1 /*
2 * Copyright (c) 2025 Antmicro <www.antmicro.com>
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <stdio.h>
8 #include <string.h>
9 #include <zephyr/device.h>
10 #include <zephyr/fs/fs.h>
11 #include <zephyr/fs/virtiofs.h>
12 #include <zephyr/kernel.h>
13
14 #define VIRTIO_DEV DEVICE_DT_GET(DT_NODELABEL(virtio_pci))
15
16 #define MOUNT_POINT "/virtiofs"
17
18 struct virtiofs_fs_data fs_data;
19
20 static struct fs_mount_t mp = {
21 .type = FS_VIRTIOFS,
22 .fs_data = &fs_data,
23 .flags = 0,
24 .storage_dev = (void *)VIRTIO_DEV,
25 .mnt_point = MOUNT_POINT,
26 };
27
dirtree(const char * path,int indent)28 void dirtree(const char *path, int indent)
29 {
30 struct fs_dir_t dir;
31
32 fs_dir_t_init(&dir);
33 if (fs_opendir(&dir, path) == 0) {
34 while (1) {
35 struct fs_dirent entry;
36
37 if (fs_readdir(&dir, &entry) == 0) {
38 if (entry.name[0] == '\0') {
39 break;
40 }
41 if (entry.type == FS_DIR_ENTRY_DIR) {
42 printf("%*s- %s (type=dir)\n", indent * 2, "", entry.name);
43 char *subdir_path = k_malloc(
44 strlen(path) + strlen(entry.name) + 2
45 );
46
47 if (subdir_path == NULL) {
48 printf("failed to allocate subdir path\n");
49 continue;
50 }
51 strcpy(subdir_path, path);
52 strcat(subdir_path, "/");
53 strcat(subdir_path, entry.name);
54 dirtree(subdir_path, indent + 1);
55 k_free(subdir_path);
56 } else {
57 printf(
58 "%*s- %s (type=file, size=%zu)\n",
59 indent * 2, "", entry.name, entry.size
60 );
61 }
62 } else {
63 printf("failed to readdir %s\n", path);
64 break;
65 }
66 };
67
68 fs_closedir(&dir);
69 } else {
70 printf("failed to opendir %s\n", path);
71 }
72 }
73
create_file(const char * path,const char * content)74 void create_file(const char *path, const char *content)
75 {
76 struct fs_file_t file;
77
78 fs_file_t_init(&file);
79 if (fs_open(&file, path, FS_O_CREATE | FS_O_WRITE) == 0) {
80 fs_write(&file, content, strlen(content) + 1);
81 } else {
82 printf("failed to create %s\n", path);
83 }
84 fs_close(&file);
85 }
86
print_file(const char * path)87 void print_file(const char *path)
88 {
89 struct fs_file_t file;
90
91 fs_file_t_init(&file);
92 if (fs_open(&file, path, FS_O_READ) == 0) {
93 char buf[256] = "\0";
94 int read_c = fs_read(&file, buf, sizeof(buf));
95
96 if (read_c >= 0) {
97 buf[read_c] = 0;
98
99 printf(
100 "%s content:\n"
101 "%s\n",
102 path, buf
103 );
104 } else {
105 printf("failed to read from %s\n", path);
106 }
107
108 fs_close(&file);
109 } else {
110 printf("failed to open %s\n", path);
111 }
112 }
113
main(void)114 int main(void)
115 {
116 if (fs_mount(&mp) == 0) {
117 printf("%s directory tree:\n", MOUNT_POINT);
118 dirtree(MOUNT_POINT, 0);
119 printf("\n");
120
121 print_file(MOUNT_POINT"/file");
122
123 create_file("/virtiofs/file_created_by_zephyr", "hello world\n");
124
125 create_file("/virtiofs/second_file_created_by_zephyr", "lorem ipsum\n");
126
127 fs_mkdir("/virtiofs/dir_created_by_zephyr");
128 } else {
129 printf("failed to mount %s\n", MOUNT_POINT);
130 }
131
132 return 0;
133 }
134
