-/*
- * Copyright (c) International Business Machines Corp., 2006
- * Copyright (C) 2009 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that 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, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Author: Artem Bityutskiy
- *
- * MTD library.
- */
-
-/* Imported from mtd-utils by dehrenberg */
-
-#include <limits.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <errno.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <inttypes.h>
-
-#include <mtd/mtd-user.h>
-#include "libmtd.h"
-
-#include "libmtd_int.h"
-#include "libmtd_common.h"
-
-/**
- * mkpath - compose full path from 2 given components.
- * @path: the first component
- * @name: the second component
- *
- * This function returns the resulting path in case of success and %NULL in
- * case of failure.
- */
-static char *mkpath(const char *path, const char *name)
-{
- char *n;
- size_t len1 = strlen(path);
- size_t len2 = strlen(name);
-
- n = xmalloc(len1 + len2 + 6);
-
- memcpy(n, path, len1);
- if (n[len1 - 1] != '/')
- n[len1++] = '/';
-
- memcpy(n + len1, name, len2 + 1);
- return n;
-}
-
-/**
- * read_data - read data from a file.
- * @file: the file to read from
- * @buf: the buffer to read to
- * @buf_len: buffer length
- *
- * This function returns number of read bytes in case of success and %-1 in
- * case of failure. Note, if the file contains more then @buf_len bytes of
- * date, this function fails with %EINVAL error code.
- */
-static int read_data(const char *file, void *buf, int buf_len)
-{
- int fd, rd, tmp, tmp1;
-
- fd = open(file, O_RDONLY | O_CLOEXEC);
- if (fd == -1)
- return -1;
-
- rd = read(fd, buf, buf_len);
- if (rd == -1) {
- sys_errmsg("cannot read \"%s\"", file);
- goto out_error;
- }
-
- if (rd == buf_len) {
- errmsg("contents of \"%s\" is too long", file);
- errno = EINVAL;
- goto out_error;
- }
-
- ((char *)buf)[rd] = '\0';
-
- /* Make sure all data is read */
- tmp1 = read(fd, &tmp, 1);
- if (tmp1 == 1) {
- sys_errmsg("cannot read \"%s\"", file);
- goto out_error;
- }
- if (tmp1) {
- errmsg("file \"%s\" contains too much data (> %d bytes)",
- file, buf_len);
- errno = EINVAL;
- goto out_error;
- }
-
- if (close(fd)) {
- sys_errmsg("close failed on \"%s\"", file);
- return -1;
- }
-
- return rd;
-
-out_error:
- close(fd);
- return -1;
-}
-
-/**
- * read_major - read major and minor numbers from a file.
- * @file: name of the file to read from
- * @major: major number is returned here
- * @minor: minor number is returned here
- *
- * This function returns % in case of success, and %-1 in case of failure.
- */
-static int read_major(const char *file, int *major, int *minor)
-{
- int ret;
- char buf[50];
-
- ret = read_data(file, buf, 50);
- if (ret < 0)
- return ret;
-
- ret = sscanf(buf, "%d:%d\n", major, minor);
- if (ret != 2) {
- errno = EINVAL;
- return errmsg("\"%s\" does not have major:minor format", file);
- }
-
- if (*major < 0 || *minor < 0) {
- errno = EINVAL;
- return errmsg("bad major:minor %d:%d in \"%s\"",
- *major, *minor, file);
- }
-
- return 0;
-}
-
-/**
- * dev_get_major - get major and minor numbers of an MTD device.
- * @lib: libmtd descriptor
- * @mtd_num: MTD device number
- * @major: major number is returned here
- * @minor: minor number is returned here
- *
- * This function returns zero in case of success and %-1 in case of failure.
- */
-static int dev_get_major(struct libmtd *lib, int mtd_num, int *major, int *minor)
-{
- char file[strlen(lib->mtd_dev) + 50];
-
- sprintf(file, lib->mtd_dev, mtd_num);
- return read_major(file, major, minor);
-}
-
-/**
- * dev_read_data - read data from an MTD device's sysfs file.
- * @patt: file pattern to read from
- * @mtd_num: MTD device number
- * @buf: buffer to read to
- * @buf_len: buffer length
- *
- * This function returns number of read bytes in case of success and %-1 in
- * case of failure.
- */
-static int dev_read_data(const char *patt, int mtd_num, void *buf, int buf_len)
-{
- char file[strlen(patt) + 100];
-
- sprintf(file, patt, mtd_num);
- return read_data(file, buf, buf_len);
-}
-
-/**
- * read_hex_ll - read a hex 'long long' value from a file.
- * @file: the file to read from
- * @value: the result is stored here
- *
- * This function reads file @file and interprets its contents as hexadecimal
- * 'long long' integer. If this is not true, it fails with %EINVAL error code.
- * Returns %0 in case of success and %-1 in case of failure.
- */
-static int read_hex_ll(const char *file, long long *value)
-{
- int fd, rd;
- char buf[50];
-
- fd = open(file, O_RDONLY | O_CLOEXEC);
- if (fd == -1)
- return -1;
-
- rd = read(fd, buf, sizeof(buf));
- if (rd == -1) {
- sys_errmsg("cannot read \"%s\"", file);
- goto out_error;
- }
- if (rd == sizeof(buf)) {
- errmsg("contents of \"%s\" is too long", file);
- errno = EINVAL;
- goto out_error;
- }
- buf[rd] = '\0';
-
- if (sscanf(buf, "%llx\n", value) != 1) {
- errmsg("cannot read integer from \"%s\"\n", file);
- errno = EINVAL;
- goto out_error;
- }
-
- if (*value < 0) {
- errmsg("negative value %lld in \"%s\"", *value, file);
- errno = EINVAL;
- goto out_error;
- }
-
- if (close(fd))
- return sys_errmsg("close failed on \"%s\"", file);
-
- return 0;
-
-out_error:
- close(fd);
- return -1;
-}
-
-/**
- * read_pos_ll - read a positive 'long long' value from a file.
- * @file: the file to read from
- * @value: the result is stored here
- *
- * This function reads file @file and interprets its contents as a positive
- * 'long long' integer. If this is not true, it fails with %EINVAL error code.
- * Returns %0 in case of success and %-1 in case of failure.
- */
-static int read_pos_ll(const char *file, long long *value)
-{
- int fd, rd;
- char buf[50];
-
- fd = open(file, O_RDONLY | O_CLOEXEC);
- if (fd == -1)
- return -1;
-
- rd = read(fd, buf, 50);
- if (rd == -1) {
- sys_errmsg("cannot read \"%s\"", file);
- goto out_error;
- }
- if (rd == 50) {
- errmsg("contents of \"%s\" is too long", file);
- errno = EINVAL;
- goto out_error;
- }
-
- if (sscanf(buf, "%lld\n", value) != 1) {
- errmsg("cannot read integer from \"%s\"\n", file);
- errno = EINVAL;
- goto out_error;
- }
-
- if (*value < 0) {
- errmsg("negative value %lld in \"%s\"", *value, file);
- errno = EINVAL;
- goto out_error;
- }
-
- if (close(fd))
- return sys_errmsg("close failed on \"%s\"", file);
-
- return 0;
-
-out_error:
- close(fd);
- return -1;
-}
-
-/**
- * read_hex_int - read an 'int' value from a file.
- * @file: the file to read from
- * @value: the result is stored here
- *
- * This function is the same as 'read_pos_ll()', but it reads an 'int'
- * value, not 'long long'.
- */
-static int read_hex_int(const char *file, int *value)
-{
- long long res;
-
- if (read_hex_ll(file, &res))
- return -1;
-
- /* Make sure the value has correct range */
- if (res > INT_MAX || res < INT_MIN) {
- errmsg("value %lld read from file \"%s\" is out of range",
- res, file);
- errno = EINVAL;
- return -1;
- }
-
- *value = res;
- return 0;
-}
-
-/**
- * read_pos_int - read a positive 'int' value from a file.
- * @file: the file to read from
- * @value: the result is stored here
- *
- * This function is the same as 'read_pos_ll()', but it reads an 'int'
- * value, not 'long long'.
- */
-static int read_pos_int(const char *file, int *value)
-{
- long long res;
-
- if (read_pos_ll(file, &res))
- return -1;
-
- /* Make sure the value is not too big */
- if (res > INT_MAX) {
- errmsg("value %lld read from file \"%s\" is out of range",
- res, file);
- errno = EINVAL;
- return -1;
- }
-
- *value = res;
- return 0;
-}
-
-/**
- * dev_read_hex_int - read an hex 'int' value from an MTD device sysfs file.
- * @patt: file pattern to read from
- * @mtd_num: MTD device number
- * @value: the result is stored here
- *
- * This function returns %0 in case of success and %-1 in case of failure.
- */
-static int dev_read_hex_int(const char *patt, int mtd_num, int *value)
-{
- char file[strlen(patt) + 50];
-
- sprintf(file, patt, mtd_num);
- return read_hex_int(file, value);
-}
-
-/**
- * dev_read_pos_int - read a positive 'int' value from an MTD device sysfs file.
- * @patt: file pattern to read from
- * @mtd_num: MTD device number
- * @value: the result is stored here
- *
- * This function returns %0 in case of success and %-1 in case of failure.
- */
-static int dev_read_pos_int(const char *patt, int mtd_num, int *value)
-{
- char file[strlen(patt) + 50];
-
- sprintf(file, patt, mtd_num);
- return read_pos_int(file, value);
-}
-
-/**
- * dev_read_pos_ll - read a positive 'long long' value from an MTD device sysfs file.
- * @patt: file pattern to read from
- * @mtd_num: MTD device number
- * @value: the result is stored here
- *
- * This function returns %0 in case of success and %-1 in case of failure.
- */
-static int dev_read_pos_ll(const char *patt, int mtd_num, long long *value)
-{
- char file[strlen(patt) + 50];
-
- sprintf(file, patt, mtd_num);
- return read_pos_ll(file, value);
-}
-
-/**
- * type_str2int - convert MTD device type to integer.
- * @str: MTD device type string to convert
- *
- * This function converts MTD device type string @str, read from sysfs, into an
- * integer.
- */
-static int type_str2int(const char *str)
-{
- if (!strcmp(str, "nand"))
- return MTD_NANDFLASH;
- if (!strcmp(str, "mlc-nand"))
- return MTD_MLCNANDFLASH;
- if (!strcmp(str, "nor"))
- return MTD_NORFLASH;
- if (!strcmp(str, "rom"))
- return MTD_ROM;
- if (!strcmp(str, "absent"))
- return MTD_ABSENT;
- if (!strcmp(str, "dataflash"))
- return MTD_DATAFLASH;
- if (!strcmp(str, "ram"))
- return MTD_RAM;
- if (!strcmp(str, "ubi"))
- return MTD_UBIVOLUME;
- return -1;
-}
-
-/**
- * dev_node2num - find UBI device number by its character device node.
- * @lib: MTD library descriptor
- * @node: name of the MTD device node
- * @mtd_num: MTD device number is returned here
- *
- * This function returns %0 in case of success and %-1 in case of failure.
- */
-static int dev_node2num(struct libmtd *lib, const char *node, int *mtd_num)
-{
- struct stat st;
- int i, mjr, mnr;
- struct mtd_info info;
-
- if (stat(node, &st))
- return sys_errmsg("cannot get information about \"%s\"", node);
-
- if (!S_ISCHR(st.st_mode)) {
- errmsg("\"%s\" is not a character device", node);
- errno = EINVAL;
- return -1;
- }
-
- mjr = major(st.st_rdev);
- mnr = minor(st.st_rdev);
-
- if (mtd_get_info((libmtd_t *)lib, &info))
- return -1;
-
- for (i = info.lowest_mtd_num; i <= info.highest_mtd_num; i++) {
- int mjr1, mnr1, ret;
-
- ret = dev_get_major(lib, i, &mjr1, &mnr1);
- if (ret) {
- if (errno == ENOENT)
- continue;
- if (!errno)
- break;
- return -1;
- }
-
- if (mjr1 == mjr && mnr1 == mnr) {
- errno = 0;
- *mtd_num = i;
- return 0;
- }
- }
-
- errno = ENODEV;
- return -1;
-}
-
-/**
- * sysfs_is_supported - check whether the MTD sub-system supports MTD.
- * @lib: MTD library descriptor
- *
- * The Linux kernel MTD subsystem gained MTD support starting from kernel
- * 2.6.30 and libmtd tries to use sysfs interface if possible, because the NAND
- * sub-page size is available there (and not available at all in pre-sysfs
- * kernels).
- *
- * Very old kernels did not have "/sys/class/mtd" directory. Not very old
- * kernels (e.g., 2.6.29) did have "/sys/class/mtd/mtdX" directories, by there
- * were no files there, e.g., the "name" file was not present. So all we can do
- * is to check for a "/sys/class/mtd/mtdX/name" file. But this is not a
- * reliable check, because if this is a new system with no MTD devices - we'll
- * treat it as a pre-sysfs system.
- */
-static int sysfs_is_supported(struct libmtd *lib)
-{
- int fd, num = -1;
- DIR *sysfs_mtd;
- char file[strlen(lib->mtd_name) + 10];
-
- sysfs_mtd = opendir(lib->sysfs_mtd);
- if (!sysfs_mtd) {
- if (errno == ENOENT) {
- errno = 0;
- return 0;
- }
- return sys_errmsg("cannot open \"%s\"", lib->sysfs_mtd);
- }
-
- /*
- * First of all find an "mtdX" directory. This is needed because there
- * may be, for example, mtd1 but no mtd0.
- */
- while (1) {
- int ret, mtd_num;
- char tmp_buf[256];
- struct dirent *dirent;
-
- dirent = readdir(sysfs_mtd);
- if (!dirent)
- break;
-
- if (strlen(dirent->d_name) >= 255) {
- errmsg("invalid entry in %s: \"%s\"",
- lib->sysfs_mtd, dirent->d_name);
- errno = EINVAL;
- closedir(sysfs_mtd);
- return -1;
- }
-
- ret = sscanf(dirent->d_name, MTD_NAME_PATT"%s",
- &mtd_num, tmp_buf);
- if (ret == 1) {
- num = mtd_num;
- break;
- }
- }
-
- if (closedir(sysfs_mtd))
- return sys_errmsg("closedir failed on \"%s\"", lib->sysfs_mtd);
-
- if (num == -1)
- /* No mtd device, treat this as pre-sysfs system */
- return 0;
-
- sprintf(file, lib->mtd_name, num);
- fd = open(file, O_RDONLY | O_CLOEXEC);
- if (fd == -1)
- return 0;
-
- if (close(fd)) {
- sys_errmsg("close failed on \"%s\"", file);
- return -1;
- }
-
- return 1;
-}
-
-libmtd_t libmtd_open(void)
-{
- struct libmtd *lib;
-
- lib = xzalloc(sizeof(*lib));
-
- lib->offs64_ioctls = OFFS64_IOCTLS_UNKNOWN;
-
- lib->sysfs_mtd = mkpath("/sys", SYSFS_MTD);
- if (!lib->sysfs_mtd)
- goto out_error;
-
- lib->mtd = mkpath(lib->sysfs_mtd, MTD_NAME_PATT);
- if (!lib->mtd)
- goto out_error;
-
- lib->mtd_name = mkpath(lib->mtd, MTD_NAME);
- if (!lib->mtd_name)
- goto out_error;
-
- if (!sysfs_is_supported(lib)) {
- free(lib->mtd);
- free(lib->sysfs_mtd);
- free(lib->mtd_name);
- lib->mtd_name = lib->mtd = lib->sysfs_mtd = NULL;
- return lib;
- }
-
- lib->mtd_dev = mkpath(lib->mtd, MTD_DEV);
- if (!lib->mtd_dev)
- goto out_error;
-
- lib->mtd_type = mkpath(lib->mtd, MTD_TYPE);
- if (!lib->mtd_type)
- goto out_error;
-
- lib->mtd_eb_size = mkpath(lib->mtd, MTD_EB_SIZE);
- if (!lib->mtd_eb_size)
- goto out_error;
-
- lib->mtd_size = mkpath(lib->mtd, MTD_SIZE);
- if (!lib->mtd_size)
- goto out_error;
-
- lib->mtd_min_io_size = mkpath(lib->mtd, MTD_MIN_IO_SIZE);
- if (!lib->mtd_min_io_size)
- goto out_error;
-
- lib->mtd_subpage_size = mkpath(lib->mtd, MTD_SUBPAGE_SIZE);
- if (!lib->mtd_subpage_size)
- goto out_error;
-
- lib->mtd_oob_size = mkpath(lib->mtd, MTD_OOB_SIZE);
- if (!lib->mtd_oob_size)
- goto out_error;
-
- lib->mtd_region_cnt = mkpath(lib->mtd, MTD_REGION_CNT);
- if (!lib->mtd_region_cnt)
- goto out_error;
-
- lib->mtd_flags = mkpath(lib->mtd, MTD_FLAGS);
- if (!lib->mtd_flags)
- goto out_error;
-
- lib->sysfs_supported = 1;
- return lib;
-
-out_error:
- libmtd_close((libmtd_t)lib);
- return NULL;
-}
-
-void libmtd_close(libmtd_t desc)
-{
- struct libmtd *lib = (struct libmtd *)desc;
-
- free(lib->mtd_flags);
- free(lib->mtd_region_cnt);
- free(lib->mtd_oob_size);
- free(lib->mtd_subpage_size);
- free(lib->mtd_min_io_size);
- free(lib->mtd_size);
- free(lib->mtd_eb_size);
- free(lib->mtd_type);
- free(lib->mtd_dev);
- free(lib->mtd_name);
- free(lib->mtd);
- free(lib->sysfs_mtd);
- free(lib);
-}
-
-int mtd_dev_present(libmtd_t desc, int mtd_num) {
- struct stat st;
- struct libmtd *lib = (struct libmtd *)desc;
-
- if (!lib->sysfs_supported) {
- return legacy_dev_present(mtd_num) == 1;
- } else {
- char file[strlen(lib->mtd) + 10];
-
- sprintf(file, lib->mtd, mtd_num);
- return !stat(file, &st);
- }
-}
-
-int mtd_get_info(libmtd_t desc, struct mtd_info *info)
-{
- DIR *sysfs_mtd;
- struct dirent *dirent;
- struct libmtd *lib = (struct libmtd *)desc;
-
- memset(info, 0, sizeof(struct mtd_info));
-
- if (!lib->sysfs_supported)
- return legacy_mtd_get_info(info);
-
- info->sysfs_supported = 1;
-
- /*
- * We have to scan the MTD sysfs directory to identify how many MTD
- * devices are present.
- */
- sysfs_mtd = opendir(lib->sysfs_mtd);
- if (!sysfs_mtd) {
- if (errno == ENOENT) {
- errno = ENODEV;
- return -1;
- }
- return sys_errmsg("cannot open \"%s\"", lib->sysfs_mtd);
- }
-
- info->lowest_mtd_num = INT_MAX;
- while (1) {
- int mtd_num, ret;
- char tmp_buf[256];
-
- errno = 0;
- dirent = readdir(sysfs_mtd);
- if (!dirent)
- break;
-
- if (strlen(dirent->d_name) >= 255) {
- errmsg("invalid entry in %s: \"%s\"",
- lib->sysfs_mtd, dirent->d_name);
- errno = EINVAL;
- goto out_close;
- }
-
- ret = sscanf(dirent->d_name, MTD_NAME_PATT"%s",
- &mtd_num, tmp_buf);
- if (ret == 1) {
- info->mtd_dev_cnt += 1;
- if (mtd_num > info->highest_mtd_num)
- info->highest_mtd_num = mtd_num;
- if (mtd_num < info->lowest_mtd_num)
- info->lowest_mtd_num = mtd_num;
- }
- }
-
- if (!dirent && errno) {
- sys_errmsg("readdir failed on \"%s\"", lib->sysfs_mtd);
- goto out_close;
- }
-
- if (closedir(sysfs_mtd))
- return sys_errmsg("closedir failed on \"%s\"", lib->sysfs_mtd);
-
- if (info->lowest_mtd_num == INT_MAX)
- info->lowest_mtd_num = 0;
-
- return 0;
-
-out_close:
- closedir(sysfs_mtd);
- return -1;
-}
-
-int mtd_get_dev_info1(libmtd_t desc, int mtd_num, struct mtd_dev_info *mtd)
-{
- int ret;
- struct libmtd *lib = (struct libmtd *)desc;
-
- memset(mtd, 0, sizeof(struct mtd_dev_info));
- mtd->mtd_num = mtd_num;
-
- if (!mtd_dev_present(desc, mtd_num)) {
- errno = ENODEV;
- return -1;
- } else if (!lib->sysfs_supported)
- return legacy_get_dev_info1(mtd_num, mtd);
-
- if (dev_get_major(lib, mtd_num, &mtd->major, &mtd->minor))
- return -1;
-
- ret = dev_read_data(lib->mtd_name, mtd_num, &mtd->name,
- MTD_NAME_MAX + 1);
- if (ret < 0)
- return -1;
- ((char *)mtd->name)[ret - 1] = '\0';
-
- ret = dev_read_data(lib->mtd_type, mtd_num, &mtd->type_str,
- MTD_TYPE_MAX + 1);
- if (ret < 0)
- return -1;
- ((char *)mtd->type_str)[ret - 1] = '\0';
-
- if (dev_read_pos_int(lib->mtd_eb_size, mtd_num, &mtd->eb_size))
- return -1;
- if (dev_read_pos_ll(lib->mtd_size, mtd_num, &mtd->size))
- return -1;
- if (dev_read_pos_int(lib->mtd_min_io_size, mtd_num, &mtd->min_io_size))
- return -1;
- if (dev_read_pos_int(lib->mtd_subpage_size, mtd_num, &mtd->subpage_size))
- return -1;
- if (dev_read_pos_int(lib->mtd_oob_size, mtd_num, &mtd->oob_size))
- return -1;
- if (dev_read_pos_int(lib->mtd_region_cnt, mtd_num, &mtd->region_cnt))
- return -1;
- if (dev_read_hex_int(lib->mtd_flags, mtd_num, &ret))
- return -1;
- mtd->writable = !!(ret & MTD_WRITEABLE);
-
- mtd->eb_cnt = mtd->size / mtd->eb_size;
- mtd->type = type_str2int(mtd->type_str);
- mtd->bb_allowed = !!(mtd->type == MTD_NANDFLASH ||
- mtd->type == MTD_MLCNANDFLASH);
-
- return 0;
-}
-
-int mtd_get_dev_info(libmtd_t desc, const char *node, struct mtd_dev_info *mtd)
-{
- int mtd_num;
- struct libmtd *lib = (struct libmtd *)desc;
-
- if (!lib->sysfs_supported)
- return legacy_get_dev_info(node, mtd);
-
- if (dev_node2num(lib, node, &mtd_num))
- return -1;
-
- return mtd_get_dev_info1(desc, mtd_num, mtd);
-}
-
-static inline int mtd_ioctl_error(const struct mtd_dev_info *mtd, int eb,
- const char *sreq)
-{
- return sys_errmsg("%s ioctl failed for eraseblock %d (mtd%d)",
- sreq, eb, mtd->mtd_num);
-}
-
-static int mtd_valid_erase_block(const struct mtd_dev_info *mtd, int eb)
-{
- if (eb < 0 || eb >= mtd->eb_cnt) {
- errmsg("bad eraseblock number %d, mtd%d has %d eraseblocks",
- eb, mtd->mtd_num, mtd->eb_cnt);
- errno = EINVAL;
- return -1;
- }
- return 0;
-}
-
-static int mtd_xlock(const struct mtd_dev_info *mtd, int fd, int eb, int req,
- const char *sreq)
-{
- int ret;
- struct erase_info_user ei;
-
- ret = mtd_valid_erase_block(mtd, eb);
- if (ret)
- return ret;
-
- ei.start = eb * mtd->eb_size;
- ei.length = mtd->eb_size;
-
- ret = ioctl(fd, req, &ei);
- if (ret < 0)
- return mtd_ioctl_error(mtd, eb, sreq);
-
- return 0;
-}
-#define mtd_xlock(mtd, fd, eb, req) mtd_xlock(mtd, fd, eb, req, #req)
-
-int mtd_lock(const struct mtd_dev_info *mtd, int fd, int eb)
-{
- return mtd_xlock(mtd, fd, eb, MEMLOCK);
-}
-
-int mtd_unlock(const struct mtd_dev_info *mtd, int fd, int eb)
-{
- return mtd_xlock(mtd, fd, eb, MEMUNLOCK);
-}
-
-int mtd_erase(libmtd_t desc, const struct mtd_dev_info *mtd, int fd, int eb)
-{
- int ret;
- struct libmtd *lib = (struct libmtd *)desc;
- struct erase_info_user64 ei64;
- struct erase_info_user ei;
-
- ret = mtd_valid_erase_block(mtd, eb);
- if (ret)
- return ret;
-
- ei64.start = (__u64)eb * mtd->eb_size;
- ei64.length = mtd->eb_size;
-
- if (lib->offs64_ioctls == OFFS64_IOCTLS_SUPPORTED ||
- lib->offs64_ioctls == OFFS64_IOCTLS_UNKNOWN) {
- ret = ioctl(fd, MEMERASE64, &ei64);
- if (ret == 0)
- return ret;
-
- if (errno != ENOTTY ||
- lib->offs64_ioctls != OFFS64_IOCTLS_UNKNOWN)
- return mtd_ioctl_error(mtd, eb, "MEMERASE64");
-
- /*
- * MEMERASE64 support was added in kernel version 2.6.31, so
- * probably we are working with older kernel and this ioctl is
- * not supported.
- */
- lib->offs64_ioctls = OFFS64_IOCTLS_NOT_SUPPORTED;
- }
-
- if (ei64.start + ei64.length > 0xFFFFFFFF) {
- errmsg("this system can address only %u eraseblocks",
- 0xFFFFFFFFU / mtd->eb_size);
- errno = EINVAL;
- return -1;
- }
-
- ei.start = ei64.start;
- ei.length = ei64.length;
- ret = ioctl(fd, MEMERASE, &ei);
- if (ret < 0)
- return mtd_ioctl_error(mtd, eb, "MEMERASE");
- return 0;
-}
-
-int mtd_regioninfo(int fd, int regidx, struct region_info_user *reginfo)
-{
- int ret;
-
- if (regidx < 0) {
- errno = ENODEV;
- return -1;
- }
-
- reginfo->regionindex = regidx;
-
- ret = ioctl(fd, MEMGETREGIONINFO, reginfo);
- if (ret < 0)
- return sys_errmsg("%s ioctl failed for erase region %d",
- "MEMGETREGIONINFO", regidx);
-
- return 0;
-}
-
-int mtd_is_locked(const struct mtd_dev_info *mtd, int fd, int eb)
-{
- int ret;
- erase_info_t ei;
-
- ei.start = eb * mtd->eb_size;
- ei.length = mtd->eb_size;
-
- ret = ioctl(fd, MEMISLOCKED, &ei);
- if (ret < 0) {
- if (errno != ENOTTY && errno != EOPNOTSUPP)
- return mtd_ioctl_error(mtd, eb, "MEMISLOCKED");
- else
- errno = EOPNOTSUPP;
- }
-
- return ret;
-}
-
-/* Patterns to write to a physical eraseblock when torturing it */
-static uint8_t patterns[] = {0xa5, 0x5a, 0x0};
-
-/**
- * check_pattern - check if buffer contains only a certain byte pattern.
- * @buf: buffer to check
- * @patt: the pattern to check
- * @size: buffer size in bytes
- *
- * This function returns %1 in there are only @patt bytes in @buf, and %0 if
- * something else was also found.
- */
-static int check_pattern(const void *buf, uint8_t patt, int size)
-{
- int i;
-
- for (i = 0; i < size; i++)
- if (((const uint8_t *)buf)[i] != patt)
- return 0;
- return 1;
-}
-
-int mtd_torture(libmtd_t desc, const struct mtd_dev_info *mtd, int fd, int eb)
-{
- int err, i, patt_count;
- void *buf;
-
- normsg("run torture test for PEB %d", eb);
- patt_count = ARRAY_SIZE(patterns);
-
- buf = xmalloc(mtd->eb_size);
-
- for (i = 0; i < patt_count; i++) {
- err = mtd_erase(desc, mtd, fd, eb);
- if (err)
- goto out;
-
- /* Make sure the PEB contains only 0xFF bytes */
- err = mtd_read(mtd, fd, eb, 0, buf, mtd->eb_size);
- if (err)
- goto out;
-
- err = check_pattern(buf, 0xFF, mtd->eb_size);
- if (err == 0) {
- errmsg("erased PEB %d, but a non-0xFF byte found", eb);
- errno = EIO;
- goto out;
- }
-
- /* Write a pattern and check it */
- memset(buf, patterns[i], mtd->eb_size);
- err = mtd_write(desc, mtd, fd, eb, 0, buf, mtd->eb_size, NULL,
- 0, 0);
- if (err)
- goto out;
-
- memset(buf, ~patterns[i], mtd->eb_size);
- err = mtd_read(mtd, fd, eb, 0, buf, mtd->eb_size);
- if (err)
- goto out;
-
- err = check_pattern(buf, patterns[i], mtd->eb_size);
- if (err == 0) {
- errmsg("pattern %x checking failed for PEB %d",
- patterns[i], eb);
- errno = EIO;
- goto out;
- }
- }
-
- err = 0;
- normsg("PEB %d passed torture test, do not mark it a bad", eb);
-
-out:
- free(buf);
- return -1;
-}
-
-int mtd_is_bad(const struct mtd_dev_info *mtd, int fd, int eb)
-{
- int ret;
- loff_t seek;
-
- ret = mtd_valid_erase_block(mtd, eb);
- if (ret)
- return ret;
-
- if (!mtd->bb_allowed)
- return 0;
-
- seek = (loff_t)eb * mtd->eb_size;
- ret = ioctl(fd, MEMGETBADBLOCK, &seek);
- if (ret == -1)
- return mtd_ioctl_error(mtd, eb, "MEMGETBADBLOCK");
- return ret;
-}
-
-int mtd_mark_bad(const struct mtd_dev_info *mtd, int fd, int eb)
-{
- int ret;
- loff_t seek;
-
- if (!mtd->bb_allowed) {
- errno = EINVAL;
- return -1;
- }
-
- ret = mtd_valid_erase_block(mtd, eb);
- if (ret)
- return ret;
-
- seek = (loff_t)eb * mtd->eb_size;
- ret = ioctl(fd, MEMSETBADBLOCK, &seek);
- if (ret == -1)
- return mtd_ioctl_error(mtd, eb, "MEMSETBADBLOCK");
- return 0;
-}
-
-int mtd_read(const struct mtd_dev_info *mtd, int fd, int eb, int offs,
- void *buf, int len)
-{
- int ret, rd = 0;
- off_t seek;
-
- ret = mtd_valid_erase_block(mtd, eb);
- if (ret)
- return ret;
-
- if (offs < 0 || offs + len > mtd->eb_size) {
- errmsg("bad offset %d or length %d, mtd%d eraseblock size is %d",
- offs, len, mtd->mtd_num, mtd->eb_size);
- errno = EINVAL;
- return -1;
- }
-
- /* Seek to the beginning of the eraseblock */
- seek = (off_t)eb * mtd->eb_size + offs;
- if (lseek(fd, seek, SEEK_SET) != seek)
- return sys_errmsg("cannot seek mtd%d to offset %"PRIdoff_t,
- mtd->mtd_num, seek);
-
- while (rd < len) {
- ret = read(fd, buf, len);
- if (ret < 0)
- return sys_errmsg("cannot read %d bytes from mtd%d (eraseblock %d, offset %d)",
- len, mtd->mtd_num, eb, offs);
- rd += ret;
- }
-
- return 0;
-}
-
-static int legacy_auto_oob_layout(const struct mtd_dev_info *mtd, int fd,
- int ooblen, void *oob) {
- struct nand_oobinfo old_oobinfo;
- int start, len;
- uint8_t *tmp_buf;
-
- /* Read the current oob info */
- if (ioctl(fd, MEMGETOOBSEL, &old_oobinfo))
- return sys_errmsg("MEMGETOOBSEL failed");
-
- tmp_buf = malloc(ooblen);
- memcpy(tmp_buf, oob, ooblen);
-
- /*
- * We use autoplacement and have the oobinfo with the autoplacement
- * information from the kernel available
- */
- if (old_oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
- int i, tags_pos = 0;
- for (i = 0; old_oobinfo.oobfree[i][1]; i++) {
- /* Set the reserved bytes to 0xff */
- start = old_oobinfo.oobfree[i][0];
- len = old_oobinfo.oobfree[i][1];
- memcpy(oob + start, tmp_buf + tags_pos, len);
- tags_pos += len;
- }
- } else {
- /* Set at least the ecc byte positions to 0xff */
- start = old_oobinfo.eccbytes;
- len = mtd->oob_size - start;
- memcpy(oob + start, tmp_buf + start, len);
- }
-
- return 0;
-}
-
-int mtd_write(libmtd_t desc, const struct mtd_dev_info *mtd, int fd, int eb,
- int offs, void *data, int len, void *oob, int ooblen,
- uint8_t mode)
-{
- int ret;
- off_t seek;
- struct mtd_write_req ops;
-
- ret = mtd_valid_erase_block(mtd, eb);
- if (ret)
- return ret;
-
- if (offs < 0 || offs + len > mtd->eb_size) {
- errmsg("bad offset %d or length %d, mtd%d eraseblock size is %d",
- offs, len, mtd->mtd_num, mtd->eb_size);
- errno = EINVAL;
- return -1;
- }
- if (offs % mtd->subpage_size) {
- errmsg("write offset %d is not aligned to mtd%d min. I/O size %d",
- offs, mtd->mtd_num, mtd->subpage_size);
- errno = EINVAL;
- return -1;
- }
- if (len % mtd->subpage_size) {
- errmsg("write length %d is not aligned to mtd%d min. I/O size %d",
- len, mtd->mtd_num, mtd->subpage_size);
- errno = EINVAL;
- return -1;
- }
-
- /* Calculate seek address */
- seek = (off_t)eb * mtd->eb_size + offs;
-
- if (oob) {
- ops.start = seek;
- ops.len = len;
- ops.ooblen = ooblen;
- ops.usr_data = (uint64_t)(unsigned long)data;
- ops.usr_oob = (uint64_t)(unsigned long)oob;
- ops.mode = mode;
-
- ret = ioctl(fd, MEMWRITE, &ops);
- if (ret == 0)
- return 0;
- else if (errno != ENOTTY && errno != EOPNOTSUPP)
- return mtd_ioctl_error(mtd, eb, "MEMWRITE");
-
- /* Fall back to old OOB ioctl() if necessary */
- if (mode == MTD_OPS_AUTO_OOB)
- if (legacy_auto_oob_layout(mtd, fd, ooblen, oob))
- return -1;
- if (mtd_write_oob(desc, mtd, fd, seek, ooblen, oob) < 0)
- return sys_errmsg("cannot write to OOB");
- }
- if (data) {
- /* Seek to the beginning of the eraseblock */
- if (lseek(fd, seek, SEEK_SET) != seek)
- return sys_errmsg("cannot seek mtd%d to offset %"PRIdoff_t,
- mtd->mtd_num, seek);
- ret = write(fd, data, len);
- if (ret != len)
- return sys_errmsg("cannot write %d bytes to mtd%d "
- "(eraseblock %d, offset %d)",
- len, mtd->mtd_num, eb, offs);
- }
-
- return 0;
-}
-
-int do_oob_op(libmtd_t desc, const struct mtd_dev_info *mtd, int fd,
- uint64_t start, uint64_t length, void *data, unsigned int cmd64,
- unsigned int cmd)
-{
- int ret, oob_offs;
- struct mtd_oob_buf64 oob64;
- struct mtd_oob_buf oob;
- unsigned long long max_offs;
- const char *cmd64_str, *cmd_str;
- struct libmtd *lib = (struct libmtd *)desc;
-
- if (cmd64 == MEMREADOOB64) {
- cmd64_str = "MEMREADOOB64";
- cmd_str = "MEMREADOOB";
- } else {
- cmd64_str = "MEMWRITEOOB64";
- cmd_str = "MEMWRITEOOB";
- }
-
- max_offs = (unsigned long long)mtd->eb_cnt * mtd->eb_size;
- if (start >= max_offs) {
- errmsg("bad page address %" PRIu64 ", mtd%d has %d eraseblocks (%llu bytes)",
- start, mtd->mtd_num, mtd->eb_cnt, max_offs);
- errno = EINVAL;
- return -1;
- }
-
- oob_offs = start & (mtd->min_io_size - 1);
- if (oob_offs + length > mtd->oob_size || length == 0) {
- errmsg("Cannot write %" PRIu64 " OOB bytes to address %" PRIu64 " (OOB offset %u) - mtd%d OOB size is only %d bytes",
- length, start, oob_offs, mtd->mtd_num, mtd->oob_size);
- errno = EINVAL;
- return -1;
- }
-
- oob64.start = start;
- oob64.length = length;
- oob64.usr_ptr = (uint64_t)(unsigned long)data;
-
- if (lib->offs64_ioctls == OFFS64_IOCTLS_SUPPORTED ||
- lib->offs64_ioctls == OFFS64_IOCTLS_UNKNOWN) {
- ret = ioctl(fd, cmd64, &oob64);
- if (ret == 0)
- return ret;
-
- if (errno != ENOTTY ||
- lib->offs64_ioctls != OFFS64_IOCTLS_UNKNOWN) {
- sys_errmsg("%s ioctl failed for mtd%d, offset %" PRIu64 " (eraseblock %" PRIu64 ")",
- cmd64_str, mtd->mtd_num, start, start / mtd->eb_size);
- }
-
- /*
- * MEMREADOOB64/MEMWRITEOOB64 support was added in kernel
- * version 2.6.31, so probably we are working with older kernel
- * and these ioctls are not supported.
- */
- lib->offs64_ioctls = OFFS64_IOCTLS_NOT_SUPPORTED;
- }
-
- if (oob64.start > 0xFFFFFFFFULL) {
- errmsg("this system can address only up to address %lu",
- 0xFFFFFFFFUL);
- errno = EINVAL;
- return -1;
- }
-
- oob.start = oob64.start;
- oob.length = oob64.length;
- oob.ptr = data;
-
- ret = ioctl(fd, cmd, &oob);
- if (ret < 0)
- sys_errmsg("%s ioctl failed for mtd%d, offset %" PRIu64 " (eraseblock %" PRIu64 ")",
- cmd_str, mtd->mtd_num, start, start / mtd->eb_size);
- return ret;
-}
-
-int mtd_read_oob(libmtd_t desc, const struct mtd_dev_info *mtd, int fd,
- uint64_t start, uint64_t length, void *data)
-{
- return do_oob_op(desc, mtd, fd, start, length, data,
- MEMREADOOB64, MEMREADOOB);
-}
-
-int mtd_write_oob(libmtd_t desc, const struct mtd_dev_info *mtd, int fd,
- uint64_t start, uint64_t length, void *data)
-{
- return do_oob_op(desc, mtd, fd, start, length, data,
- MEMWRITEOOB64, MEMWRITEOOB);
-}
-
-int mtd_write_img(const struct mtd_dev_info *mtd, int fd, int eb, int offs,
- const char *img_name)
-{
- int tmp, ret, in_fd, len, written = 0;
- off_t seek;
- struct stat st;
- char *buf;
-
- ret = mtd_valid_erase_block(mtd, eb);
- if (ret)
- return ret;
-
- if (offs < 0 || offs >= mtd->eb_size) {
- errmsg("bad offset %d, mtd%d eraseblock size is %d",
- offs, mtd->mtd_num, mtd->eb_size);
- errno = EINVAL;
- return -1;
- }
- if (offs % mtd->subpage_size) {
- errmsg("write offset %d is not aligned to mtd%d min. I/O size %d",
- offs, mtd->mtd_num, mtd->subpage_size);
- errno = EINVAL;
- return -1;
- }
-
- in_fd = open(img_name, O_RDONLY | O_CLOEXEC);
- if (in_fd == -1)
- return sys_errmsg("cannot open \"%s\"", img_name);
-
- if (fstat(in_fd, &st)) {
- sys_errmsg("cannot stat %s", img_name);
- goto out_close;
- }
-
- len = st.st_size;
- if (len % mtd->subpage_size) {
- errmsg("size of \"%s\" is %d byte, which is not aligned to "
- "mtd%d min. I/O size %d", img_name, len, mtd->mtd_num,
- mtd->subpage_size);
- errno = EINVAL;
- goto out_close;
- }
- tmp = (offs + len + mtd->eb_size - 1) / mtd->eb_size;
- if (eb + tmp > mtd->eb_cnt) {
- errmsg("\"%s\" image size is %d bytes, mtd%d size is %d "
- "eraseblocks, the image does not fit if we write it "
- "starting from eraseblock %d, offset %d",
- img_name, len, mtd->mtd_num, mtd->eb_cnt, eb, offs);
- errno = EINVAL;
- goto out_close;
- }
-
- /* Seek to the beginning of the eraseblock */
- seek = (off_t)eb * mtd->eb_size + offs;
- if (lseek(fd, seek, SEEK_SET) != seek) {
- sys_errmsg("cannot seek mtd%d to offset %"PRIdoff_t,
- mtd->mtd_num, seek);
- goto out_close;
- }
-
- buf = xmalloc(mtd->eb_size);
-
- while (written < len) {
- int rd = 0;
-
- do {
- ret = read(in_fd, buf, mtd->eb_size - offs - rd);
- if (ret == -1) {
- sys_errmsg("cannot read \"%s\"", img_name);
- goto out_free;
- }
- rd += ret;
- } while (ret && rd < mtd->eb_size - offs);
-
- ret = write(fd, buf, rd);
- if (ret != rd) {
- sys_errmsg("cannot write %d bytes to mtd%d (eraseblock %d, offset %d)",
- len, mtd->mtd_num, eb, offs);
- goto out_free;
- }
-
- offs = 0;
- eb += 1;
- written += rd;
- }
-
- free(buf);
- close(in_fd);
- return 0;
-
-out_free:
- free(buf);
-out_close:
- close(in_fd);
- return -1;
-}
-
-int mtd_probe_node(libmtd_t desc, const char *node)
-{
- struct stat st;
- struct mtd_info info;
- int i, mjr, mnr;
- struct libmtd *lib = (struct libmtd *)desc;
-
- if (stat(node, &st))
- return sys_errmsg("cannot get information about \"%s\"", node);
-
- if (!S_ISCHR(st.st_mode)) {
- errmsg("\"%s\" is not a character device", node);
- errno = EINVAL;
- return -1;
- }
-
- mjr = major(st.st_rdev);
- mnr = minor(st.st_rdev);
-
- if (mtd_get_info((libmtd_t *)lib, &info))
- return -1;
-
- if (!lib->sysfs_supported)
- return 0;
-
- for (i = info.lowest_mtd_num; i <= info.highest_mtd_num; i++) {
- int mjr1, mnr1, ret;
-
- ret = dev_get_major(lib, i, &mjr1, &mnr1);
- if (ret) {
- if (errno == ENOENT)
- continue;
- if (!errno)
- break;
- return -1;
- }
-
- if (mjr1 == mjr && mnr1 == mnr)
- return 1;
- }
-
- errno = 0;
- return -1;
-}
projects / fio.git / commitdiff