1 // SPDX-License-Identifier: GPL-2.0
2 #define _GNU_SOURCE
3 #define __EXPORTED_HEADERS__
4
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <unistd.h>
8 #include <string.h>
9 #include <errno.h>
10 #include <fcntl.h>
11 #include <malloc.h>
12
13 #include <sys/ioctl.h>
14 #include <sys/syscall.h>
15 #include <linux/memfd.h>
16 #include <linux/udmabuf.h>
17
18 #define TEST_PREFIX "drivers/dma-buf/udmabuf"
19 #define NUM_PAGES 4
20
memfd_create(const char * name,unsigned int flags)21 static int memfd_create(const char *name, unsigned int flags)
22 {
23 return syscall(__NR_memfd_create, name, flags);
24 }
25
main(int argc,char * argv[])26 int main(int argc, char *argv[])
27 {
28 struct udmabuf_create create;
29 int devfd, memfd, buf, ret;
30 off_t size;
31 void *mem;
32
33 devfd = open("/dev/udmabuf", O_RDWR);
34 if (devfd < 0) {
35 printf("%s: [skip,no-udmabuf]\n", TEST_PREFIX);
36 exit(77);
37 }
38
39 memfd = memfd_create("udmabuf-test", MFD_ALLOW_SEALING);
40 if (memfd < 0) {
41 printf("%s: [skip,no-memfd]\n", TEST_PREFIX);
42 exit(77);
43 }
44
45 ret = fcntl(memfd, F_ADD_SEALS, F_SEAL_SHRINK);
46 if (ret < 0) {
47 printf("%s: [skip,fcntl-add-seals]\n", TEST_PREFIX);
48 exit(77);
49 }
50
51
52 size = getpagesize() * NUM_PAGES;
53 ret = ftruncate(memfd, size);
54 if (ret == -1) {
55 printf("%s: [FAIL,memfd-truncate]\n", TEST_PREFIX);
56 exit(1);
57 }
58
59 memset(&create, 0, sizeof(create));
60
61 /* should fail (offset not page aligned) */
62 create.memfd = memfd;
63 create.offset = getpagesize()/2;
64 create.size = getpagesize();
65 buf = ioctl(devfd, UDMABUF_CREATE, &create);
66 if (buf >= 0) {
67 printf("%s: [FAIL,test-1]\n", TEST_PREFIX);
68 exit(1);
69 }
70
71 /* should fail (size not multiple of page) */
72 create.memfd = memfd;
73 create.offset = 0;
74 create.size = getpagesize()/2;
75 buf = ioctl(devfd, UDMABUF_CREATE, &create);
76 if (buf >= 0) {
77 printf("%s: [FAIL,test-2]\n", TEST_PREFIX);
78 exit(1);
79 }
80
81 /* should fail (not memfd) */
82 create.memfd = 0; /* stdin */
83 create.offset = 0;
84 create.size = size;
85 buf = ioctl(devfd, UDMABUF_CREATE, &create);
86 if (buf >= 0) {
87 printf("%s: [FAIL,test-3]\n", TEST_PREFIX);
88 exit(1);
89 }
90
91 /* should work */
92 create.memfd = memfd;
93 create.offset = 0;
94 create.size = size;
95 buf = ioctl(devfd, UDMABUF_CREATE, &create);
96 if (buf < 0) {
97 printf("%s: [FAIL,test-4]\n", TEST_PREFIX);
98 exit(1);
99 }
100
101 fprintf(stderr, "%s: ok\n", TEST_PREFIX);
102 close(buf);
103 close(memfd);
104 close(devfd);
105 return 0;
106 }
107