1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2012, Google Inc.
4 */
5
6 #include <common.h>
7 #include <fs.h>
8 #include <os.h>
9
sandbox_fs_set_blk_dev(struct blk_desc * rbdd,disk_partition_t * info)10 int sandbox_fs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info)
11 {
12 /*
13 * Only accept a NULL struct blk_desc for the sandbox, which is when
14 * hostfs interface is used
15 */
16 return rbdd != NULL;
17 }
18
sandbox_fs_read_at(const char * filename,loff_t pos,void * buffer,loff_t maxsize,loff_t * actread)19 int sandbox_fs_read_at(const char *filename, loff_t pos, void *buffer,
20 loff_t maxsize, loff_t *actread)
21 {
22 loff_t size;
23 int fd, ret;
24
25 fd = os_open(filename, OS_O_RDONLY);
26 if (fd < 0)
27 return fd;
28 ret = os_lseek(fd, pos, OS_SEEK_SET);
29 if (ret == -1) {
30 os_close(fd);
31 return ret;
32 }
33 if (!maxsize) {
34 ret = os_get_filesize(filename, &size);
35 if (ret) {
36 os_close(fd);
37 return ret;
38 }
39
40 maxsize = size;
41 }
42
43 size = os_read(fd, buffer, maxsize);
44 os_close(fd);
45
46 if (size < 0) {
47 ret = -1;
48 } else {
49 ret = 0;
50 *actread = size;
51 }
52
53 return ret;
54 }
55
sandbox_fs_write_at(const char * filename,loff_t pos,void * buffer,loff_t towrite,loff_t * actwrite)56 int sandbox_fs_write_at(const char *filename, loff_t pos, void *buffer,
57 loff_t towrite, loff_t *actwrite)
58 {
59 ssize_t size;
60 int fd, ret;
61
62 fd = os_open(filename, OS_O_RDWR | OS_O_CREAT);
63 if (fd < 0)
64 return fd;
65 ret = os_lseek(fd, pos, OS_SEEK_SET);
66 if (ret == -1) {
67 os_close(fd);
68 return ret;
69 }
70 size = os_write(fd, buffer, towrite);
71 os_close(fd);
72
73 if (size == -1) {
74 ret = -1;
75 } else {
76 ret = 0;
77 *actwrite = size;
78 }
79
80 return ret;
81 }
82
sandbox_fs_ls(const char * dirname)83 int sandbox_fs_ls(const char *dirname)
84 {
85 struct os_dirent_node *head, *node;
86 int ret;
87
88 ret = os_dirent_ls(dirname, &head);
89 if (ret)
90 goto out;
91
92 for (node = head; node; node = node->next) {
93 printf("%s %10lu %s\n", os_dirent_get_typename(node->type),
94 node->size, node->name);
95 }
96 out:
97 os_dirent_free(head);
98
99 return ret;
100 }
101
sandbox_fs_exists(const char * filename)102 int sandbox_fs_exists(const char *filename)
103 {
104 loff_t size;
105 int ret;
106
107 ret = os_get_filesize(filename, &size);
108 return ret == 0;
109 }
110
sandbox_fs_size(const char * filename,loff_t * size)111 int sandbox_fs_size(const char *filename, loff_t *size)
112 {
113 return os_get_filesize(filename, size);
114 }
115
sandbox_fs_close(void)116 void sandbox_fs_close(void)
117 {
118 }
119
fs_read_sandbox(const char * filename,void * buf,loff_t offset,loff_t len,loff_t * actread)120 int fs_read_sandbox(const char *filename, void *buf, loff_t offset, loff_t len,
121 loff_t *actread)
122 {
123 int ret;
124
125 ret = sandbox_fs_read_at(filename, offset, buf, len, actread);
126 if (ret)
127 printf("** Unable to read file %s **\n", filename);
128
129 return ret;
130 }
131
fs_write_sandbox(const char * filename,void * buf,loff_t offset,loff_t len,loff_t * actwrite)132 int fs_write_sandbox(const char *filename, void *buf, loff_t offset,
133 loff_t len, loff_t *actwrite)
134 {
135 int ret;
136
137 ret = sandbox_fs_write_at(filename, offset, buf, len, actwrite);
138 if (ret)
139 printf("** Unable to write file %s **\n", filename);
140
141 return ret;
142 }
143