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u-boot/fs/fs.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

689 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
*/
#include <config.h>
#include <errno.h>
#include <common.h>
#include <mapmem.h>
#include <part.h>
#include <ext4fs.h>
#include <fat.h>
#include <fs.h>
#include <sandboxfs.h>
#include <ubifs_uboot.h>
#include <btrfs.h>
#include <asm/io.h>
#include <div64.h>
#include <linux/math64.h>
DECLARE_GLOBAL_DATA_PTR;
static struct blk_desc *fs_dev_desc;
static int fs_dev_part;
static disk_partition_t fs_partition;
static int fs_type = FS_TYPE_ANY;
static inline int fs_probe_unsupported(struct blk_desc *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;
}
/* generic implementation of ls in terms of opendir/readdir/closedir */
__maybe_unused
static int fs_ls_generic(const char *dirname)
{
struct fs_dir_stream *dirs;
struct fs_dirent *dent;
int nfiles = 0, ndirs = 0;
dirs = fs_opendir(dirname);
if (!dirs)
return -errno;
while ((dent = fs_readdir(dirs))) {
if (dent->type == FS_DT_DIR) {
printf(" %s/\n", dent->name);
ndirs++;
} else {
printf(" %8lld %s\n", dent->size, dent->name);
nfiles++;
}
}
fs_closedir(dirs);
printf("\n%d file(s), %d dir(s)\n\n", nfiles, ndirs);
return 0;
}
static inline int fs_exists_unsupported(const char *filename)
{
return 0;
}
static inline int fs_size_unsupported(const char *filename, loff_t *size)
{
return -1;
}
static inline int fs_read_unsupported(const char *filename, void *buf,
loff_t offset, loff_t len,
loff_t *actread)
{
return -1;
}
static inline int fs_write_unsupported(const char *filename, void *buf,
loff_t offset, loff_t len,
loff_t *actwrite)
{
return -1;
}
static inline void fs_close_unsupported(void)
{
}
static inline int fs_uuid_unsupported(char *uuid_str)
{
return -1;
}
static inline int fs_opendir_unsupported(const char *filename,
struct fs_dir_stream **dirs)
{
return -EACCES;
}
struct fstype_info {
int fstype;
char *name;
/*
* 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)(struct blk_desc *fs_dev_desc,
disk_partition_t *fs_partition);
int (*ls)(const char *dirname);
int (*exists)(const char *filename);
int (*size)(const char *filename, loff_t *size);
int (*read)(const char *filename, void *buf, loff_t offset,
loff_t len, loff_t *actread);
int (*write)(const char *filename, void *buf, loff_t offset,
loff_t len, loff_t *actwrite);
void (*close)(void);
int (*uuid)(char *uuid_str);
/*
* Open a directory stream. On success return 0 and directory
* stream pointer via 'dirsp'. On error, return -errno. See
* fs_opendir().
*/
int (*opendir)(const char *filename, struct fs_dir_stream **dirsp);
/*
* Read next entry from directory stream. On success return 0
* and directory entry pointer via 'dentp'. On error return
* -errno. See fs_readdir().
*/
int (*readdir)(struct fs_dir_stream *dirs, struct fs_dirent **dentp);
/* see fs_closedir() */
void (*closedir)(struct fs_dir_stream *dirs);
};
static struct fstype_info fstypes[] = {
#ifdef CONFIG_FS_FAT
{
.fstype = FS_TYPE_FAT,
.name = "fat",
.null_dev_desc_ok = false,
.probe = fat_set_blk_dev,
.close = fat_close,
.ls = fs_ls_generic,
.exists = fat_exists,
.size = fat_size,
.read = fat_read_file,
#ifdef CONFIG_FAT_WRITE
.write = file_fat_write,
#else
.write = fs_write_unsupported,
#endif
.uuid = fs_uuid_unsupported,
.opendir = fat_opendir,
.readdir = fat_readdir,
.closedir = fat_closedir,
},
#endif
#ifdef CONFIG_FS_EXT4
{
.fstype = FS_TYPE_EXT,
.name = "ext4",
.null_dev_desc_ok = false,
.probe = ext4fs_probe,
.close = ext4fs_close,
.ls = ext4fs_ls,
.exists = ext4fs_exists,
.size = ext4fs_size,
.read = ext4_read_file,
#ifdef CONFIG_CMD_EXT4_WRITE
.write = ext4_write_file,
#else
.write = fs_write_unsupported,
#endif
.uuid = ext4fs_uuid,
.opendir = fs_opendir_unsupported,
},
#endif
#ifdef CONFIG_SANDBOX
{
.fstype = FS_TYPE_SANDBOX,
.name = "sandbox",
.null_dev_desc_ok = true,
.probe = sandbox_fs_set_blk_dev,
.close = sandbox_fs_close,
.ls = sandbox_fs_ls,
.exists = sandbox_fs_exists,
.size = sandbox_fs_size,
.read = fs_read_sandbox,
.write = fs_write_sandbox,
.uuid = fs_uuid_unsupported,
.opendir = fs_opendir_unsupported,
},
#endif
#ifdef CONFIG_CMD_UBIFS
{
.fstype = FS_TYPE_UBIFS,
.name = "ubifs",
.null_dev_desc_ok = true,
.probe = ubifs_set_blk_dev,
.close = ubifs_close,
.ls = ubifs_ls,
.exists = ubifs_exists,
.size = ubifs_size,
.read = ubifs_read,
.write = fs_write_unsupported,
.uuid = fs_uuid_unsupported,
.opendir = fs_opendir_unsupported,
},
#endif
#ifdef CONFIG_FS_BTRFS
{
.fstype = FS_TYPE_BTRFS,
.name = "btrfs",
.null_dev_desc_ok = false,
.probe = btrfs_probe,
.close = btrfs_close,
.ls = btrfs_ls,
.exists = btrfs_exists,
.size = btrfs_size,
.read = btrfs_read,
.write = fs_write_unsupported,
.uuid = btrfs_uuid,
.opendir = fs_opendir_unsupported,
},
#endif
{
.fstype = FS_TYPE_ANY,
.name = "unsupported",
.null_dev_desc_ok = true,
.probe = fs_probe_unsupported,
.close = fs_close_unsupported,
.ls = fs_ls_unsupported,
.exists = fs_exists_unsupported,
.size = fs_size_unsupported,
.read = fs_read_unsupported,
.write = fs_write_unsupported,
.uuid = fs_uuid_unsupported,
.opendir = fs_opendir_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->name += gd->reloc_off;
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 = blk_get_device_part_str(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;
fs_dev_part = part;
return 0;
}
}
return -1;
}
/* set current blk device w/ blk_desc + partition # */
int fs_set_blk_dev_with_part(struct blk_desc *desc, int part)
{
struct fstype_info *info;
int ret, i;
if (part >= 1)
ret = part_get_info(desc, part, &fs_partition);
else
ret = part_get_info_whole_disk(desc, &fs_partition);
if (ret)
return ret;
fs_dev_desc = desc;
for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes); i++, info++) {
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_uuid(char *uuid_str)
{
struct fstype_info *info = fs_get_info(fs_type);
return info->uuid(uuid_str);
}
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_size(const char *filename, loff_t *size)
{
int ret;
struct fstype_info *info = fs_get_info(fs_type);
ret = info->size(filename, size);
fs_close();
return ret;
}
int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
loff_t *actread)
{
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, actread);
unmap_sysmem(buf);
/* If we requested a specific number of bytes, check we got it */
if (ret == 0 && len && *actread != len)
debug("** %s shorter than offset + len **\n", filename);
fs_close();
return ret;
}
int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
loff_t *actwrite)
{
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, actwrite);
unmap_sysmem(buf);
if (ret < 0 && len != *actwrite) {
printf("** Unable to write file %s **\n", filename);
ret = -1;
}
fs_close();
return ret;
}
struct fs_dir_stream *fs_opendir(const char *filename)
{
struct fstype_info *info = fs_get_info(fs_type);
struct fs_dir_stream *dirs = NULL;
int ret;
ret = info->opendir(filename, &dirs);
fs_close();
if (ret) {
errno = -ret;
return NULL;
}
dirs->desc = fs_dev_desc;
dirs->part = fs_dev_part;
return dirs;
}
struct fs_dirent *fs_readdir(struct fs_dir_stream *dirs)
{
struct fstype_info *info;
struct fs_dirent *dirent;
int ret;
fs_set_blk_dev_with_part(dirs->desc, dirs->part);
info = fs_get_info(fs_type);
ret = info->readdir(dirs, &dirent);
fs_close();
if (ret) {
errno = -ret;
return NULL;
}
return dirent;
}
void fs_closedir(struct fs_dir_stream *dirs)
{
struct fstype_info *info;
if (!dirs)
return;
fs_set_blk_dev_with_part(dirs->desc, dirs->part);
info = fs_get_info(fs_type);
info->closedir(dirs);
fs_close();
}
int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype)
{
loff_t size;
if (argc != 4)
return CMD_RET_USAGE;
if (fs_set_blk_dev(argv[1], argv[2], fstype))
return 1;
if (fs_size(argv[3], &size) < 0)
return CMD_RET_FAILURE;
env_set_hex("filesize", size);
return 0;
}
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;
loff_t bytes;
loff_t pos;
loff_t len_read;
int ret;
unsigned long time;
char *ep;
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], &ep, 16);
if (ep == argv[3] || *ep != '\0')
return CMD_RET_USAGE;
} else {
addr_str = env_get("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 = env_get("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);
ret = fs_read(filename, addr, pos, bytes, &len_read);
time = get_timer(time);
if (ret < 0)
return 1;
printf("%llu bytes read in %lu ms", len_read, time);
if (time > 0) {
puts(" (");
print_size(div_u64(len_read, time) * 1000, "/s");
puts(")");
}
puts("\n");
env_set_hex("fileaddr", addr);
env_set_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;
loff_t bytes;
loff_t pos;
loff_t len;
int ret;
unsigned long time;
if (argc < 6 || argc > 7)
return CMD_RET_USAGE;
if (fs_set_blk_dev(argv[1], argv[2], fstype))
return 1;
addr = simple_strtoul(argv[3], NULL, 16);
filename = argv[4];
bytes = simple_strtoul(argv[5], NULL, 16);
if (argc >= 7)
pos = simple_strtoul(argv[6], NULL, 16);
else
pos = 0;
time = get_timer(0);
ret = fs_write(filename, addr, pos, bytes, &len);
time = get_timer(time);
if (ret < 0)
return 1;
printf("%llu bytes written in %lu ms", len, time);
if (time > 0) {
puts(" (");
print_size(div_u64(len, time) * 1000, "/s");
puts(")");
}
puts("\n");
return 0;
}
int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype)
{
int ret;
char uuid[37];
memset(uuid, 0, sizeof(uuid));
if (argc < 3 || argc > 4)
return CMD_RET_USAGE;
if (fs_set_blk_dev(argv[1], argv[2], fstype))
return 1;
ret = fs_uuid(uuid);
if (ret)
return CMD_RET_FAILURE;
if (argc == 4)
env_set(argv[3], uuid);
else
printf("%s\n", uuid);
return CMD_RET_SUCCESS;
}
int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
struct fstype_info *info;
if (argc < 3 || argc > 4)
return CMD_RET_USAGE;
if (fs_set_blk_dev(argv[1], argv[2], FS_TYPE_ANY))
return 1;
info = fs_get_info(fs_type);
if (argc == 4)
env_set(argv[3], info->name);
else
printf("%s\n", info->name);
return CMD_RET_SUCCESS;
}
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