1 /* IBM Corporation */
2 /* 01/02/2003 Port to LTP avenkat@us.ibm.com */
3 /* 06/30/2001 Port to Linux nsharoff@us.ibm.com */
4
5 /*
6 * Copyright (c) International Business Machines Corp., 2003
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
16 * the GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /*
24 * weave:
25 * Mmap parts of a file, and then write to the file causing single
26 * write requests to jump back and forth between mmaped io and regular io.
27 *
28 * Usage: weave filename startoffset. pageoffset = 4096.
29 *
30 * startoffset specifies a byte count in the file at which to begin
31 * the test. When this value is non-zero, a sparse file is created.
32 * This is useful for testing with large files.
33 *
34 * Compile with -DLARGE_FILE to enable file sizes > 2 GB.
35 */
36
37 #include <sys/types.h>
38 #include <sys/mman.h>
39 #include <unistd.h>
40 #include <errno.h>
41 #include <fcntl.h>
42 #include <signal.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 /***** LTP Port *****/
46 #include "test.h"
47 #define FAILED 0
48 #define PASSED 1
49 /***** ** ** *****/
50
51 #define CLEAN (void)close(rofd); \
52 (void)close(rwfd); \
53 (void)unlink(filename);
54 #define ERROR(M) (void)fprintf(stderr, "%s: errno = %d; " M "\n", \
55 argv[0], errno)
56 #define CLEANERROR(M) CLEAN; ERROR(M)
57 #define CATCH_SIG(SIG) \
58 if (sigaction(SIG, &sa, 0) == -1) { \
59 ERROR("couldn't catch signal " #SIG); \
60 exit(1); \
61 }
62
63 static char *filename;
64
65 /***** LTP Port *****/
66 char *TCID = "mmapstress04"; //weave
67 int local_flag = PASSED;
68 int block_number;
69 FILE *temp;
70 int TST_TOTAL = 1;
71
72 int anyfail();
73 int blenter();
74 int blexit();
75 int instress();
76 void setup();
77 void terror();
78 void fail_exit();
79 void ok_exit();
80 /***** ** ** *****/
81
82 extern time_t time(time_t *);
83 extern char *ctime(const time_t *);
84 extern void exit(int);
85 static int rofd, rwfd;
86
87 /*ARGSUSED*/ static
cleanup(int sig)88 void cleanup(int sig)
89 {
90 /*
91 * Don't check error codes - we could be signaled before the file is
92 * created.
93 */
94 (void)close(rofd);
95 (void)close(rwfd);
96 (void)unlink(filename);
97 exit(1);
98 }
99
main(int argc,char * argv[])100 int main(int argc, char *argv[])
101 {
102 char *buf;
103 size_t pagesize = (size_t) sysconf(_SC_PAGE_SIZE);
104 caddr_t mmapaddr;
105 time_t t;
106 int i, j;
107 struct sigaction sa;
108 #ifdef LARGE_FILE
109 off64_t startoffset;
110 off64_t seekoff;
111 off64_t mapoff;
112 #else /* LARGE_FILE */
113 off_t startoffset;
114 off_t seekoff;
115 off_t mapoff;
116 #endif /* LARGE_FILE */
117
118 if (argc < 2 || argc > 3) {
119 (void)fprintf(stderr, "Usage: %s filename startoffset\n",
120 argv[0]);
121 return 1;
122 }
123 filename = argv[1];
124
125 if (argc >= 3) {
126 #ifdef LARGE_FILE
127 startoffset = atoll(argv[2]);
128 #else /* LARGE_FILE */
129 startoffset = atoi(argv[2]);
130 #endif /* LARGE_FILE */
131 } else
132 startoffset = pagesize;
133
134 if (startoffset % pagesize != 0) {
135 fprintf(stderr, "pagesize=%ld\n", (long)pagesize);
136 fprintf(stderr, "startoffset must be a pagesize multiple\n");
137 anyfail(); //LTP Port
138 }
139 (void)time(&t);
140 // (void)printf("%s: Started %s", argv[0], ctime(&t));
141 if ((buf = sbrk(6 * pagesize)) == (char *)-1) {
142 ERROR("couldn't allocate buf");
143 anyfail(); //LTP Port
144 }
145 if (sbrk(pagesize - ((ulong) sbrk(0) & (pagesize - 1))) == (char *)-1) {
146 ERROR("couldn't round up brk");
147 anyfail(); //LTP Port
148 }
149 if ((mmapaddr = (caddr_t) sbrk(0)) == (caddr_t) - 1) {
150 ERROR("couldn't find top of brk");
151 anyfail(); //LTP Port
152 }
153 sa.sa_handler = cleanup;
154 sa.sa_flags = 0;
155 if (sigemptyset(&sa.sa_mask)) {
156 ERROR("sigemptyset failed");
157 anyfail(); //LTP Port
158 }
159 CATCH_SIG(SIGINT);
160 CATCH_SIG(SIGQUIT);
161 CATCH_SIG(SIGTERM);
162 tst_tmpdir();
163 #ifdef LARGE_FILE
164 if ((rofd = open64(filename, O_RDONLY | O_CREAT, 0777)) == -1) {
165 #else /* LARGE_FILE */
166 if ((rofd = open(filename, O_RDONLY | O_CREAT, 0777)) == -1) {
167 #endif /* LARGE_FILE */
168 ERROR("read only open failed");
169 anyfail(); //LTP Port
170 }
171 #ifdef LARGE_FILE
172 if ((rwfd = open64(filename, O_RDWR)) == -1) {
173 #else /* LARGE_FILE */
174 if ((rwfd = open(filename, O_RDWR)) == -1) {
175 #endif /* LARGE_FILE */
176 (void)close(rofd);
177 (void)unlink(filename);
178 ERROR("read/write open failed");
179 anyfail(); //LTP Port
180 }
181 #ifdef LARGE_FILE
182 seekoff = startoffset + (off64_t) 64 *(off64_t) 6 *(off64_t) pagesize;
183 if (lseek64(rwfd, seekoff, SEEK_SET) != seekoff) {
184 #else /* LARGE_FILE */
185 seekoff = startoffset + (off_t) 64 *(off_t) 6 *(off_t) pagesize;
186 if (lseek(rwfd, seekoff, SEEK_SET) != seekoff) {
187 #endif /* LARGE_FILE */
188 CLEANERROR("first lseek failed");
189 anyfail(); //LTP Port
190 }
191 i = 0;
192 while (i < pagesize && write(rwfd, "b", 1) == 1)
193 i++;
194 if (i != pagesize) {
195 CLEANERROR("write to extend file failed");
196 anyfail(); //LTP Port
197 }
198 /* The file is now really big, and empty.
199 * Assuming disk blocks are 8k, and logical pages are 4k, there are
200 * two maps per page. In order to test mapping at the beginning and
201 * ends of the block, mapping the whole block, or none of the block
202 * with different mappings on preceding and following blocks, each
203 * 3 blocks with 6 pages can be thought of as a binary number from 0 to
204 * 64 with a bit set for mapped or cleared for unmapped. This number
205 * is represented by i. The value j is used to look at the bits of i
206 * and decided to map the page or not.
207 * NOTE: None of the above assumptions are critical.
208 */
209 for (i = 0; i < 64; i++) {
210 for (j = 0; j < 6; j++) {
211 if (i & (1 << j)) {
212 #ifdef LARGE_FILE
213 mapoff = startoffset +
214 (off64_t) pagesize *(off64_t) (6 + i + j);
215 if (mmap64(mmapaddr + pagesize * (6 * i + j),
216 pagesize, PROT_READ,
217 MAP_FILE | MAP_PRIVATE | MAP_FIXED,
218 rofd, mapoff)
219 == (caddr_t) - 1) {
220 #else /* LARGE_FILE */
221 mapoff = startoffset +
222 (off_t) pagesize *(off_t) (6 + i + j);
223 if (mmap(mmapaddr + pagesize * (6 * i + j),
224 pagesize, PROT_READ,
225 MAP_FILE | MAP_PRIVATE | MAP_FIXED,
226 rofd, mapoff)
227 == (caddr_t) - 1) {
228 #endif /* LARGE_FILE */
229 CLEANERROR("mmap failed");
230 anyfail(); //LTP Port
231 }
232 }
233 }
234 }
235 /* done mapping */
236 for (i = 0; i < 6 * pagesize; i++)
237 buf[i] = 'a';
238 /* write out 6 pages of stuff into each of the 64 six page sections */
239 #ifdef LARGE_FILE
240 if (lseek64(rwfd, startoffset, SEEK_SET) != startoffset) {
241 #else /* LARGE_FILE */
242 if (lseek(rwfd, startoffset, SEEK_SET) != startoffset) {
243 #endif /* LARGE_FILE */
244 CLEANERROR("second lseek failed");
245 anyfail(); //LTP Port
246 }
247 for (i = 0; i < 64; i++) {
248 if (write(rwfd, buf, 6 * pagesize) != 6 * pagesize) {
249 CLEANERROR("write failed");
250 anyfail(); //LTP Port
251 }
252 }
253 /* Just finished scribbling all over interwoven mmapped and unmapped
254 * regions.
255 */
256 for (i = 0; i < 64; i++) {
257 for (j = 0; j < 6; j++) {
258 /* if mmaped && not updated */
259 if ((i & (1 << j))
260 && *(mmapaddr + pagesize * (6 * i + j)) != 'a') {
261 CLEANERROR("'a' missing from mmap");
262 (void)fprintf(stderr, "i=%d\nj=%d\n"
263 "val=0x%x\n", i, j,
264 (int)(*
265 (mmapaddr +
266 pagesize * (6 * i + j))));
267 anyfail(); //LTP Port
268 }
269 }
270 }
271 /* Just checked to see that each mmapped page at least had an 'a' at
272 * the beginning.
273 */
274 CLEAN;
275 (void)time(&t);
276 // (void)printf("%s: Finished %s", argv[0], ctime(&t)); LTP Port
277 (local_flag == FAILED) ? tst_resm(TFAIL, "Test failed\n") : tst_resm(TPASS, "Test passed\n"); //LTP Port
278 tst_rmdir();
279 tst_exit(); //LTP Port
280
281 tst_exit();
282 }
283
284 /***** LTP Port *****/
285 int anyfail(void)
286 {
287 tst_brkm(TFAIL, tst_rmdir, "Test failed\n");
288 }
289
290 /***** ** ** *****/
291