sandboxfs.c
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/*
* Copyright (c) 2012, Google Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <fs.h>
#include <os.h>
int sandbox_fs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info)
{
/*
* Only accept a NULL struct blk_desc for the sandbox, which is when
* hostfs interface is used
*/
return rbdd != NULL;
}
int sandbox_fs_read_at(const char *filename, loff_t pos, void *buffer,
loff_t maxsize, loff_t *actread)
{
loff_t size;
int fd, ret;
fd = os_open(filename, OS_O_RDONLY);
if (fd < 0)
return fd;
ret = os_lseek(fd, pos, OS_SEEK_SET);
if (ret == -1) {
os_close(fd);
return ret;
}
if (!maxsize) {
ret = os_get_filesize(filename, &size);
if (ret) {
os_close(fd);
return ret;
}
maxsize = size;
}
size = os_read(fd, buffer, maxsize);
os_close(fd);
if (size < 0) {
ret = -1;
} else {
ret = 0;
*actread = size;
}
return ret;
}
int sandbox_fs_write_at(const char *filename, loff_t pos, void *buffer,
loff_t towrite, loff_t *actwrite)
{
ssize_t size;
int fd, ret;
fd = os_open(filename, OS_O_RDWR | OS_O_CREAT);
if (fd < 0)
return fd;
ret = os_lseek(fd, pos, OS_SEEK_SET);
if (ret == -1) {
os_close(fd);
return ret;
}
size = os_write(fd, buffer, towrite);
os_close(fd);
if (size == -1) {
ret = -1;
} else {
ret = 0;
*actwrite = size;
}
return ret;
}
int sandbox_fs_ls(const char *dirname)
{
struct os_dirent_node *head, *node;
int ret;
ret = os_dirent_ls(dirname, &head);
if (ret)
goto out;
for (node = head; node; node = node->next) {
printf("%s %10lu %s\n", os_dirent_get_typename(node->type),
node->size, node->name);
}
out:
os_dirent_free(head);
return ret;
}
int sandbox_fs_exists(const char *filename)
{
loff_t size;
int ret;
ret = os_get_filesize(filename, &size);
return ret == 0;
}
int sandbox_fs_size(const char *filename, loff_t *size)
{
return os_get_filesize(filename, size);
}
void sandbox_fs_close(void)
{
}
int fs_read_sandbox(const char *filename, void *buf, loff_t offset, loff_t len,
loff_t *actread)
{
int ret;
ret = sandbox_fs_read_at(filename, offset, buf, len, actread);
if (ret)
printf("** Unable to read file %s **\n", filename);
return ret;
}
int fs_write_sandbox(const char *filename, void *buf, loff_t offset,
loff_t len, loff_t *actwrite)
{
int ret;
ret = sandbox_fs_write_at(filename, offset, buf, len, actwrite);
if (ret)
printf("** Unable to write file %s **\n", filename);
return ret;
}