup(void); |
| 50 | static void cleanup(void); |
| 51 | static void print(char *string); |
| 52 | static void dump_info(void); |
| 53 | |
| 54 | int main(int argc, char *argv[]) |
| 55 | { |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 56 | int lc; |
Cyril Hrubis | 0b9589f | 2014-05-27 17:40:33 +0200 | [diff] [blame] | 57 | const char *msg; |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 58 | |
| 59 | msg = parse_opts(argc, argv, NULL, NULL); |
| 60 | if (msg != NULL) |
| 61 | tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| 62 | |
| 63 | setup(); |
| 64 | |
| 65 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
Caspar Zhang | d59a659 | 2013-03-07 14:59:12 +0800 | [diff] [blame] | 66 | tst_count = 0; |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 67 | |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 68 | set_disksize(); |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 69 | |
Caspar Zhang | 039c371 | 2011-11-17 12:25:22 +0800 | [diff] [blame] | 70 | write_device(); |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 71 | dump_info(); |
Caspar Zhang | 1042546 | 2011-12-23 01:34:16 +0800 | [diff] [blame] | 72 | verify_device(); |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 73 | |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 74 | reset(); |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 75 | dump_info(); |
| 76 | } |
| 77 | cleanup(); |
| 78 | tst_exit(); |
| 79 | } |
| 80 | |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 81 | static void set_disksize(void) |
| 82 | { |
| 83 | int fd; |
| 84 | char size[BUFSIZ]; |
| 85 | |
Caspar Zhang | a4ef133 | 2011-12-23 01:45:32 +0800 | [diff] [blame] | 86 | tst_resm(TINFO, "create a zram device with %ld bytes in size.", SIZE); |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 87 | fd = open(PATH_ZRAM "/disksize", O_WRONLY); |
| 88 | if (fd == -1) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 89 | tst_brkm(TBROK | TERRNO, cleanup, "open %s", |
| 90 | PATH_ZRAM "/disksize"); |
Caspar Zhang | a4ef133 | 2011-12-23 01:45:32 +0800 | [diff] [blame] | 91 | sprintf(size, "%ld", SIZE); |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 92 | if (write(fd, size, strlen(size)) != strlen(size)) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 93 | tst_brkm(TBROK | TERRNO, cleanup, "write %s to %s", size, |
| 94 | PATH_ZRAM "/disksize"); |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 95 | close(fd); |
| 96 | } |
| 97 | |
Caspar Zhang | 039c371 | 2011-11-17 12:25:22 +0800 | [diff] [blame] | 98 | static void write_device(void) |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 99 | { |
| 100 | int fd; |
Caspar Zhang | 1042546 | 2011-12-23 01:34:16 +0800 | [diff] [blame] | 101 | char *s; |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 102 | |
| 103 | tst_resm(TINFO, "map it into memory."); |
| 104 | fd = open(DEVICE, O_RDWR); |
| 105 | if (fd == -1) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 106 | tst_brkm(TBROK | TERRNO, cleanup, "open %s", DEVICE); |
| 107 | s = mmap(NULL, SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 108 | if (s == MAP_FAILED) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 109 | tst_brkm(TBROK | TERRNO, cleanup, "mmap"); |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 110 | |
| 111 | tst_resm(TINFO, "write all the memory."); |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 112 | memset(s, 'a', SIZE - 1); |
| 113 | s[SIZE - 1] = '\0'; |
Caspar Zhang | 96cdfb7 | 2011-11-17 12:27:01 +0800 | [diff] [blame] | 114 | |
| 115 | if (munmap(s, SIZE) == -1) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 116 | tst_brkm(TBROK | TERRNO, cleanup, "munmap"); |
Caspar Zhang | 96cdfb7 | 2011-11-17 12:27:01 +0800 | [diff] [blame] | 117 | |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 118 | close(fd); |
| 119 | } |
| 120 | |
Caspar Zhang | 1042546 | 2011-12-23 01:34:16 +0800 | [diff] [blame] | 121 | static void verify_device(void) |
| 122 | { |
Caspar Zhang | a4ef133 | 2011-12-23 01:45:32 +0800 | [diff] [blame] | 123 | int fd; |
| 124 | long i, fail; |
Caspar Zhang | 1042546 | 2011-12-23 01:34:16 +0800 | [diff] [blame] | 125 | char *s; |
| 126 | |
| 127 | tst_resm(TINFO, "verify contents from device."); |
| 128 | fd = open(DEVICE, O_RDONLY); |
| 129 | if (fd == -1) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 130 | tst_brkm(TBROK | TERRNO, cleanup, "open %s", DEVICE); |
Caspar Zhang | 1042546 | 2011-12-23 01:34:16 +0800 | [diff] [blame] | 131 | s = mmap(NULL, SIZE, PROT_READ, MAP_PRIVATE, fd, 0); |
| 132 | if (s == MAP_FAILED) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 133 | tst_brkm(TBROK | TERRNO, cleanup, "2nd mmap"); |
Caspar Zhang | 1042546 | 2011-12-23 01:34:16 +0800 | [diff] [blame] | 134 | |
| 135 | i = 0; |
| 136 | fail = 0; |
| 137 | while (s[i] && i < SIZE - 1) { |
| 138 | if (s[i] != 'a') |
| 139 | fail++; |
| 140 | i++; |
| 141 | } |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 142 | if (i != SIZE - 1) |
Caspar Zhang | a4ef133 | 2011-12-23 01:45:32 +0800 | [diff] [blame] | 143 | tst_resm(TFAIL, "expect size: %ld, actual size: %ld.", |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 144 | SIZE - 1, i); |
Caspar Zhang | 1042546 | 2011-12-23 01:34:16 +0800 | [diff] [blame] | 145 | else if (s[i] != '\0') |
| 146 | tst_resm(TFAIL, "zram device seems not null terminated"); |
| 147 | if (fail) |
Caspar Zhang | a4ef133 | 2011-12-23 01:45:32 +0800 | [diff] [blame] | 148 | tst_resm(TFAIL, "%ld failed bytes found.", fail); |
Caspar Zhang | 1042546 | 2011-12-23 01:34:16 +0800 | [diff] [blame] | 149 | if (munmap(s, SIZE) == -1) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 150 | tst_brkm(TBROK | TERRNO, cleanup, "2nd munmap"); |
Caspar Zhang | 1042546 | 2011-12-23 01:34:16 +0800 | [diff] [blame] | 151 | |
| 152 | close(fd); |
| 153 | } |
| 154 | |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 155 | static void reset(void) |
| 156 | { |
| 157 | int fd; |
| 158 | |
| 159 | tst_resm(TINFO, "reset it."); |
| 160 | fd = open(PATH_ZRAM "/reset", O_WRONLY); |
| 161 | if (fd == -1) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 162 | tst_brkm(TBROK | TERRNO, cleanup, "open %s", |
| 163 | PATH_ZRAM "/reset"); |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 164 | if (write(fd, "1", 1) != 1) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 165 | tst_brkm(TBROK | TERRNO, cleanup, "write 1 to %s", |
| 166 | PATH_ZRAM "/reset"); |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 167 | close(fd); |
| 168 | } |
| 169 | |
| 170 | static void setup(void) |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 171 | { |
Caspar Zhang | e99867a | 2011-11-17 12:00:26 +0800 | [diff] [blame] | 172 | int retried = 0; |
| 173 | |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 174 | tst_require_root(NULL); |
| 175 | |
Caspar Zhang | e99867a | 2011-11-17 12:00:26 +0800 | [diff] [blame] | 176 | retry: |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 177 | if (access(PATH_ZRAM, R_OK | W_OK | X_OK) == -1) { |
Caspar Zhang | e99867a | 2011-11-17 12:00:26 +0800 | [diff] [blame] | 178 | if (errno == ENOENT) { |
| 179 | if (retried) |
| 180 | tst_brkm(TCONF, NULL, |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 181 | "system has no zram device."); |
Caspar Zhang | e99867a | 2011-11-17 12:00:26 +0800 | [diff] [blame] | 182 | system("modprobe zram"); |
| 183 | modprobe = 1; |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 184 | retried = 1; |
Caspar Zhang | e99867a | 2011-11-17 12:00:26 +0800 | [diff] [blame] | 185 | goto retry; |
| 186 | } else |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 187 | tst_brkm(TBROK | TERRNO, NULL, "access"); |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 188 | } |
Caspar Zhang | e99867a | 2011-11-17 12:00:26 +0800 | [diff] [blame] | 189 | |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 190 | tst_sig(FORK, DEF_HANDLER, cleanup); |
| 191 | TEST_PAUSE; |
| 192 | } |
| 193 | |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 194 | static void cleanup(void) |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 195 | { |
| 196 | if (modprobe == 1) |
| 197 | system("rmmod zram"); |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 198 | } |
| 199 | |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 200 | static void print(char *string) |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 201 | { |
| 202 | FILE *fp; |
| 203 | char buf[BUFSIZ], value[BUFSIZ]; |
| 204 | |
| 205 | sprintf(buf, "%s/%s", PATH_ZRAM, string); |
| 206 | fp = fopen(buf, "r"); |
| 207 | if (fp == NULL) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 208 | tst_brkm(TBROK | TERRNO, cleanup, "fopen %s", buf); |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 209 | |
| 210 | if (fgets(value, BUFSIZ, fp) == NULL) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 211 | tst_brkm(TBROK | TERRNO, cleanup, "fgets %s", buf); |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 212 | value[strlen(value) - 1] = '\0'; |
| 213 | fclose(fp); |
| 214 | |
| 215 | tst_resm(TINFO, "%s is %s", buf, value); |
| 216 | } |
| 217 | |
Caspar Zhang | 37b5813 | 2011-11-17 12:13:49 +0800 | [diff] [blame] | 218 | static void dump_info(void) |
Garrett Cooper | ecd667e | 2011-01-19 01:06:18 -0800 | [diff] [blame] | 219 | { |
| 220 | print("initstate"); |
| 221 | print("compr_data_size"); |
| 222 | print("orig_data_size"); |
| 223 | print("disksize"); |
| 224 | print("mem_used_total"); |
| 225 | print("num_reads"); |
| 226 | print("num_writes"); |
| 227 | print("zero_pages"); |
| 228 | } |