u-boot/fs/fs.c

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/*
* 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_exists_unsupported(const char *filename)
{
return 0;
}
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;
/*
* Is it legal to pass NULL as .probe()'s fs_dev_desc parameter? This
* should be false in most cases. For "virtual" filesystems which
* aren't based on a U-Boot block device (e.g. sandbox), this can be
* set to true. This should also be true for the dumm entry at the end
* of fstypes[], since that is essentially a "virtual" (non-existent)
* filesystem.
*/
bool null_dev_desc_ok;
int (*probe)(block_dev_desc_t *fs_dev_desc,
disk_partition_t *fs_partition);
int (*ls)(const char *dirname);
int (*exists)(const char *filename);
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,
.null_dev_desc_ok = false,
.probe = fat_set_blk_dev,
.close = fat_close,
.ls = file_fat_ls,
.exists = fat_exists,
.read = fat_read_file,
.write = fs_write_unsupported,
},
#endif
#ifdef CONFIG_FS_EXT4
{
.fstype = FS_TYPE_EXT,
.null_dev_desc_ok = false,
.probe = ext4fs_probe,
.close = ext4fs_close,
.ls = ext4fs_ls,
.exists = ext4fs_exists,
.read = ext4_read_file,
.write = fs_write_unsupported,
},
#endif
#ifdef CONFIG_SANDBOX
{
.fstype = FS_TYPE_SANDBOX,
.null_dev_desc_ok = true,
.probe = sandbox_fs_set_blk_dev,
.close = sandbox_fs_close,
.ls = sandbox_fs_ls,
.exists = sandbox_fs_exists,
.read = fs_read_sandbox,
.write = fs_write_sandbox,
},
#endif
{
.fstype = FS_TYPE_ANY,
.null_dev_desc_ok = true,
.probe = fs_probe_unsupported,
.close = fs_close_unsupported,
.ls = fs_ls_unsupported,
.exists = fs_exists_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 (!fs_dev_desc && !info->null_dev_desc_ok)
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_exists(const char *filename)
{
int ret;
struct fstype_info *info = fs_get_info(fs_type);
ret = info->exists(filename);
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;
buf = map_sysmem(addr, len);
ret = info->write(filename, buf, offset, len);
unmap_sysmem(buf);
if (ret >= 0 && 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)
{
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, 16);
} 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, 16);
else
bytes = 0;
if (argc >= 7)
pos = simple_strtoul(argv[6], NULL, 16);
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 file_exists(const char *dev_type, const char *dev_part, const char *file,
int fstype)
{
if (fs_set_blk_dev(dev_type, dev_part, fstype))
return 0;
return fs_exists(file);
}
int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype)
{
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, 16);
bytes = simple_strtoul(argv[5], NULL, 16);
if (argc >= 7)
pos = simple_strtoul(argv[6], NULL, 16);
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;
}