diff options
Diffstat (limited to 'ubi-utils/libubi.c')
| -rw-r--r-- | ubi-utils/libubi.c | 1391 |
1 files changed, 0 insertions, 1391 deletions
diff --git a/ubi-utils/libubi.c b/ubi-utils/libubi.c deleted file mode 100644 index 758d351..0000000 --- a/ubi-utils/libubi.c +++ /dev/null @@ -1,1391 +0,0 @@ -/* - * Copyright (c) International Business Machines Corp., 2006 - * - * 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 - * - * UBI (Unsorted Block Images) library. - */ - -#define PROGRAM_NAME "libubi" - -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <fcntl.h> -#include <dirent.h> -#include <unistd.h> -#include <limits.h> -#include <sys/ioctl.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <libubi.h> -#include "libubi_int.h" -#include "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; - int len1 = strlen(path); - int len2 = strlen(name); - - n = malloc(len1 + len2 + 2); - if (!n) { - sys_errmsg("cannot allocate %d bytes", len1 + len2 + 2); - return NULL; - } - - memcpy(n, path, len1); - if (n[len1 - 1] != '/') - n[len1++] = '/'; - - memcpy(n + len1, name, len2 + 1); - return n; -} - -/** - * read_positive_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_positive_ll(const char *file, long long *value) -{ - int fd, rd; - char buf[50]; - - fd = open(file, O_RDONLY); - 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, "%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_positive_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_positive_ll()', but it reads an 'int' - * value, not 'long long'. - */ -static int read_positive_int(const char *file, int *value) -{ - long long res; - - if (read_positive_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; -} - -/** - * 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); - 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)) - return sys_errmsg("close failed on \"%s\"", file); - - 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 succes, 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_read_int - read a positive 'int' value from an UBI device sysfs file. - * @patt: file pattern to read from - * @dev_num: UBI 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_int(const char *patt, int dev_num, int *value) -{ - char file[strlen(patt) + 50]; - - sprintf(file, patt, dev_num); - return read_positive_int(file, value); -} - -/** - * vol_read_int - read a positive 'int' value from an UBI volume sysfs file. - * @patt: file pattern to read from - * @dev_num: UBI device number - * @vol_id: volume ID - * @value: the result is stored here - * - * This function returns %0 in case of success and %-1 in case of failure. - */ -static int vol_read_int(const char *patt, int dev_num, int vol_id, int *value) -{ - char file[strlen(patt) + 100]; - - sprintf(file, patt, dev_num, vol_id); - return read_positive_int(file, value); -} - -/** - * dev_read_ll - read a positive 'long long' value from an UBI device sysfs file. - * @patt: file pattern to read from - * @dev_num: UBI 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_ll(const char *patt, int dev_num, long long *value) -{ - char file[strlen(patt) + 50]; - - sprintf(file, patt, dev_num); - return read_positive_ll(file, value); -} - -/** - * vol_read_ll - read a positive 'long long' value from an UBI volume sysfs file. - * @patt: file pattern to read from - * @dev_num: UBI device number - * @vol_id: volume ID - * @value: the result is stored here - * - * This function returns %0 in case of success and %-1 in case of failure. - */ -static int vol_read_ll(const char *patt, int dev_num, int vol_id, - long long *value) -{ - char file[strlen(patt) + 100]; - - sprintf(file, patt, dev_num, vol_id); - return read_positive_ll(file, value); -} - -/** - * vol_read_data - read data from an UBI volume's sysfs file. - * @patt: file pattern to read from - * @dev_num: UBI device number - * @vol_id: volume ID - * @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 vol_read_data(const char *patt, int dev_num, int vol_id, void *buf, - int buf_len) -{ - char file[strlen(patt) + 100]; - - sprintf(file, patt, dev_num, vol_id); - return read_data(file, buf, buf_len); -} - -/** - * dev_get_major - get major and minor numbers of an UBI device. - * @lib: libubi descriptor - * @dev_num: UBI device number - * @major: major number is returned here - * @minor: minor number is returned here - * - * This function returns zero in case of succes and %-1 in case of failure. - */ -static int dev_get_major(struct libubi *lib, int dev_num, int *major, int *minor) -{ - char file[strlen(lib->dev_dev) + 50]; - - sprintf(file, lib->dev_dev, dev_num); - return read_major(file, major, minor); -} - -/** - * vol_get_major - get major and minor numbers of an UBI volume. - * @lib: libubi descriptor - * @dev_num: UBI device number - * @vol_id: volume ID - * @major: major number is returned here - * @minor: minor number is returned here - * - * This function returns zero in case of succes and %-1 in case of failure. - */ -static int vol_get_major(struct libubi *lib, int dev_num, int vol_id, - int *major, int *minor) -{ - char file[strlen(lib->vol_dev) + 100]; - - sprintf(file, lib->vol_dev, dev_num, vol_id); - return read_major(file, major, minor); -} - -/** - * vol_node2nums - find UBI device number and volume ID by volume device node - * file. - * @lib: UBI library descriptor - * @node: UBI character device node name - * @dev_num: UBI device number is returned here - * @vol_id: volume ID is returned hers - * - * This function returns zero in case of succes and %-1 in case of failure. - */ -static int vol_node2nums(struct libubi *lib, const char *node, int *dev_num, - int *vol_id) -{ - struct stat st; - struct ubi_info info; - int i, fd, major, minor; - char file[strlen(lib->ubi_vol) + 100]; - - if (stat(node, &st)) - return sys_errmsg("cannot get information about \"%s\"", - node); - - if (!S_ISCHR(st.st_mode)) { - errno = EINVAL; - return errmsg("\"%s\" is not a character device", node); - } - - major = major(st.st_rdev); - minor = minor(st.st_rdev); - - if (minor == 0) { - errno = EINVAL; - return errmsg("\"%s\" is not a volume character device", node); - } - - if (ubi_get_info((libubi_t *)lib, &info)) - return -1; - - for (i = info.lowest_dev_num; i <= info.highest_dev_num; i++) { - int major1, minor1, ret; - - ret = dev_get_major(lib, i, &major1, &minor1); - if (ret) { - if (errno == ENOENT) - continue; - return -1; - } - - if (major1 == major) - break; - } - - if (i > info.highest_dev_num) { - errno = ENODEV; - return -1; - } - - /* Make sure this UBI volume exists */ - sprintf(file, lib->ubi_vol, i, minor - 1); - fd = open(file, O_RDONLY); - if (fd == -1) { - errno = ENODEV; - return -1; - } - - if (close(fd)) - return sys_errmsg("close failed on \"%s\"", file); - - *dev_num = i; - *vol_id = minor - 1; - errno = 0; - return 0; -} - -/** - * dev_node2num - find UBI device number by its character device node. - * @lib: UBI library descriptor - * @node: UBI character device node name - * @dev_num: UBI device number is returned here - * - * This function returns %0 in case of success and %-1 in case of failure. - */ -static int dev_node2num(struct libubi *lib, const char *node, int *dev_num) -{ - struct stat st; - struct ubi_info info; - int i, major, minor; - - if (stat(node, &st)) - return sys_errmsg("cannot get information about \"%s\"", node); - - if (!S_ISCHR(st.st_mode)) { - errno = EINVAL; - return errmsg("\"%s\" is not a character device", node); - } - - major = major(st.st_rdev); - minor = minor(st.st_rdev); - - if (minor != 0) { - errno = EINVAL; - return errmsg("\"%s\" is not an UBI character device", node); - } - - if (ubi_get_info((libubi_t *)lib, &info)) - return -1; - - for (i = info.lowest_dev_num; i <= info.highest_dev_num; i++) { - int major1, minor1, ret; - - ret = dev_get_major(lib, i, &major1, &minor1); - if (ret) { - if (errno == ENOENT) - continue; - return -1; - } - - if (major1 == major) { - if (minor1 != 0) { - errmsg("UBI character device minor number is " - "%d, but must be 0", minor1); - errno = EINVAL; - return -1; - } - errno = 0; - *dev_num = i; - return 0; - } - } - - errno = ENODEV; - return -1; -} - -int mtd_num2ubi_dev(libubi_t desc, int mtd_num, int *dev_num) -{ - struct ubi_info info; - int i, ret, mtd_num1; - struct libubi *lib = desc; - - if (ubi_get_info(desc, &info)) - return -1; - - for (i = info.lowest_dev_num; i <= info.highest_dev_num; i++) { - ret = dev_read_int(lib->dev_mtd_num, i, &mtd_num1); - if (ret) { - if (errno == ENOENT) - continue; - return -1; - } - - if (mtd_num1 == mtd_num) { - errno = 0; - *dev_num = i; - return 0; - } - } - - errno = 0; - return -1; -} - -libubi_t libubi_open(void) -{ - int fd, version; - struct libubi *lib; - - lib = calloc(1, sizeof(struct libubi)); - if (!lib) - return NULL; - - lib->sysfs_ctrl = mkpath(SYSFS_ROOT, SYSFS_CTRL); - if (!lib->sysfs_ctrl) - goto out_error; - - lib->ctrl_dev = mkpath(lib->sysfs_ctrl, CTRL_DEV); - if (!lib->ctrl_dev) - goto out_error; - - lib->sysfs_ubi = mkpath(SYSFS_ROOT, SYSFS_UBI); - if (!lib->sysfs_ubi) - goto out_error; - - /* Make sure UBI is present */ - fd = open(lib->sysfs_ubi, O_RDONLY); - if (fd == -1) { - errno = 0; - goto out_error; - } - - if (close(fd)) { - sys_errmsg("close failed on \"%s\"", lib->sysfs_ubi); - goto out_error; - } - - lib->ubi_dev = mkpath(lib->sysfs_ubi, UBI_DEV_NAME_PATT); - if (!lib->ubi_dev) - goto out_error; - - lib->ubi_version = mkpath(lib->sysfs_ubi, UBI_VER); - if (!lib->ubi_version) - goto out_error; - - lib->dev_dev = mkpath(lib->ubi_dev, DEV_DEV); - if (!lib->dev_dev) - goto out_error; - - lib->dev_avail_ebs = mkpath(lib->ubi_dev, DEV_AVAIL_EBS); - if (!lib->dev_avail_ebs) - goto out_error; - - lib->dev_total_ebs = mkpath(lib->ubi_dev, DEV_TOTAL_EBS); - if (!lib->dev_total_ebs) - goto out_error; - - lib->dev_bad_count = mkpath(lib->ubi_dev, DEV_BAD_COUNT); - if (!lib->dev_bad_count) - goto out_error; - - lib->dev_eb_size = mkpath(lib->ubi_dev, DEV_EB_SIZE); - if (!lib->dev_eb_size) - goto out_error; - - lib->dev_max_ec = mkpath(lib->ubi_dev, DEV_MAX_EC); - if (!lib->dev_max_ec) - goto out_error; - - lib->dev_bad_rsvd = mkpath(lib->ubi_dev, DEV_MAX_RSVD); - if (!lib->dev_bad_rsvd) - goto out_error; - - lib->dev_max_vols = mkpath(lib->ubi_dev, DEV_MAX_VOLS); - if (!lib->dev_max_vols) - goto out_error; - - lib->dev_min_io_size = mkpath(lib->ubi_dev, DEV_MIN_IO_SIZE); - if (!lib->dev_min_io_size) - goto out_error; - - lib->dev_mtd_num = mkpath(lib->ubi_dev, DEV_MTD_NUM); - if (!lib->dev_mtd_num) - goto out_error; - - lib->ubi_vol = mkpath(lib->sysfs_ubi, UBI_VOL_NAME_PATT); - if (!lib->ubi_vol) - goto out_error; - - lib->vol_type = mkpath(lib->ubi_vol, VOL_TYPE); - if (!lib->vol_type) - goto out_error; - - lib->vol_dev = mkpath(lib->ubi_vol, VOL_DEV); - if (!lib->vol_dev) - goto out_error; - - lib->vol_alignment = mkpath(lib->ubi_vol, VOL_ALIGNMENT); - if (!lib->vol_alignment) - goto out_error; - - lib->vol_data_bytes = mkpath(lib->ubi_vol, VOL_DATA_BYTES); - if (!lib->vol_data_bytes) - goto out_error; - - lib->vol_rsvd_ebs = mkpath(lib->ubi_vol, VOL_RSVD_EBS); - if (!lib->vol_rsvd_ebs) - goto out_error; - - lib->vol_eb_size = mkpath(lib->ubi_vol, VOL_EB_SIZE); - if (!lib->vol_eb_size) - goto out_error; - - lib->vol_corrupted = mkpath(lib->ubi_vol, VOL_CORRUPTED); - if (!lib->vol_corrupted) - goto out_error; - - lib->vol_name = mkpath(lib->ubi_vol, VOL_NAME); - if (!lib->vol_name) - goto out_error; - - if (read_positive_int(lib->ubi_version, &version)) - goto out_error; - if (version != LIBUBI_UBI_VERSION) { - errmsg("this library was made for UBI version %d, but UBI " - "version %d is detected\n", LIBUBI_UBI_VERSION, version); - goto out_error; - } - - return lib; - -out_error: - libubi_close((libubi_t)lib); - return NULL; -} - -void libubi_close(libubi_t desc) -{ - struct libubi *lib = (struct libubi *)desc; - - free(lib->vol_name); - free(lib->vol_corrupted); - free(lib->vol_eb_size); - free(lib->vol_rsvd_ebs); - free(lib->vol_data_bytes); - free(lib->vol_alignment); - free(lib->vol_dev); - free(lib->vol_type); - free(lib->ubi_vol); - free(lib->dev_mtd_num); - free(lib->dev_min_io_size); - free(lib->dev_max_vols); - free(lib->dev_bad_rsvd); - free(lib->dev_max_ec); - free(lib->dev_eb_size); - free(lib->dev_bad_count); - free(lib->dev_total_ebs); - free(lib->dev_avail_ebs); - free(lib->dev_dev); - free(lib->ubi_version); - free(lib->ubi_dev); - free(lib->sysfs_ubi); - free(lib->ctrl_dev); - free(lib->sysfs_ctrl); - free(lib); -} - -/** - * do_attach - perform the actual attach operation. - * @node: name of the UBI control character device node - * @r: attach request - * - * This function performs the actual UBI attach operation. Returns %0 in case of - * success and %-1 in case of failure. @r->ubi_num contains newly created UBI - * device number. - */ -static int do_attach(const char *node, const struct ubi_attach_req *r) -{ - int fd, ret; - - fd = open(node, O_RDONLY); - if (fd == -1) - return sys_errmsg("cannot open \"%s\"", node); - - ret = ioctl(fd, UBI_IOCATT, r); - close(fd); - if (ret == -1) - return -1; - -#ifdef UDEV_SETTLE_HACK -// if (system("udevsettle") == -1) -// return -1; - usleep(100000); -#endif - return ret; -} - -#ifndef MTD_CHAR_MAJOR -/* - * This is taken from kernel <linux/mtd/mtd.h> and is unlikely to change anytime - * soon. - */ -#define MTD_CHAR_MAJOR 90 -#endif - -/** - * mtd_node_to_num - converts device node to MTD number. - * @mtd_dev_node: path to device node to convert - * - * This function converts given @mtd_dev_node to MTD device number. - * @mtd_dev_node should contain path to the MTD device node. Returns MTD device - * number in case of success and %-1 in case of failure (errno is set). - */ -static int mtd_node_to_num(const char *mtd_dev_node) -{ - int major, minor; - struct stat sb; - - if (stat(mtd_dev_node, &sb) < 0) - return sys_errmsg("cannot stat \"%s\"", mtd_dev_node); - - if (!S_ISCHR(sb.st_mode)) { - errno = EINVAL; - return sys_errmsg("\"%s\" is not a character device", - mtd_dev_node); - } - - major = major(sb.st_rdev); - minor = minor(sb.st_rdev); - - if (major != MTD_CHAR_MAJOR) { - errno = EINVAL; - return sys_errmsg("\"%s\" is not an MTD device", mtd_dev_node); - } - - return minor / 2; -} - -int ubi_attach(libubi_t desc, const char *node, struct ubi_attach_request *req) -{ - struct ubi_attach_req r; - int ret; - - (void)desc; - - if (req->mtd_dev_node) { - /* - * User has passed path to device node. Lets find out MTD - * device number of the device and update req->mtd_num with it - */ - req->mtd_num = mtd_node_to_num(req->mtd_dev_node); - if (req->mtd_num == -1) - return -1; - } - - memset(&r, 0, sizeof(struct ubi_attach_req)); - r.ubi_num = req->dev_num; - r.mtd_num = req->mtd_num; - r.vid_hdr_offset = req->vid_hdr_offset; - - if (req->max_beb_per1024) { - /* - * We first have to check if the running kernel supports the - * 'max_beb_per1024' parameter. To do this, we invoke the - * "attach" ioctl 2 times: first with incorrect value %-1 of - * 'max_beb_per1024'. - * - * If the ioctl succeeds, it means that the kernel doesn't - * support the feature and just ignored our 'max_beb_per1024' - * value. - * - * If the ioctl returns -EINVAL, we assume this is because - * 'max_beb_per1024' was set to -1, and we invoke the ioctl for - * the second time with the 'max_beb_per1024' value. - */ - r.max_beb_per1024 = -1; - ret = do_attach(node, &r); - if (ret == 0) { - req->dev_num = r.ubi_num; - /* - * The call succeeded. It means that the kernel ignored - * 'max_beb_per1024' parameter. - */ - return 1; - } else if (errno != EINVAL) - return ret; - } - - r.max_beb_per1024 = req->max_beb_per1024; - - ret = do_attach(node, &r); - if (ret == 0) - req->dev_num = r.ubi_num; - - return ret; -} - -int ubi_detach_mtd(libubi_t desc, const char *node, int mtd_num) -{ - int ret, ubi_dev; - - ret = mtd_num2ubi_dev(desc, mtd_num, &ubi_dev); - if (ret == -1) { - errno = ENODEV; - return ret; - } - - return ubi_remove_dev(desc, node, ubi_dev); -} - -int ubi_detach(libubi_t desc, const char *node, const char *mtd_dev_node) -{ - int mtd_num; - - if (!mtd_dev_node) { - errno = EINVAL; - return -1; - } - - mtd_num = mtd_node_to_num(mtd_dev_node); - if (mtd_num == -1) - return -1; - - return ubi_detach_mtd(desc, node, mtd_num); -} - -int ubi_remove_dev(libubi_t desc, const char *node, int ubi_dev) -{ - int fd, ret; - - desc = desc; - - fd = open(node, O_RDONLY); - if (fd == -1) - return sys_errmsg("cannot open \"%s\"", node); - ret = ioctl(fd, UBI_IOCDET, &ubi_dev); - if (ret == -1) - goto out_close; - -#ifdef UDEV_SETTLE_HACK -// if (system("udevsettle") == -1) -// return -1; - usleep(100000); -#endif - -out_close: - close(fd); - return ret; -} - -int ubi_probe_node(libubi_t desc, const char *node) -{ - struct stat st; - struct ubi_info info; - int i, fd, major, minor; - struct libubi *lib = (struct libubi *)desc; - char file[strlen(lib->ubi_vol) + 100]; - - 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; - } - - major = major(st.st_rdev); - minor = minor(st.st_rdev); - - if (ubi_get_info((libubi_t *)lib, &info)) - return -1; - - for (i = info.lowest_dev_num; i <= info.highest_dev_num; i++) { - int major1, minor1, ret; - - ret = dev_get_major(lib, i, &major1, &minor1); - if (ret) { - if (errno == ENOENT) - continue; - if (!errno) - goto out_not_ubi; - return -1; - } - - if (major1 == major) - break; - } - - if (i > info.highest_dev_num) - goto out_not_ubi; - - if (minor == 0) - return 1; - - /* This is supposdely an UBI volume device node */ - sprintf(file, lib->ubi_vol, i, minor - 1); - fd = open(file, O_RDONLY); - if (fd == -1) - goto out_not_ubi; - - if (close(fd)) - sys_errmsg("close failed on \"%s\"", file); - - return 2; - -out_not_ubi: - errmsg("\"%s\" has major:minor %d:%d, but this does not correspond to " - "any existing UBI device or volume", node, major, minor); - errno = ENODEV; - return -1; -} - -int ubi_get_info(libubi_t desc, struct ubi_info *info) -{ - DIR *sysfs_ubi; - struct dirent *dirent; - struct libubi *lib = (struct libubi *)desc; - - memset(info, 0, sizeof(struct ubi_info)); - - if (read_major(lib->ctrl_dev, &info->ctrl_major, &info->ctrl_minor)) { - /* - * Older UBI versions did not have control device, so we do not - * panic here for compatibility reasons. May be few years later - * we could return -1 here, but for now just set major:minor to - * -1. - */ - info->ctrl_major = info->ctrl_minor = -1; - } - - /* - * We have to scan the UBI sysfs directory to identify how many UBI - * devices are present. - */ - sysfs_ubi = opendir(lib->sysfs_ubi); - if (!sysfs_ubi) - return -1; - - info->lowest_dev_num = INT_MAX; - while (1) { - int dev_num, ret; - char tmp_buf[256]; - - errno = 0; - dirent = readdir(sysfs_ubi); - if (!dirent) - break; - - if (strlen(dirent->d_name) >= 255) { - errmsg("invalid entry in %s: \"%s\"", - lib->sysfs_ubi, dirent->d_name); - errno = EINVAL; - goto out_close; - } - - ret = sscanf(dirent->d_name, UBI_DEV_NAME_PATT"%s", - &dev_num, tmp_buf); - if (ret == 1) { - info->dev_count += 1; - if (dev_num > info->highest_dev_num) - info->highest_dev_num = dev_num; - if (dev_num < info->lowest_dev_num) - info->lowest_dev_num = dev_num; - } - } - - if (!dirent && errno) { - sys_errmsg("readdir failed on \"%s\"", lib->sysfs_ubi); - goto out_close; - } - - if (closedir(sysfs_ubi)) - return sys_errmsg("closedir failed on \"%s\"", lib->sysfs_ubi); - - if (info->lowest_dev_num == INT_MAX) - info->lowest_dev_num = 0; - - if (read_positive_int(lib->ubi_version, &info->version)) - return -1; - - return 0; - -out_close: - closedir(sysfs_ubi); - return -1; -} - -int ubi_mkvol(libubi_t desc, const char *node, struct ubi_mkvol_request *req) -{ - int fd, ret; - struct ubi_mkvol_req r; - size_t n; - - memset(&r, 0, sizeof(struct ubi_mkvol_req)); - - desc = desc; - r.vol_id = req->vol_id; - r.alignment = req->alignment; - r.bytes = req->bytes; - r.vol_type = req->vol_type; - - n = strlen(req->name); - if (n > UBI_MAX_VOLUME_NAME) - return -1; - - strncpy(r.name, req->name, UBI_MAX_VOLUME_NAME + 1); - r.name_len = n; - - desc = desc; - fd = open(node, O_RDONLY); - if (fd == -1) - return sys_errmsg("cannot open \"%s\"", node); - - ret = ioctl(fd, UBI_IOCMKVOL, &r); - if (ret == -1) { - close(fd); - return ret; - } - - close(fd); - req->vol_id = r.vol_id; - -#ifdef UDEV_SETTLE_HACK -// if (system("udevsettle") == -1) -// return -1; - usleep(100000); -#endif - - return 0; -} - -int ubi_rmvol(libubi_t desc, const char *node, int vol_id) -{ - int fd, ret; - - desc = desc; - fd = open(node, O_RDONLY); - if (fd == -1) - return sys_errmsg("cannot open \"%s\"", node); - - ret = ioctl(fd, UBI_IOCRMVOL, &vol_id); - if (ret == -1) { - close(fd); - return ret; - } - - close(fd); - -#ifdef UDEV_SETTLE_HACK -// if (system("udevsettle") == -1) -// return -1; - usleep(100000); -#endif - - return 0; -} - -int ubi_rnvols(libubi_t desc, const char *node, struct ubi_rnvol_req *rnvol) -{ - int fd, ret; - - desc = desc; - fd = open(node, O_RDONLY); - if (fd == -1) - return -1; - - ret = ioctl(fd, UBI_IOCRNVOL, rnvol); - if (ret == -1) { - close(fd); - return ret; - } - - close(fd); - -#ifdef UDEV_SETTLE_HACK -// if (system("udevsettle") == -1) -// return -1; - usleep(100000); -#endif - - return 0; -} - -int ubi_rsvol(libubi_t desc, const char *node, int vol_id, long long bytes) -{ - int fd, ret; - struct ubi_rsvol_req req; - - desc = desc; - fd = open(node, O_RDONLY); - if (fd == -1) - return sys_errmsg("cannot open \"%s\"", node); - - req.bytes = bytes; - req.vol_id = vol_id; - - ret = ioctl(fd, UBI_IOCRSVOL, &req); - close(fd); - return ret; -} - -int ubi_vol_block_create(int fd) -{ - return ioctl(fd, UBI_IOCVOLCRBLK); -} - -int ubi_vol_block_remove(int fd) -{ - return ioctl(fd, UBI_IOCVOLRMBLK); -} - -int ubi_update_start(libubi_t desc, int fd, long long bytes) -{ - desc = desc; - if (ioctl(fd, UBI_IOCVOLUP, &bytes)) - return -1; - return 0; -} - -int ubi_leb_change_start(libubi_t desc, int fd, int lnum, int bytes) -{ - struct ubi_leb_change_req req; - - desc = desc; - memset(&req, 0, sizeof(struct ubi_leb_change_req)); - req.lnum = lnum; - req.bytes = bytes; - req.dtype = 3; - - if (ioctl(fd, UBI_IOCEBCH, &req)) - return -1; - return 0; -} - -int ubi_dev_present(libubi_t desc, int dev_num) -{ - struct stat st; - struct libubi *lib = (struct libubi *)desc; - char file[strlen(lib->ubi_dev) + 50]; - - sprintf(file, lib->ubi_dev, dev_num); - return !stat(file, &st); -} - -int ubi_get_dev_info1(libubi_t desc, int dev_num, struct ubi_dev_info *info) -{ - DIR *sysfs_ubi; - struct dirent *dirent; - struct libubi *lib = (struct libubi *)desc; - - memset(info, 0, sizeof(struct ubi_dev_info)); - info->dev_num = dev_num; - - if (!ubi_dev_present(desc, dev_num)) - return -1; - - sysfs_ubi = opendir(lib->sysfs_ubi); - if (!sysfs_ubi) - return -1; - - info->lowest_vol_id = INT_MAX; - - while (1) { - int vol_id, ret, devno; - char tmp_buf[256]; - - errno = 0; - dirent = readdir(sysfs_ubi); - if (!dirent) - break; - - if (strlen(dirent->d_name) >= 255) { - errmsg("invalid entry in %s: \"%s\"", - lib->sysfs_ubi, dirent->d_name); - goto out_close; - } - - ret = sscanf(dirent->d_name, UBI_VOL_NAME_PATT"%s", &devno, &vol_id, tmp_buf); - if (ret == 2 && devno == dev_num) { - info->vol_count += 1; - if (vol_id > info->highest_vol_id) - info->highest_vol_id = vol_id; - if (vol_id < info->lowest_vol_id) - info->lowest_vol_id = vol_id; - } - } - - if (!dirent && errno) { - sys_errmsg("readdir failed on \"%s\"", lib->sysfs_ubi); - goto out_close; - } - - if (closedir(sysfs_ubi)) - return sys_errmsg("closedir failed on \"%s\"", lib->sysfs_ubi); - - if (info->lowest_vol_id == INT_MAX) - info->lowest_vol_id = 0; - - if (dev_get_major(lib, dev_num, &info->major, &info->minor)) - return -1; - - if (dev_read_int(lib->dev_mtd_num, dev_num, &info->mtd_num)) - return -1; - if (dev_read_int(lib->dev_avail_ebs, dev_num, &info->avail_lebs)) - return -1; - if (dev_read_int(lib->dev_total_ebs, dev_num, &info->total_lebs)) - return -1; - if (dev_read_int(lib->dev_bad_count, dev_num, &info->bad_count)) - return -1; - if (dev_read_int(lib->dev_eb_size, dev_num, &info->leb_size)) - return -1; - if (dev_read_int(lib->dev_bad_rsvd, dev_num, &info->bad_rsvd)) - return -1; - if (dev_read_ll(lib->dev_max_ec, dev_num, &info->max_ec)) - return -1; - if (dev_read_int(lib->dev_max_vols, dev_num, &info->max_vol_count)) - return -1; - if (dev_read_int(lib->dev_min_io_size, dev_num, &info->min_io_size)) - return -1; - - info->avail_bytes = (long long)info->avail_lebs * info->leb_size; - info->total_bytes = (long long)info->total_lebs * info->leb_size; - - return 0; - -out_close: - closedir(sysfs_ubi); - return -1; -} - -int ubi_get_dev_info(libubi_t desc, const char *node, struct ubi_dev_info *info) -{ - int err, dev_num; - struct libubi *lib = (struct libubi *)desc; - - err = ubi_probe_node(desc, node); - if (err != 1) { - if (err == 2) - errno = ENODEV; - return -1; - } - - if (dev_node2num(lib, node, &dev_num)) - return -1; - - return ubi_get_dev_info1(desc, dev_num, info); -} - -int ubi_get_vol_info1(libubi_t desc, int dev_num, int vol_id, - struct ubi_vol_info *info) -{ - int ret; - struct libubi *lib = (struct libubi *)desc; - char buf[50]; - - memset(info, 0, sizeof(struct ubi_vol_info)); - info->dev_num = dev_num; - info->vol_id = vol_id; - - if (vol_get_major(lib, dev_num, vol_id, &info->major, &info->minor)) - return -1; - - ret = vol_read_data(lib->vol_type, dev_num, vol_id, buf, 50); - if (ret < 0) - return -1; - - if (strncmp(buf, "static\n", ret) == 0) - info->type = UBI_STATIC_VOLUME; - else if (strncmp(buf, "dynamic\n", ret) == 0) - info->type = UBI_DYNAMIC_VOLUME; - else { - errmsg("bad value at \"%s\"", buf); - errno = EINVAL; - return -1; - } - - ret = vol_read_int(lib->vol_alignment, dev_num, vol_id, - &info->alignment); - if (ret) - return -1; - ret = vol_read_ll(lib->vol_data_bytes, dev_num, vol_id, - &info->data_bytes); - if (ret) - return -1; - ret = vol_read_int(lib->vol_rsvd_ebs, dev_num, vol_id, &info->rsvd_lebs); - if (ret) - return -1; - ret = vol_read_int(lib->vol_eb_size, dev_num, vol_id, &info->leb_size); - if (ret) - return -1; - ret = vol_read_int(lib->vol_corrupted, dev_num, vol_id, - &info->corrupted); - if (ret) - return -1; - info->rsvd_bytes = (long long)info->leb_size * info->rsvd_lebs; - - ret = vol_read_data(lib->vol_name, dev_num, vol_id, &info->name, - UBI_VOL_NAME_MAX + 2); - if (ret < 0) - return -1; - - info->name[ret - 1] = '\0'; - return 0; -} - -int ubi_get_vol_info(libubi_t desc, const char *node, struct ubi_vol_info *info) -{ - int err, vol_id, dev_num; - struct libubi *lib = (struct libubi *)desc; - - err = ubi_probe_node(desc, node); - if (err != 2) { - if (err == 1) - errno = ENODEV; - return -1; - } - - if (vol_node2nums(lib, node, &dev_num, &vol_id)) - return -1; - - return ubi_get_vol_info1(desc, dev_num, vol_id, info); -} - -int ubi_get_vol_info1_nm(libubi_t desc, int dev_num, const char *name, - struct ubi_vol_info *info) -{ - int i, err; - unsigned int nlen = strlen(name); - struct ubi_dev_info dev_info; - - if (nlen == 0) { - errmsg("bad \"name\" input parameter"); - errno = EINVAL; - return -1; - } - - err = ubi_get_dev_info1(desc, dev_num, &dev_info); - if (err) - return err; - - for (i = dev_info.lowest_vol_id; - i <= dev_info.highest_vol_id; i++) { - err = ubi_get_vol_info1(desc, dev_num, i, info); - if (err == -1) { - if (errno == ENOENT) - continue; - return -1; - } - - if (nlen == strlen(info->name) && !strcmp(name, info->name)) - return 0; - } - - errno = ENOENT; - return -1; -} - -int ubi_set_property(int fd, uint8_t property, uint64_t value) -{ - struct ubi_set_vol_prop_req r; - - memset(&r, 0, sizeof(struct ubi_set_vol_prop_req)); - r.property = property; - r.value = value; - - return ioctl(fd, UBI_IOCSETVOLPROP, &r); -} - -int ubi_leb_unmap(int fd, int lnum) -{ - return ioctl(fd, UBI_IOCEBUNMAP, &lnum); -} - -int ubi_is_mapped(int fd, int lnum) -{ - return ioctl(fd, UBI_IOCEBISMAP, &lnum); -} |