1803 lines
38 KiB
C
1803 lines
38 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2000-2010
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2008
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* Guennadi Liakhovetski, DENX Software Engineering, lg@denx.de.
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*/
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#define _GNU_SOURCE
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#include <compiler.h>
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#include <errno.h>
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#include <env_flags.h>
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#include <fcntl.h>
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#include <libgen.h>
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#include <linux/fs.h>
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#include <linux/stringify.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <dirent.h>
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#ifdef MTD_OLD
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# include <stdint.h>
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# include <linux/mtd/mtd.h>
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#else
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# define __user /* nothing */
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# include <mtd/mtd-user.h>
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#endif
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#include <mtd/ubi-user.h>
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#include "fw_env_private.h"
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#include "fw_env.h"
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struct env_opts default_opts = {
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#ifdef CONFIG_FILE
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.config_file = CONFIG_FILE
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#endif
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};
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#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
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#define min(x, y) ({ \
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typeof(x) _min1 = (x); \
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typeof(y) _min2 = (y); \
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(void) (&_min1 == &_min2); \
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_min1 < _min2 ? _min1 : _min2; })
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struct envdev_s {
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const char *devname; /* Device name */
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long long devoff; /* Device offset */
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ulong env_size; /* environment size */
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ulong erase_size; /* device erase size */
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ulong env_sectors; /* number of environment sectors */
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uint8_t mtd_type; /* type of the MTD device */
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int is_ubi; /* set if we use UBI volume */
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};
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static struct envdev_s envdevices[2] = {
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{
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.mtd_type = MTD_ABSENT,
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}, {
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.mtd_type = MTD_ABSENT,
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},
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};
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static int dev_current;
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#define DEVNAME(i) envdevices[(i)].devname
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#define DEVOFFSET(i) envdevices[(i)].devoff
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#define ENVSIZE(i) envdevices[(i)].env_size
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#define DEVESIZE(i) envdevices[(i)].erase_size
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#define ENVSECTORS(i) envdevices[(i)].env_sectors
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#define DEVTYPE(i) envdevices[(i)].mtd_type
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#define IS_UBI(i) envdevices[(i)].is_ubi
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#define CUR_ENVSIZE ENVSIZE(dev_current)
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static unsigned long usable_envsize;
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#define ENV_SIZE usable_envsize
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struct env_image_single {
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uint32_t crc; /* CRC32 over data bytes */
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char data[];
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};
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struct env_image_redundant {
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uint32_t crc; /* CRC32 over data bytes */
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unsigned char flags; /* active or obsolete */
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char data[];
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};
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enum flag_scheme {
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FLAG_NONE,
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FLAG_BOOLEAN,
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FLAG_INCREMENTAL,
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};
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struct environment {
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void *image;
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uint32_t *crc;
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unsigned char *flags;
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char *data;
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enum flag_scheme flag_scheme;
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};
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static struct environment environment = {
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.flag_scheme = FLAG_NONE,
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};
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static int have_redund_env;
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static unsigned char active_flag = 1;
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/* obsolete_flag must be 0 to efficiently set it on NOR flash without erasing */
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static unsigned char obsolete_flag = 0;
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#define DEFAULT_ENV_INSTANCE_STATIC
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#include <env_default.h>
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#define UBI_DEV_START "/dev/ubi"
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#define UBI_SYSFS "/sys/class/ubi"
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#define UBI_VOL_NAME_PATT "ubi%d_%d"
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static int is_ubi_devname(const char *devname)
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{
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return !strncmp(devname, UBI_DEV_START, sizeof(UBI_DEV_START) - 1);
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}
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static int ubi_check_volume_sysfs_name(const char *volume_sysfs_name,
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const char *volname)
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{
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char path[256];
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FILE *file;
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char *name;
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int ret;
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strcpy(path, UBI_SYSFS "/");
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strcat(path, volume_sysfs_name);
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strcat(path, "/name");
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file = fopen(path, "r");
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if (!file)
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return -1;
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ret = fscanf(file, "%ms", &name);
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fclose(file);
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if (ret <= 0 || !name) {
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fprintf(stderr,
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"Failed to read from file %s, ret = %d, name = %s\n",
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path, ret, name);
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return -1;
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}
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if (!strcmp(name, volname)) {
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free(name);
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return 0;
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}
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free(name);
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return -1;
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}
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static int ubi_get_volnum_by_name(int devnum, const char *volname)
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{
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DIR *sysfs_ubi;
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struct dirent *dirent;
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int ret;
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int tmp_devnum;
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int volnum;
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sysfs_ubi = opendir(UBI_SYSFS);
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if (!sysfs_ubi)
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return -1;
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#ifdef DEBUG
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fprintf(stderr, "Looking for volume name \"%s\"\n", volname);
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#endif
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while (1) {
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dirent = readdir(sysfs_ubi);
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if (!dirent)
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return -1;
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ret = sscanf(dirent->d_name, UBI_VOL_NAME_PATT,
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&tmp_devnum, &volnum);
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if (ret == 2 && devnum == tmp_devnum) {
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if (ubi_check_volume_sysfs_name(dirent->d_name,
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volname) == 0)
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return volnum;
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}
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}
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return -1;
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}
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static int ubi_get_devnum_by_devname(const char *devname)
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{
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int devnum;
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int ret;
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ret = sscanf(devname + sizeof(UBI_DEV_START) - 1, "%d", &devnum);
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if (ret != 1)
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return -1;
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return devnum;
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}
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static const char *ubi_get_volume_devname(const char *devname,
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const char *volname)
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{
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char *volume_devname;
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int volnum;
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int devnum;
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int ret;
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devnum = ubi_get_devnum_by_devname(devname);
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if (devnum < 0)
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return NULL;
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volnum = ubi_get_volnum_by_name(devnum, volname);
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if (volnum < 0)
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return NULL;
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ret = asprintf(&volume_devname, "%s_%d", devname, volnum);
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if (ret < 0)
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return NULL;
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#ifdef DEBUG
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fprintf(stderr, "Found ubi volume \"%s:%s\" -> %s\n",
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devname, volname, volume_devname);
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#endif
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return volume_devname;
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}
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static void ubi_check_dev(unsigned int dev_id)
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{
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char *devname = (char *)DEVNAME(dev_id);
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char *pname;
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const char *volname = NULL;
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const char *volume_devname;
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if (!is_ubi_devname(DEVNAME(dev_id)))
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return;
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IS_UBI(dev_id) = 1;
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for (pname = devname; *pname != '\0'; pname++) {
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if (*pname == ':') {
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*pname = '\0';
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volname = pname + 1;
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break;
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}
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}
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if (volname) {
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/* Let's find real volume device name */
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volume_devname = ubi_get_volume_devname(devname, volname);
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if (!volume_devname) {
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fprintf(stderr, "Didn't found ubi volume \"%s\"\n",
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volname);
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return;
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}
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free(devname);
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DEVNAME(dev_id) = volume_devname;
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}
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}
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static int ubi_update_start(int fd, int64_t bytes)
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{
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if (ioctl(fd, UBI_IOCVOLUP, &bytes))
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return -1;
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return 0;
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}
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static int ubi_read(int fd, void *buf, size_t count)
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{
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ssize_t ret;
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while (count > 0) {
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ret = read(fd, buf, count);
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if (ret > 0) {
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count -= ret;
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buf += ret;
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continue;
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}
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if (ret == 0) {
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/*
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* Happens in case of too short volume data size. If we
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* return error status we will fail it will be treated
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* as UBI device error.
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*
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* Leave catching this error to CRC check.
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*/
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fprintf(stderr, "Warning: end of data on ubi volume\n");
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return 0;
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} else if (errno == EBADF) {
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/*
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* Happens in case of corrupted volume. The same as
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* above, we cannot return error now, as we will still
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* be able to successfully write environment later.
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*/
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fprintf(stderr, "Warning: corrupted volume?\n");
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return 0;
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} else if (errno == EINTR) {
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continue;
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}
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fprintf(stderr, "Cannot read %u bytes from ubi volume, %s\n",
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(unsigned int)count, strerror(errno));
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return -1;
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}
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return 0;
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}
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static int ubi_write(int fd, const void *buf, size_t count)
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{
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ssize_t ret;
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while (count > 0) {
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ret = write(fd, buf, count);
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if (ret <= 0) {
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if (ret < 0 && errno == EINTR)
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continue;
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fprintf(stderr, "Cannot write %u bytes to ubi volume\n",
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(unsigned int)count);
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return -1;
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}
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count -= ret;
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buf += ret;
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}
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return 0;
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}
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static int flash_io(int mode);
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static int parse_config(struct env_opts *opts);
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#if defined(CONFIG_FILE)
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static int get_config(char *);
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#endif
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static char *skip_chars(char *s)
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{
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for (; *s != '\0'; s++) {
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if (isblank(*s) || *s == '=')
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return s;
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}
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return NULL;
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}
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static char *skip_blanks(char *s)
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{
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for (; *s != '\0'; s++) {
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if (!isblank(*s))
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return s;
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}
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return NULL;
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}
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/*
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* s1 is either a simple 'name', or a 'name=value' pair.
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* s2 is a 'name=value' pair.
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* If the names match, return the value of s2, else NULL.
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*/
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static char *envmatch(char *s1, char *s2)
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{
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if (s1 == NULL || s2 == NULL)
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return NULL;
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while (*s1 == *s2++)
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if (*s1++ == '=')
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return s2;
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if (*s1 == '\0' && *(s2 - 1) == '=')
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return s2;
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return NULL;
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}
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/**
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* Search the environment for a variable.
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* Return the value, if found, or NULL, if not found.
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*/
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char *fw_getenv(char *name)
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{
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char *env, *nxt;
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for (env = environment.data; *env; env = nxt + 1) {
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char *val;
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for (nxt = env; *nxt; ++nxt) {
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if (nxt >= &environment.data[ENV_SIZE]) {
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fprintf(stderr, "## Error: "
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"environment not terminated\n");
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return NULL;
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}
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}
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val = envmatch(name, env);
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if (!val)
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continue;
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return val;
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}
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return NULL;
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}
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/*
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* Search the default environment for a variable.
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* Return the value, if found, or NULL, if not found.
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*/
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char *fw_getdefenv(char *name)
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{
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char *env, *nxt;
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for (env = default_environment; *env; env = nxt + 1) {
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char *val;
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for (nxt = env; *nxt; ++nxt) {
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if (nxt >= &default_environment[ENV_SIZE]) {
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fprintf(stderr, "## Error: "
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"default environment not terminated\n");
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return NULL;
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}
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}
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val = envmatch(name, env);
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if (!val)
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continue;
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return val;
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}
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return NULL;
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}
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/*
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* Print the current definition of one, or more, or all
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* environment variables
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*/
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int fw_printenv(int argc, char *argv[], int value_only, struct env_opts *opts)
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{
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int i, rc = 0;
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if (value_only && argc != 1) {
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fprintf(stderr,
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"## Error: `-n'/`--noheader' option requires exactly one argument\n");
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return -1;
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}
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if (!opts)
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opts = &default_opts;
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if (fw_env_open(opts))
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return -1;
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if (argc == 0) { /* Print all env variables */
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char *env, *nxt;
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for (env = environment.data; *env; env = nxt + 1) {
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for (nxt = env; *nxt; ++nxt) {
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if (nxt >= &environment.data[ENV_SIZE]) {
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fprintf(stderr, "## Error: "
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"environment not terminated\n");
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return -1;
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}
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}
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printf("%s\n", env);
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}
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fw_env_close(opts);
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return 0;
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}
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for (i = 0; i < argc; ++i) { /* print a subset of env variables */
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char *name = argv[i];
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char *val = NULL;
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val = fw_getenv(name);
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if (!val) {
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fprintf(stderr, "## Error: \"%s\" not defined\n", name);
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rc = -1;
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continue;
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}
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if (value_only) {
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puts(val);
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break;
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}
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printf("%s=%s\n", name, val);
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}
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fw_env_close(opts);
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return rc;
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}
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int fw_env_flush(struct env_opts *opts)
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{
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if (!opts)
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opts = &default_opts;
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/*
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* Update CRC
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*/
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*environment.crc = crc32(0, (uint8_t *) environment.data, ENV_SIZE);
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/* write environment back to flash */
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if (flash_io(O_RDWR)) {
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fprintf(stderr, "Error: can't write fw_env to flash\n");
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return -1;
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}
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return 0;
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}
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/*
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* Set/Clear a single variable in the environment.
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* This is called in sequence to update the environment
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* in RAM without updating the copy in flash after each set
|
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*/
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int fw_env_write(char *name, char *value)
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{
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int len;
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char *env, *nxt;
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char *oldval = NULL;
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int deleting, creating, overwriting;
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/*
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* search if variable with this name already exists
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*/
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for (nxt = env = environment.data; *env; env = nxt + 1) {
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for (nxt = env; *nxt; ++nxt) {
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if (nxt >= &environment.data[ENV_SIZE]) {
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fprintf(stderr, "## Error: "
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"environment not terminated\n");
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errno = EINVAL;
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return -1;
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}
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}
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oldval = envmatch(name, env);
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if (oldval)
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break;
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}
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deleting = (oldval && !(value && strlen(value)));
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creating = (!oldval && (value && strlen(value)));
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overwriting = (oldval && (value && strlen(value)));
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/* check for permission */
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if (deleting) {
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if (env_flags_validate_varaccess(name,
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ENV_FLAGS_VARACCESS_PREVENT_DELETE)) {
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printf("Can't delete \"%s\"\n", name);
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errno = EROFS;
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return -1;
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}
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} else if (overwriting) {
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if (env_flags_validate_varaccess(name,
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ENV_FLAGS_VARACCESS_PREVENT_OVERWR)) {
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printf("Can't overwrite \"%s\"\n", name);
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errno = EROFS;
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return -1;
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} else if (env_flags_validate_varaccess(name,
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ENV_FLAGS_VARACCESS_PREVENT_NONDEF_OVERWR)) {
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const char *defval = fw_getdefenv(name);
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|
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if (defval == NULL)
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defval = "";
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if (strcmp(oldval, defval)
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!= 0) {
|
|
printf("Can't overwrite \"%s\"\n", name);
|
|
errno = EROFS;
|
|
return -1;
|
|
}
|
|
}
|
|
} else if (creating) {
|
|
if (env_flags_validate_varaccess(name,
|
|
ENV_FLAGS_VARACCESS_PREVENT_CREATE)) {
|
|
printf("Can't create \"%s\"\n", name);
|
|
errno = EROFS;
|
|
return -1;
|
|
}
|
|
} else
|
|
/* Nothing to do */
|
|
return 0;
|
|
|
|
if (deleting || overwriting) {
|
|
if (*++nxt == '\0') {
|
|
*env = '\0';
|
|
} else {
|
|
for (;;) {
|
|
*env = *nxt++;
|
|
if ((*env == '\0') && (*nxt == '\0'))
|
|
break;
|
|
++env;
|
|
}
|
|
}
|
|
*++env = '\0';
|
|
}
|
|
|
|
/* Delete only ? */
|
|
if (!value || !strlen(value))
|
|
return 0;
|
|
|
|
/*
|
|
* Append new definition at the end
|
|
*/
|
|
for (env = environment.data; *env || *(env + 1); ++env)
|
|
;
|
|
if (env > environment.data)
|
|
++env;
|
|
/*
|
|
* Overflow when:
|
|
* "name" + "=" + "val" +"\0\0" > CUR_ENVSIZE - (env-environment)
|
|
*/
|
|
len = strlen(name) + 2;
|
|
/* add '=' for first arg, ' ' for all others */
|
|
len += strlen(value) + 1;
|
|
|
|
if (len > (&environment.data[ENV_SIZE] - env)) {
|
|
fprintf(stderr,
|
|
"Error: environment overflow, \"%s\" deleted\n", name);
|
|
return -1;
|
|
}
|
|
|
|
while ((*env = *name++) != '\0')
|
|
env++;
|
|
*env = '=';
|
|
while ((*++env = *value++) != '\0')
|
|
;
|
|
|
|
/* end is marked with double '\0' */
|
|
*++env = '\0';
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Deletes or sets environment variables. Returns -1 and sets errno error codes:
|
|
* 0 - OK
|
|
* EINVAL - need at least 1 argument
|
|
* EROFS - certain variables ("ethaddr", "serial#") cannot be
|
|
* modified or deleted
|
|
*
|
|
*/
|
|
int fw_env_set(int argc, char *argv[], struct env_opts *opts)
|
|
{
|
|
int i;
|
|
size_t len;
|
|
char *name, **valv;
|
|
char *oldval;
|
|
char *value = NULL;
|
|
int valc;
|
|
int ret;
|
|
|
|
if (!opts)
|
|
opts = &default_opts;
|
|
|
|
if (argc < 1) {
|
|
fprintf(stderr, "## Error: variable name missing\n");
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
if (fw_env_open(opts)) {
|
|
fprintf(stderr, "Error: environment not initialized\n");
|
|
return -1;
|
|
}
|
|
|
|
name = argv[0];
|
|
valv = argv + 1;
|
|
valc = argc - 1;
|
|
|
|
if (env_flags_validate_env_set_params(name, valv, valc) < 0) {
|
|
fw_env_close(opts);
|
|
return -1;
|
|
}
|
|
|
|
len = 0;
|
|
for (i = 0; i < valc; ++i) {
|
|
char *val = valv[i];
|
|
size_t val_len = strlen(val);
|
|
|
|
if (value)
|
|
value[len - 1] = ' ';
|
|
oldval = value;
|
|
value = realloc(value, len + val_len + 1);
|
|
if (!value) {
|
|
fprintf(stderr,
|
|
"Cannot malloc %zu bytes: %s\n",
|
|
len, strerror(errno));
|
|
free(oldval);
|
|
return -1;
|
|
}
|
|
|
|
memcpy(value + len, val, val_len);
|
|
len += val_len;
|
|
value[len++] = '\0';
|
|
}
|
|
|
|
fw_env_write(name, value);
|
|
|
|
free(value);
|
|
|
|
ret = fw_env_flush(opts);
|
|
fw_env_close(opts);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Parse a file and configure the u-boot variables.
|
|
* The script file has a very simple format, as follows:
|
|
*
|
|
* Each line has a couple with name, value:
|
|
* <white spaces>variable_name<white spaces>variable_value
|
|
*
|
|
* Both variable_name and variable_value are interpreted as strings.
|
|
* Any character after <white spaces> and before ending \r\n is interpreted
|
|
* as variable's value (no comment allowed on these lines !)
|
|
*
|
|
* Comments are allowed if the first character in the line is #
|
|
*
|
|
* Returns -1 and sets errno error codes:
|
|
* 0 - OK
|
|
* -1 - Error
|
|
*/
|
|
int fw_parse_script(char *fname, struct env_opts *opts)
|
|
{
|
|
FILE *fp;
|
|
char *line = NULL;
|
|
size_t linesize = 0;
|
|
char *name;
|
|
char *val;
|
|
int lineno = 0;
|
|
int len;
|
|
int ret = 0;
|
|
|
|
if (!opts)
|
|
opts = &default_opts;
|
|
|
|
if (fw_env_open(opts)) {
|
|
fprintf(stderr, "Error: environment not initialized\n");
|
|
return -1;
|
|
}
|
|
|
|
if (strcmp(fname, "-") == 0)
|
|
fp = stdin;
|
|
else {
|
|
fp = fopen(fname, "r");
|
|
if (fp == NULL) {
|
|
fprintf(stderr, "I cannot open %s for reading\n",
|
|
fname);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
while ((len = getline(&line, &linesize, fp)) != -1) {
|
|
lineno++;
|
|
|
|
/*
|
|
* Read a whole line from the file. If the line is not
|
|
* terminated, reports an error and exit.
|
|
*/
|
|
if (line[len - 1] != '\n') {
|
|
fprintf(stderr,
|
|
"Line %d not correctly terminated\n",
|
|
lineno);
|
|
ret = -1;
|
|
break;
|
|
}
|
|
|
|
/* Drop ending line feed / carriage return */
|
|
line[--len] = '\0';
|
|
if (len && line[len - 1] == '\r')
|
|
line[--len] = '\0';
|
|
|
|
/* Skip comment or empty lines */
|
|
if (len == 0 || line[0] == '#')
|
|
continue;
|
|
|
|
/*
|
|
* Search for variable's name remove leading whitespaces
|
|
*/
|
|
name = skip_blanks(line);
|
|
if (!name)
|
|
continue;
|
|
|
|
/* The first white space is the end of variable name */
|
|
val = skip_chars(name);
|
|
len = strlen(name);
|
|
if (val) {
|
|
*val++ = '\0';
|
|
if ((val - name) < len)
|
|
val = skip_blanks(val);
|
|
else
|
|
val = NULL;
|
|
}
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "Setting %s : %s\n",
|
|
name, val ? val : " removed");
|
|
#endif
|
|
|
|
if (env_flags_validate_type(name, val) < 0) {
|
|
ret = -1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If there is an error setting a variable,
|
|
* try to save the environment and returns an error
|
|
*/
|
|
if (fw_env_write(name, val)) {
|
|
fprintf(stderr,
|
|
"fw_env_write returns with error : %s\n",
|
|
strerror(errno));
|
|
ret = -1;
|
|
break;
|
|
}
|
|
|
|
}
|
|
free(line);
|
|
|
|
/* Close file if not stdin */
|
|
if (strcmp(fname, "-") != 0)
|
|
fclose(fp);
|
|
|
|
ret |= fw_env_flush(opts);
|
|
|
|
fw_env_close(opts);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* environment_end() - compute offset of first byte right after environment
|
|
* @dev - index of enviroment buffer
|
|
* Return:
|
|
* device offset of first byte right after environment
|
|
*/
|
|
off_t environment_end(int dev)
|
|
{
|
|
/* environment is block aligned */
|
|
return DEVOFFSET(dev) + ENVSECTORS(dev) * DEVESIZE(dev);
|
|
}
|
|
|
|
/*
|
|
* Test for bad block on NAND, just returns 0 on NOR, on NAND:
|
|
* 0 - block is good
|
|
* > 0 - block is bad
|
|
* < 0 - failed to test
|
|
*/
|
|
static int flash_bad_block(int fd, uint8_t mtd_type, loff_t blockstart)
|
|
{
|
|
if (mtd_type == MTD_NANDFLASH) {
|
|
int badblock = ioctl(fd, MEMGETBADBLOCK, &blockstart);
|
|
|
|
if (badblock < 0) {
|
|
perror("Cannot read bad block mark");
|
|
return badblock;
|
|
}
|
|
|
|
if (badblock) {
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "Bad block at 0x%llx, skipping\n",
|
|
(unsigned long long)blockstart);
|
|
#endif
|
|
return badblock;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read data from flash at an offset into a provided buffer. On NAND it skips
|
|
* bad blocks but makes sure it stays within ENVSECTORS (dev) starting from
|
|
* the DEVOFFSET (dev) block. On NOR the loop is only run once.
|
|
*/
|
|
static int flash_read_buf(int dev, int fd, void *buf, size_t count,
|
|
off_t offset)
|
|
{
|
|
size_t blocklen; /* erase / write length - one block on NAND,
|
|
0 on NOR */
|
|
size_t processed = 0; /* progress counter */
|
|
size_t readlen = count; /* current read length */
|
|
off_t block_seek; /* offset inside the current block to the start
|
|
of the data */
|
|
loff_t blockstart; /* running start of the current block -
|
|
MEMGETBADBLOCK needs 64 bits */
|
|
int rc;
|
|
|
|
blockstart = (offset / DEVESIZE(dev)) * DEVESIZE(dev);
|
|
|
|
/* Offset inside a block */
|
|
block_seek = offset - blockstart;
|
|
|
|
if (DEVTYPE(dev) == MTD_NANDFLASH) {
|
|
/*
|
|
* NAND: calculate which blocks we are reading. We have
|
|
* to read one block at a time to skip bad blocks.
|
|
*/
|
|
blocklen = DEVESIZE(dev);
|
|
|
|
/* Limit to one block for the first read */
|
|
if (readlen > blocklen - block_seek)
|
|
readlen = blocklen - block_seek;
|
|
} else {
|
|
blocklen = 0;
|
|
}
|
|
|
|
/* This only runs once on NOR flash */
|
|
while (processed < count) {
|
|
rc = flash_bad_block(fd, DEVTYPE(dev), blockstart);
|
|
if (rc < 0) /* block test failed */
|
|
return -1;
|
|
|
|
if (blockstart + block_seek + readlen > environment_end(dev)) {
|
|
/* End of range is reached */
|
|
fprintf(stderr, "Too few good blocks within range\n");
|
|
return -1;
|
|
}
|
|
|
|
if (rc) { /* block is bad */
|
|
blockstart += blocklen;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* If a block is bad, we retry in the next block at the same
|
|
* offset - see env/nand.c::writeenv()
|
|
*/
|
|
lseek(fd, blockstart + block_seek, SEEK_SET);
|
|
|
|
rc = read(fd, buf + processed, readlen);
|
|
if (rc != readlen) {
|
|
fprintf(stderr, "Read error on %s: %s\n",
|
|
DEVNAME(dev), strerror(errno));
|
|
return -1;
|
|
}
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "Read 0x%x bytes at 0x%llx on %s\n",
|
|
rc, (unsigned long long)blockstart + block_seek,
|
|
DEVNAME(dev));
|
|
#endif
|
|
processed += readlen;
|
|
readlen = min(blocklen, count - processed);
|
|
block_seek = 0;
|
|
blockstart += blocklen;
|
|
}
|
|
|
|
return processed;
|
|
}
|
|
|
|
/*
|
|
* Write count bytes from begin of environment, but stay within
|
|
* ENVSECTORS(dev) sectors of
|
|
* DEVOFFSET (dev). Similar to the read case above, on NOR and dataflash we
|
|
* erase and write the whole data at once.
|
|
*/
|
|
static int flash_write_buf(int dev, int fd, void *buf, size_t count)
|
|
{
|
|
void *data;
|
|
struct erase_info_user erase;
|
|
size_t blocklen; /* length of NAND block / NOR erase sector */
|
|
size_t erase_len; /* whole area that can be erased - may include
|
|
bad blocks */
|
|
size_t erasesize; /* erase / write length - one block on NAND,
|
|
whole area on NOR */
|
|
size_t processed = 0; /* progress counter */
|
|
size_t write_total; /* total size to actually write - excluding
|
|
bad blocks */
|
|
off_t erase_offset; /* offset to the first erase block (aligned)
|
|
below offset */
|
|
off_t block_seek; /* offset inside the erase block to the start
|
|
of the data */
|
|
loff_t blockstart; /* running start of the current block -
|
|
MEMGETBADBLOCK needs 64 bits */
|
|
int rc;
|
|
|
|
/*
|
|
* For mtd devices only offset and size of the environment do matter
|
|
*/
|
|
if (DEVTYPE(dev) == MTD_ABSENT) {
|
|
blocklen = count;
|
|
erase_len = blocklen;
|
|
blockstart = DEVOFFSET(dev);
|
|
block_seek = 0;
|
|
write_total = blocklen;
|
|
} else {
|
|
blocklen = DEVESIZE(dev);
|
|
|
|
erase_offset = DEVOFFSET(dev);
|
|
|
|
/* Maximum area we may use */
|
|
erase_len = environment_end(dev) - erase_offset;
|
|
|
|
blockstart = erase_offset;
|
|
|
|
/* Offset inside a block */
|
|
block_seek = DEVOFFSET(dev) - erase_offset;
|
|
|
|
/*
|
|
* Data size we actually write: from the start of the block
|
|
* to the start of the data, then count bytes of data, and
|
|
* to the end of the block
|
|
*/
|
|
write_total = ((block_seek + count + blocklen - 1) /
|
|
blocklen) * blocklen;
|
|
}
|
|
|
|
/*
|
|
* Support data anywhere within erase sectors: read out the complete
|
|
* area to be erased, replace the environment image, write the whole
|
|
* block back again.
|
|
*/
|
|
if (write_total > count) {
|
|
data = malloc(erase_len);
|
|
if (!data) {
|
|
fprintf(stderr,
|
|
"Cannot malloc %zu bytes: %s\n",
|
|
erase_len, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
rc = flash_read_buf(dev, fd, data, write_total, erase_offset);
|
|
if (write_total != rc)
|
|
return -1;
|
|
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "Preserving data ");
|
|
if (block_seek != 0)
|
|
fprintf(stderr, "0x%x - 0x%lx", 0, block_seek - 1);
|
|
if (block_seek + count != write_total) {
|
|
if (block_seek != 0)
|
|
fprintf(stderr, " and ");
|
|
fprintf(stderr, "0x%lx - 0x%lx",
|
|
(unsigned long)block_seek + count,
|
|
(unsigned long)write_total - 1);
|
|
}
|
|
fprintf(stderr, "\n");
|
|
#endif
|
|
/* Overwrite the old environment */
|
|
memcpy(data + block_seek, buf, count);
|
|
} else {
|
|
/*
|
|
* We get here, iff offset is block-aligned and count is a
|
|
* multiple of blocklen - see write_total calculation above
|
|
*/
|
|
data = buf;
|
|
}
|
|
|
|
if (DEVTYPE(dev) == MTD_NANDFLASH) {
|
|
/*
|
|
* NAND: calculate which blocks we are writing. We have
|
|
* to write one block at a time to skip bad blocks.
|
|
*/
|
|
erasesize = blocklen;
|
|
} else {
|
|
erasesize = erase_len;
|
|
}
|
|
|
|
erase.length = erasesize;
|
|
|
|
/* This only runs once on NOR flash and SPI-dataflash */
|
|
while (processed < write_total) {
|
|
rc = flash_bad_block(fd, DEVTYPE(dev), blockstart);
|
|
if (rc < 0) /* block test failed */
|
|
return rc;
|
|
|
|
if (blockstart + erasesize > environment_end(dev)) {
|
|
fprintf(stderr, "End of range reached, aborting\n");
|
|
return -1;
|
|
}
|
|
|
|
if (rc) { /* block is bad */
|
|
blockstart += blocklen;
|
|
continue;
|
|
}
|
|
|
|
if (DEVTYPE(dev) != MTD_ABSENT) {
|
|
erase.start = blockstart;
|
|
ioctl(fd, MEMUNLOCK, &erase);
|
|
/* These do not need an explicit erase cycle */
|
|
if (DEVTYPE(dev) != MTD_DATAFLASH)
|
|
if (ioctl(fd, MEMERASE, &erase) != 0) {
|
|
fprintf(stderr,
|
|
"MTD erase error on %s: %s\n",
|
|
DEVNAME(dev), strerror(errno));
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (lseek(fd, blockstart, SEEK_SET) == -1) {
|
|
fprintf(stderr,
|
|
"Seek error on %s: %s\n",
|
|
DEVNAME(dev), strerror(errno));
|
|
return -1;
|
|
}
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "Write 0x%llx bytes at 0x%llx\n",
|
|
(unsigned long long)erasesize,
|
|
(unsigned long long)blockstart);
|
|
#endif
|
|
if (write(fd, data + processed, erasesize) != erasesize) {
|
|
fprintf(stderr, "Write error on %s: %s\n",
|
|
DEVNAME(dev), strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
if (DEVTYPE(dev) != MTD_ABSENT)
|
|
ioctl(fd, MEMLOCK, &erase);
|
|
|
|
processed += erasesize;
|
|
block_seek = 0;
|
|
blockstart += erasesize;
|
|
}
|
|
|
|
if (write_total > count)
|
|
free(data);
|
|
|
|
return processed;
|
|
}
|
|
|
|
/*
|
|
* Set obsolete flag at offset - NOR flash only
|
|
*/
|
|
static int flash_flag_obsolete(int dev, int fd, off_t offset)
|
|
{
|
|
int rc;
|
|
struct erase_info_user erase;
|
|
|
|
erase.start = DEVOFFSET(dev);
|
|
erase.length = DEVESIZE(dev);
|
|
/* This relies on the fact, that obsolete_flag == 0 */
|
|
rc = lseek(fd, offset, SEEK_SET);
|
|
if (rc < 0) {
|
|
fprintf(stderr, "Cannot seek to set the flag on %s\n",
|
|
DEVNAME(dev));
|
|
return rc;
|
|
}
|
|
ioctl(fd, MEMUNLOCK, &erase);
|
|
rc = write(fd, &obsolete_flag, sizeof(obsolete_flag));
|
|
ioctl(fd, MEMLOCK, &erase);
|
|
if (rc < 0)
|
|
perror("Could not set obsolete flag");
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int flash_write(int fd_current, int fd_target, int dev_target)
|
|
{
|
|
int rc;
|
|
|
|
switch (environment.flag_scheme) {
|
|
case FLAG_NONE:
|
|
break;
|
|
case FLAG_INCREMENTAL:
|
|
(*environment.flags)++;
|
|
break;
|
|
case FLAG_BOOLEAN:
|
|
*environment.flags = active_flag;
|
|
break;
|
|
default:
|
|
fprintf(stderr, "Unimplemented flash scheme %u\n",
|
|
environment.flag_scheme);
|
|
return -1;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "Writing new environment at 0x%llx on %s\n",
|
|
DEVOFFSET(dev_target), DEVNAME(dev_target));
|
|
#endif
|
|
|
|
if (IS_UBI(dev_target)) {
|
|
if (ubi_update_start(fd_target, CUR_ENVSIZE) < 0)
|
|
return 0;
|
|
return ubi_write(fd_target, environment.image, CUR_ENVSIZE);
|
|
}
|
|
|
|
rc = flash_write_buf(dev_target, fd_target, environment.image,
|
|
CUR_ENVSIZE);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
if (environment.flag_scheme == FLAG_BOOLEAN) {
|
|
/* Have to set obsolete flag */
|
|
off_t offset = DEVOFFSET(dev_current) +
|
|
offsetof(struct env_image_redundant, flags);
|
|
#ifdef DEBUG
|
|
fprintf(stderr,
|
|
"Setting obsolete flag in environment at 0x%llx on %s\n",
|
|
DEVOFFSET(dev_current), DEVNAME(dev_current));
|
|
#endif
|
|
flash_flag_obsolete(dev_current, fd_current, offset);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int flash_read(int fd)
|
|
{
|
|
int rc;
|
|
|
|
if (IS_UBI(dev_current)) {
|
|
DEVTYPE(dev_current) = MTD_ABSENT;
|
|
|
|
return ubi_read(fd, environment.image, CUR_ENVSIZE);
|
|
}
|
|
|
|
rc = flash_read_buf(dev_current, fd, environment.image, CUR_ENVSIZE,
|
|
DEVOFFSET(dev_current));
|
|
if (rc != CUR_ENVSIZE)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int flash_open_tempfile(const char **dname, const char **target_temp)
|
|
{
|
|
char *dup_name = strdup(DEVNAME(dev_current));
|
|
char *temp_name = NULL;
|
|
int rc = -1;
|
|
|
|
if (!dup_name)
|
|
return -1;
|
|
|
|
*dname = dirname(dup_name);
|
|
if (!*dname)
|
|
goto err;
|
|
|
|
rc = asprintf(&temp_name, "%s/XXXXXX", *dname);
|
|
if (rc == -1)
|
|
goto err;
|
|
|
|
rc = mkstemp(temp_name);
|
|
if (rc == -1) {
|
|
/* fall back to in place write */
|
|
fprintf(stderr,
|
|
"Can't create %s: %s\n", temp_name, strerror(errno));
|
|
free(temp_name);
|
|
} else {
|
|
*target_temp = temp_name;
|
|
/* deliberately leak dup_name as dname /might/ point into
|
|
* it and we need it for our caller
|
|
*/
|
|
dup_name = NULL;
|
|
}
|
|
|
|
err:
|
|
if (dup_name)
|
|
free(dup_name);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int flash_io_write(int fd_current)
|
|
{
|
|
int fd_target = -1, rc, dev_target;
|
|
const char *dname, *target_temp = NULL;
|
|
|
|
if (have_redund_env) {
|
|
/* switch to next partition for writing */
|
|
dev_target = !dev_current;
|
|
/* dev_target: fd_target, erase_target */
|
|
fd_target = open(DEVNAME(dev_target), O_RDWR);
|
|
if (fd_target < 0) {
|
|
fprintf(stderr,
|
|
"Can't open %s: %s\n",
|
|
DEVNAME(dev_target), strerror(errno));
|
|
rc = -1;
|
|
goto exit;
|
|
}
|
|
} else {
|
|
struct stat sb;
|
|
|
|
if (fstat(fd_current, &sb) == 0 && S_ISREG(sb.st_mode)) {
|
|
/* if any part of flash_open_tempfile() fails we fall
|
|
* back to in-place writes
|
|
*/
|
|
fd_target = flash_open_tempfile(&dname, &target_temp);
|
|
}
|
|
dev_target = dev_current;
|
|
if (fd_target == -1)
|
|
fd_target = fd_current;
|
|
}
|
|
|
|
rc = flash_write(fd_current, fd_target, dev_target);
|
|
|
|
if (fsync(fd_current) && !(errno == EINVAL || errno == EROFS)) {
|
|
fprintf(stderr,
|
|
"fsync failed on %s: %s\n",
|
|
DEVNAME(dev_current), strerror(errno));
|
|
}
|
|
|
|
if (fd_current != fd_target) {
|
|
if (fsync(fd_target) &&
|
|
!(errno == EINVAL || errno == EROFS)) {
|
|
fprintf(stderr,
|
|
"fsync failed on %s: %s\n",
|
|
DEVNAME(dev_current), strerror(errno));
|
|
}
|
|
|
|
if (close(fd_target)) {
|
|
fprintf(stderr,
|
|
"I/O error on %s: %s\n",
|
|
DEVNAME(dev_target), strerror(errno));
|
|
rc = -1;
|
|
}
|
|
|
|
if (target_temp) {
|
|
int dir_fd;
|
|
|
|
dir_fd = open(dname, O_DIRECTORY | O_RDONLY);
|
|
if (dir_fd == -1)
|
|
fprintf(stderr,
|
|
"Can't open %s: %s\n",
|
|
dname, strerror(errno));
|
|
|
|
if (rename(target_temp, DEVNAME(dev_target))) {
|
|
fprintf(stderr,
|
|
"rename failed %s => %s: %s\n",
|
|
target_temp, DEVNAME(dev_target),
|
|
strerror(errno));
|
|
rc = -1;
|
|
}
|
|
|
|
if (dir_fd != -1 && fsync(dir_fd))
|
|
fprintf(stderr,
|
|
"fsync failed on %s: %s\n",
|
|
dname, strerror(errno));
|
|
|
|
if (dir_fd != -1 && close(dir_fd))
|
|
fprintf(stderr,
|
|
"I/O error on %s: %s\n",
|
|
dname, strerror(errno));
|
|
}
|
|
}
|
|
exit:
|
|
return rc;
|
|
}
|
|
|
|
static int flash_io(int mode)
|
|
{
|
|
int fd_current, rc;
|
|
|
|
/* dev_current: fd_current, erase_current */
|
|
fd_current = open(DEVNAME(dev_current), mode);
|
|
if (fd_current < 0) {
|
|
fprintf(stderr,
|
|
"Can't open %s: %s\n",
|
|
DEVNAME(dev_current), strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
if (mode == O_RDWR) {
|
|
rc = flash_io_write(fd_current);
|
|
} else {
|
|
rc = flash_read(fd_current);
|
|
}
|
|
|
|
if (close(fd_current)) {
|
|
fprintf(stderr,
|
|
"I/O error on %s: %s\n",
|
|
DEVNAME(dev_current), strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Prevent confusion if running from erased flash memory
|
|
*/
|
|
int fw_env_open(struct env_opts *opts)
|
|
{
|
|
int crc0, crc0_ok;
|
|
unsigned char flag0;
|
|
void *addr0 = NULL;
|
|
|
|
int crc1, crc1_ok;
|
|
unsigned char flag1;
|
|
void *addr1 = NULL;
|
|
|
|
int ret;
|
|
|
|
struct env_image_single *single;
|
|
struct env_image_redundant *redundant;
|
|
|
|
if (!opts)
|
|
opts = &default_opts;
|
|
|
|
if (parse_config(opts)) /* should fill envdevices */
|
|
return -EINVAL;
|
|
|
|
addr0 = calloc(1, CUR_ENVSIZE);
|
|
if (addr0 == NULL) {
|
|
fprintf(stderr,
|
|
"Not enough memory for environment (%ld bytes)\n",
|
|
CUR_ENVSIZE);
|
|
ret = -ENOMEM;
|
|
goto open_cleanup;
|
|
}
|
|
|
|
/* read environment from FLASH to local buffer */
|
|
environment.image = addr0;
|
|
|
|
if (have_redund_env) {
|
|
redundant = addr0;
|
|
environment.crc = &redundant->crc;
|
|
environment.flags = &redundant->flags;
|
|
environment.data = redundant->data;
|
|
} else {
|
|
single = addr0;
|
|
environment.crc = &single->crc;
|
|
environment.flags = NULL;
|
|
environment.data = single->data;
|
|
}
|
|
|
|
dev_current = 0;
|
|
if (flash_io(O_RDONLY)) {
|
|
ret = -EIO;
|
|
goto open_cleanup;
|
|
}
|
|
|
|
crc0 = crc32(0, (uint8_t *)environment.data, ENV_SIZE);
|
|
|
|
crc0_ok = (crc0 == *environment.crc);
|
|
if (!have_redund_env) {
|
|
if (!crc0_ok) {
|
|
fprintf(stderr,
|
|
"Warning: Bad CRC, using default environment\n");
|
|
memcpy(environment.data, default_environment,
|
|
sizeof(default_environment));
|
|
}
|
|
} else {
|
|
flag0 = *environment.flags;
|
|
|
|
dev_current = 1;
|
|
addr1 = calloc(1, CUR_ENVSIZE);
|
|
if (addr1 == NULL) {
|
|
fprintf(stderr,
|
|
"Not enough memory for environment (%ld bytes)\n",
|
|
CUR_ENVSIZE);
|
|
ret = -ENOMEM;
|
|
goto open_cleanup;
|
|
}
|
|
redundant = addr1;
|
|
|
|
/*
|
|
* have to set environment.image for flash_read(), careful -
|
|
* other pointers in environment still point inside addr0
|
|
*/
|
|
environment.image = addr1;
|
|
if (flash_io(O_RDONLY)) {
|
|
ret = -EIO;
|
|
goto open_cleanup;
|
|
}
|
|
|
|
/* Check flag scheme compatibility */
|
|
if (DEVTYPE(dev_current) == MTD_NORFLASH &&
|
|
DEVTYPE(!dev_current) == MTD_NORFLASH) {
|
|
environment.flag_scheme = FLAG_BOOLEAN;
|
|
} else if (DEVTYPE(dev_current) == MTD_NANDFLASH &&
|
|
DEVTYPE(!dev_current) == MTD_NANDFLASH) {
|
|
environment.flag_scheme = FLAG_INCREMENTAL;
|
|
} else if (DEVTYPE(dev_current) == MTD_DATAFLASH &&
|
|
DEVTYPE(!dev_current) == MTD_DATAFLASH) {
|
|
environment.flag_scheme = FLAG_BOOLEAN;
|
|
} else if (DEVTYPE(dev_current) == MTD_UBIVOLUME &&
|
|
DEVTYPE(!dev_current) == MTD_UBIVOLUME) {
|
|
environment.flag_scheme = FLAG_INCREMENTAL;
|
|
} else if (DEVTYPE(dev_current) == MTD_ABSENT &&
|
|
DEVTYPE(!dev_current) == MTD_ABSENT &&
|
|
IS_UBI(dev_current) == IS_UBI(!dev_current)) {
|
|
environment.flag_scheme = FLAG_INCREMENTAL;
|
|
} else {
|
|
fprintf(stderr, "Incompatible flash types!\n");
|
|
ret = -EINVAL;
|
|
goto open_cleanup;
|
|
}
|
|
|
|
crc1 = crc32(0, (uint8_t *)redundant->data, ENV_SIZE);
|
|
|
|
crc1_ok = (crc1 == redundant->crc);
|
|
flag1 = redundant->flags;
|
|
|
|
if (crc0_ok && !crc1_ok) {
|
|
dev_current = 0;
|
|
} else if (!crc0_ok && crc1_ok) {
|
|
dev_current = 1;
|
|
} else if (!crc0_ok && !crc1_ok) {
|
|
fprintf(stderr,
|
|
"Warning: Bad CRC, using default environment\n");
|
|
memcpy(environment.data, default_environment,
|
|
sizeof(default_environment));
|
|
dev_current = 0;
|
|
} else {
|
|
switch (environment.flag_scheme) {
|
|
case FLAG_BOOLEAN:
|
|
if (flag0 == active_flag &&
|
|
flag1 == obsolete_flag) {
|
|
dev_current = 0;
|
|
} else if (flag0 == obsolete_flag &&
|
|
flag1 == active_flag) {
|
|
dev_current = 1;
|
|
} else if (flag0 == flag1) {
|
|
dev_current = 0;
|
|
} else if (flag0 == 0xFF) {
|
|
dev_current = 0;
|
|
} else if (flag1 == 0xFF) {
|
|
dev_current = 1;
|
|
} else {
|
|
dev_current = 0;
|
|
}
|
|
break;
|
|
case FLAG_INCREMENTAL:
|
|
if (flag0 == 255 && flag1 == 0)
|
|
dev_current = 1;
|
|
else if ((flag1 == 255 && flag0 == 0) ||
|
|
flag0 >= flag1)
|
|
dev_current = 0;
|
|
else /* flag1 > flag0 */
|
|
dev_current = 1;
|
|
break;
|
|
default:
|
|
fprintf(stderr, "Unknown flag scheme %u\n",
|
|
environment.flag_scheme);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we are reading, we don't need the flag and the CRC any
|
|
* more, if we are writing, we will re-calculate CRC and update
|
|
* flags before writing out
|
|
*/
|
|
if (dev_current) {
|
|
environment.image = addr1;
|
|
environment.crc = &redundant->crc;
|
|
environment.flags = &redundant->flags;
|
|
environment.data = redundant->data;
|
|
free(addr0);
|
|
} else {
|
|
environment.image = addr0;
|
|
/* Other pointers are already set */
|
|
free(addr1);
|
|
}
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "Selected env in %s\n", DEVNAME(dev_current));
|
|
#endif
|
|
}
|
|
return 0;
|
|
|
|
open_cleanup:
|
|
if (addr0)
|
|
free(addr0);
|
|
|
|
if (addr1)
|
|
free(addr0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Simply free allocated buffer with environment
|
|
*/
|
|
int fw_env_close(struct env_opts *opts)
|
|
{
|
|
if (environment.image)
|
|
free(environment.image);
|
|
|
|
environment.image = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int check_device_config(int dev)
|
|
{
|
|
struct stat st;
|
|
int32_t lnum = 0;
|
|
int fd, rc = 0;
|
|
|
|
/* Fills in IS_UBI(), converts DEVNAME() with ubi volume name */
|
|
ubi_check_dev(dev);
|
|
|
|
fd = open(DEVNAME(dev), O_RDONLY);
|
|
if (fd < 0) {
|
|
fprintf(stderr,
|
|
"Cannot open %s: %s\n", DEVNAME(dev), strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
rc = fstat(fd, &st);
|
|
if (rc < 0) {
|
|
fprintf(stderr, "Cannot stat the file %s\n", DEVNAME(dev));
|
|
goto err;
|
|
}
|
|
|
|
if (IS_UBI(dev)) {
|
|
rc = ioctl(fd, UBI_IOCEBISMAP, &lnum);
|
|
if (rc < 0) {
|
|
fprintf(stderr, "Cannot get UBI information for %s\n",
|
|
DEVNAME(dev));
|
|
goto err;
|
|
}
|
|
} else if (S_ISCHR(st.st_mode)) {
|
|
struct mtd_info_user mtdinfo;
|
|
rc = ioctl(fd, MEMGETINFO, &mtdinfo);
|
|
if (rc < 0) {
|
|
fprintf(stderr, "Cannot get MTD information for %s\n",
|
|
DEVNAME(dev));
|
|
goto err;
|
|
}
|
|
if (mtdinfo.type != MTD_NORFLASH &&
|
|
mtdinfo.type != MTD_NANDFLASH &&
|
|
mtdinfo.type != MTD_DATAFLASH &&
|
|
mtdinfo.type != MTD_UBIVOLUME) {
|
|
fprintf(stderr, "Unsupported flash type %u on %s\n",
|
|
mtdinfo.type, DEVNAME(dev));
|
|
goto err;
|
|
}
|
|
DEVTYPE(dev) = mtdinfo.type;
|
|
if (DEVESIZE(dev) == 0)
|
|
/* Assume the erase size is the same as the env-size */
|
|
DEVESIZE(dev) = ENVSIZE(dev);
|
|
} else {
|
|
uint64_t size;
|
|
DEVTYPE(dev) = MTD_ABSENT;
|
|
if (DEVESIZE(dev) == 0)
|
|
/* Assume the erase size to be 512 bytes */
|
|
DEVESIZE(dev) = 0x200;
|
|
|
|
/*
|
|
* Check for negative offsets, treat it as backwards offset
|
|
* from the end of the block device
|
|
*/
|
|
if (DEVOFFSET(dev) < 0) {
|
|
rc = ioctl(fd, BLKGETSIZE64, &size);
|
|
if (rc < 0) {
|
|
fprintf(stderr,
|
|
"Could not get block device size on %s\n",
|
|
DEVNAME(dev));
|
|
goto err;
|
|
}
|
|
|
|
DEVOFFSET(dev) = DEVOFFSET(dev) + size;
|
|
#ifdef DEBUG
|
|
fprintf(stderr,
|
|
"Calculated device offset 0x%llx on %s\n",
|
|
DEVOFFSET(dev), DEVNAME(dev));
|
|
#endif
|
|
}
|
|
}
|
|
|
|
if (ENVSECTORS(dev) == 0)
|
|
/* Assume enough sectors to cover the environment */
|
|
ENVSECTORS(dev) = DIV_ROUND_UP(ENVSIZE(dev), DEVESIZE(dev));
|
|
|
|
if (DEVOFFSET(dev) % DEVESIZE(dev) != 0) {
|
|
fprintf(stderr,
|
|
"Environment does not start on (erase) block boundary\n");
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
if (ENVSIZE(dev) > ENVSECTORS(dev) * DEVESIZE(dev)) {
|
|
fprintf(stderr,
|
|
"Environment does not fit into available sectors\n");
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
err:
|
|
close(fd);
|
|
return rc;
|
|
}
|
|
|
|
static int parse_config(struct env_opts *opts)
|
|
{
|
|
int rc;
|
|
|
|
if (!opts)
|
|
opts = &default_opts;
|
|
|
|
#if defined(CONFIG_FILE)
|
|
/* Fills in DEVNAME(), ENVSIZE(), DEVESIZE(). Or don't. */
|
|
if (get_config(opts->config_file)) {
|
|
fprintf(stderr, "Cannot parse config file '%s': %m\n",
|
|
opts->config_file);
|
|
return -1;
|
|
}
|
|
#else
|
|
DEVNAME(0) = DEVICE1_NAME;
|
|
DEVOFFSET(0) = DEVICE1_OFFSET;
|
|
ENVSIZE(0) = ENV1_SIZE;
|
|
|
|
/* Set defaults for DEVESIZE, ENVSECTORS later once we
|
|
* know DEVTYPE
|
|
*/
|
|
#ifdef DEVICE1_ESIZE
|
|
DEVESIZE(0) = DEVICE1_ESIZE;
|
|
#endif
|
|
#ifdef DEVICE1_ENVSECTORS
|
|
ENVSECTORS(0) = DEVICE1_ENVSECTORS;
|
|
#endif
|
|
|
|
#ifdef HAVE_REDUND
|
|
DEVNAME(1) = DEVICE2_NAME;
|
|
DEVOFFSET(1) = DEVICE2_OFFSET;
|
|
ENVSIZE(1) = ENV2_SIZE;
|
|
|
|
/* Set defaults for DEVESIZE, ENVSECTORS later once we
|
|
* know DEVTYPE
|
|
*/
|
|
#ifdef DEVICE2_ESIZE
|
|
DEVESIZE(1) = DEVICE2_ESIZE;
|
|
#endif
|
|
#ifdef DEVICE2_ENVSECTORS
|
|
ENVSECTORS(1) = DEVICE2_ENVSECTORS;
|
|
#endif
|
|
have_redund_env = 1;
|
|
#endif
|
|
#endif
|
|
rc = check_device_config(0);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
if (have_redund_env) {
|
|
rc = check_device_config(1);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
if (ENVSIZE(0) != ENVSIZE(1)) {
|
|
fprintf(stderr,
|
|
"Redundant environments have unequal size");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
usable_envsize = CUR_ENVSIZE - sizeof(uint32_t);
|
|
if (have_redund_env)
|
|
usable_envsize -= sizeof(char);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_FILE)
|
|
static int get_config(char *fname)
|
|
{
|
|
FILE *fp;
|
|
int i = 0;
|
|
int rc;
|
|
char *line = NULL;
|
|
size_t linesize = 0;
|
|
char *devname;
|
|
|
|
fp = fopen(fname, "r");
|
|
if (fp == NULL)
|
|
return -1;
|
|
|
|
while (i < 2 && getline(&line, &linesize, fp) != -1) {
|
|
/* Skip comment strings */
|
|
if (line[0] == '#')
|
|
continue;
|
|
|
|
rc = sscanf(line, "%ms %lli %lx %lx %lx",
|
|
&devname,
|
|
&DEVOFFSET(i),
|
|
&ENVSIZE(i), &DEVESIZE(i), &ENVSECTORS(i));
|
|
|
|
if (rc < 3)
|
|
continue;
|
|
|
|
DEVNAME(i) = devname;
|
|
|
|
/* Set defaults for DEVESIZE, ENVSECTORS later once we
|
|
* know DEVTYPE
|
|
*/
|
|
|
|
i++;
|
|
}
|
|
free(line);
|
|
fclose(fp);
|
|
|
|
have_redund_env = i - 1;
|
|
if (!i) { /* No valid entries found */
|
|
errno = EINVAL;
|
|
return -1;
|
|
} else
|
|
return 0;
|
|
}
|
|
#endif
|