10076 make usr/src/test smatch clean
1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2012 Jilin Xpd <jilinxpd@gmail.com>
14 * Copyright 2018 Nexenta Systems, Inc.
15 */
16
17 /*
18 * Using mmap, make a file and padding it with random chars.
19 */
20
21 #include <sys/mman.h>
22 #include <sys/types.h>
23 #include <sys/stat.h>
24 #include <fcntl.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <unistd.h>
28 #include <string.h>
29 #include <errno.h>
30 #include <time.h>
31
32 void
33 usage(void)
34 {
35 fprintf(stderr,
36 "usage: mkfile_mmap -n <size>[b|k|m|g] -f <filename>\n");
37 exit(1);
38 }
39
40 int
41 main(int argc, char **argv)
42 {
43 char *suffix;
44 char *filename = NULL;
45 char *file_addr;
46 char *p, *q;
47 off_t offset;
48 size_t filesize;
49 size_t blksize;
50 size_t numblks;
51 size_t cnt = 1;
52 size_t mul = 1;
53 size_t i;
54 int mret = 0;
55 int c, fid;
56
57 /*
58 * parse arguments
59 */
60 while ((c = getopt(argc, argv, "n:f:")) != -1) {
61 switch (c) {
62 case 'n':
63 cnt = (size_t)strtoul(optarg, &suffix, 0);
64 if (cnt == 0)
65 goto bad_n_arg;
66 switch (*suffix) {
67 case '\0':
68 case 'b':
69 mul = 1;
70 break;
71 case 'k':
72 mul = 1024;
73 break;
74 case 'm':
75 mul = (1024 * 1024);
76 break;
77 case 'g':
78 mul = (1024 * 1024 * 1024);
79 break;
80 default:
81 bad_n_arg:
82 fprintf(stderr, "-n %s: invalid size\n",
83 optarg);
84 return (1);
85 }
86 cnt = cnt * mul;
87 break;
88
89 case 'f': /* target file */
90 filename = optarg;
91 break;
92
93 case ':': /* missing optarg */
94 fprintf(stderr,
95 "Option -%c requires an arg\n", optopt);
96 usage();
97 break;
98 case '?':
99 fprintf(stderr,
100 "Unrecognized option: -%c\n", optopt);
101 usage();
102 break;
103 }
104 }
105
106 /* open test file */
107 fid = open(filename, O_RDWR | O_CREAT | O_TRUNC,
108 S_IRUSR | S_IWUSR | S_IROTH | S_IWOTH);
109 if (fid == -1) {
110 fprintf(stderr, "open %s error=%d\n", filename, errno);
111 mret = 1;
112 goto exit3;
113 }
114
115 /* extend file */
116 filesize = cnt;
117 if (ftruncate(fid, filesize) == -1) {
118 fprintf(stderr, "ftrunc %s error=%d\n", filename, errno);
119 mret = 1;
120 goto exit2;
121 }
122
123 #define K 1024
124
125 blksize = 64 * K * K;
126 numblks = (filesize + blksize - 1) / blksize;
127 for (i = 0; i < numblks && mret == 0; i++) {
128
129 offset = i*blksize;
130 if (offset + blksize > filesize)
131 blksize = filesize - offset;
132
133 /* map file */
134 file_addr = mmap(NULL, blksize,
135 PROT_READ | PROT_WRITE, MAP_SHARED, fid, offset);
136 if (file_addr == MAP_FAILED) {
137 fprintf(stderr, "mmap %s error=%d\n", filename, errno);
138 mret = 1;
139 break;
140 }
141
142 /* tag each block (to aid debug) */
143 p = file_addr;
144 q = file_addr + blksize - K;
145 memset(p, ' ', K);
146 snprintf(p, K, "\nblk=%d\n\n", i);
147 p += K;
148
149 /* fill something into mapped addr */
150 while (p < q) {
151 memset(p, ' ', K);
152 snprintf(p, K, "\noff=0x%x\n\n",
153 (i * blksize) + (p - file_addr));
154 p += K;
155 }
156
157 /* sync mapped pages to file */
158 if (msync(file_addr, blksize, MS_SYNC) == -1) {
159 fprintf(stderr, "msync %s error=%d\n", filename, errno);
160 mret = 1;
161 }
162
163 /* unmap file */
164 if (munmap(file_addr, blksize) == -1) {
165 fprintf(stderr, "unmap %s error=%d\n", filename, errno);
166 mret = 1;
167 }
168 }
169
170 /* close file */
171 exit2:
172 close(fid);
173 exit3:
174 return (mret);
175 }
--- EOF ---