u-boot/fs/fs.c
Simon Glass 7eb2c8d573 sandbox: fs: Add support for saving files to host filesystem
This allows write of files from the host filesystem in sandbox. There is
currently no concept of overwriting the file and removing its existing
contents - all writing is done on top of what is there. This means that
writing 10 bytes to the start of a 1KB file will only update those 10
bytes, not truncate the file to 10 byte slong.

If the file does not exist it is created.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-05-01 11:17:21 -04:00

355 lines
7.4 KiB
C

/*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <common.h>
#include <part.h>
#include <ext4fs.h>
#include <fat.h>
#include <fs.h>
#include <sandboxfs.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
static block_dev_desc_t *fs_dev_desc;
static disk_partition_t fs_partition;
static int fs_type = FS_TYPE_ANY;
static inline int fs_probe_unsupported(block_dev_desc_t *fs_dev_desc,
disk_partition_t *fs_partition)
{
printf("** Unrecognized filesystem type **\n");
return -1;
}
static inline int fs_ls_unsupported(const char *dirname)
{
return -1;
}
static inline int fs_read_unsupported(const char *filename, void *buf,
int offset, int len)
{
return -1;
}
static inline int fs_write_unsupported(const char *filename, void *buf,
int offset, int len)
{
return -1;
}
static inline void fs_close_unsupported(void)
{
}
struct fstype_info {
int fstype;
int (*probe)(block_dev_desc_t *fs_dev_desc,
disk_partition_t *fs_partition);
int (*ls)(const char *dirname);
int (*read)(const char *filename, void *buf, int offset, int len);
int (*write)(const char *filename, void *buf, int offset, int len);
void (*close)(void);
};
static struct fstype_info fstypes[] = {
#ifdef CONFIG_FS_FAT
{
.fstype = FS_TYPE_FAT,
.probe = fat_set_blk_dev,
.close = fat_close,
.ls = file_fat_ls,
.read = fat_read_file,
},
#endif
#ifdef CONFIG_FS_EXT4
{
.fstype = FS_TYPE_EXT,
.probe = ext4fs_probe,
.close = ext4fs_close,
.ls = ext4fs_ls,
.read = ext4_read_file,
},
#endif
#ifdef CONFIG_SANDBOX
{
.fstype = FS_TYPE_SANDBOX,
.probe = sandbox_fs_set_blk_dev,
.close = sandbox_fs_close,
.ls = sandbox_fs_ls,
.read = fs_read_sandbox,
.write = fs_write_sandbox,
},
#endif
{
.fstype = FS_TYPE_ANY,
.probe = fs_probe_unsupported,
.close = fs_close_unsupported,
.ls = fs_ls_unsupported,
.read = fs_read_unsupported,
.write = fs_write_unsupported,
},
};
static struct fstype_info *fs_get_info(int fstype)
{
struct fstype_info *info;
int i;
for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes) - 1; i++, info++) {
if (fstype == info->fstype)
return info;
}
/* Return the 'unsupported' sentinel */
return info;
}
int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype)
{
struct fstype_info *info;
int part, i;
#ifdef CONFIG_NEEDS_MANUAL_RELOC
static int relocated;
if (!relocated) {
for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes);
i++, info++) {
info->probe += gd->reloc_off;
info->close += gd->reloc_off;
info->ls += gd->reloc_off;
info->read += gd->reloc_off;
info->write += gd->reloc_off;
}
relocated = 1;
}
#endif
part = get_device_and_partition(ifname, dev_part_str, &fs_dev_desc,
&fs_partition, 1);
if (part < 0)
return -1;
for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes); i++, info++) {
if (fstype != FS_TYPE_ANY && info->fstype != FS_TYPE_ANY &&
fstype != info->fstype)
continue;
if (!info->probe(fs_dev_desc, &fs_partition)) {
fs_type = info->fstype;
return 0;
}
}
return -1;
}
static void fs_close(void)
{
struct fstype_info *info = fs_get_info(fs_type);
info->close();
fs_type = FS_TYPE_ANY;
}
int fs_ls(const char *dirname)
{
int ret;
struct fstype_info *info = fs_get_info(fs_type);
ret = info->ls(dirname);
fs_type = FS_TYPE_ANY;
fs_close();
return ret;
}
int fs_read(const char *filename, ulong addr, int offset, int len)
{
struct fstype_info *info = fs_get_info(fs_type);
void *buf;
int ret;
/*
* We don't actually know how many bytes are being read, since len==0
* means read the whole file.
*/
buf = map_sysmem(addr, len);
ret = info->read(filename, buf, offset, len);
unmap_sysmem(buf);
/* If we requested a specific number of bytes, check we got it */
if (ret >= 0 && len && ret != len) {
printf("** Unable to read file %s **\n", filename);
ret = -1;
}
fs_close();
return ret;
}
int fs_write(const char *filename, ulong addr, int offset, int len)
{
struct fstype_info *info = fs_get_info(fs_type);
void *buf;
int ret;
/*
* We don't actually know how many bytes are being read, since len==0
* means read the whole file.
*/
buf = map_sysmem(addr, len);
ret = info->write(filename, buf, offset, len);
unmap_sysmem(buf);
/* If we requested a specific number of bytes, check we got it */
if (ret >= 0 && len && ret != len) {
printf("** Unable to write file %s **\n", filename);
ret = -1;
}
fs_close();
return ret;
}
int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype, int cmdline_base)
{
unsigned long addr;
const char *addr_str;
const char *filename;
unsigned long bytes;
unsigned long pos;
int len_read;
unsigned long time;
if (argc < 2)
return CMD_RET_USAGE;
if (argc > 7)
return CMD_RET_USAGE;
if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
return 1;
if (argc >= 4) {
addr = simple_strtoul(argv[3], NULL, cmdline_base);
} else {
addr_str = getenv("loadaddr");
if (addr_str != NULL)
addr = simple_strtoul(addr_str, NULL, 16);
else
addr = CONFIG_SYS_LOAD_ADDR;
}
if (argc >= 5) {
filename = argv[4];
} else {
filename = getenv("bootfile");
if (!filename) {
puts("** No boot file defined **\n");
return 1;
}
}
if (argc >= 6)
bytes = simple_strtoul(argv[5], NULL, cmdline_base);
else
bytes = 0;
if (argc >= 7)
pos = simple_strtoul(argv[6], NULL, cmdline_base);
else
pos = 0;
time = get_timer(0);
len_read = fs_read(filename, addr, pos, bytes);
time = get_timer(time);
if (len_read <= 0)
return 1;
printf("%d bytes read in %lu ms", len_read, time);
if (time > 0) {
puts(" (");
print_size(len_read / time * 1000, "/s");
puts(")");
}
puts("\n");
setenv_hex("filesize", len_read);
return 0;
}
int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype)
{
if (argc < 2)
return CMD_RET_USAGE;
if (argc > 4)
return CMD_RET_USAGE;
if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
return 1;
if (fs_ls(argc >= 4 ? argv[3] : "/"))
return 1;
return 0;
}
int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype, int cmdline_base)
{
unsigned long addr;
const char *filename;
unsigned long bytes;
unsigned long pos;
int len;
unsigned long time;
if (argc < 6 || argc > 7)
return CMD_RET_USAGE;
if (fs_set_blk_dev(argv[1], argv[2], fstype))
return 1;
filename = argv[3];
addr = simple_strtoul(argv[4], NULL, cmdline_base);
bytes = simple_strtoul(argv[5], NULL, cmdline_base);
if (argc >= 7)
pos = simple_strtoul(argv[6], NULL, cmdline_base);
else
pos = 0;
time = get_timer(0);
len = fs_write(filename, addr, pos, bytes);
time = get_timer(time);
if (len <= 0)
return 1;
printf("%d bytes written in %lu ms", len, time);
if (time > 0) {
puts(" (");
print_size(len / time * 1000, "/s");
puts(")");
}
puts("\n");
return 0;
}