summaryrefslogtreecommitdiff
path: root/ubi-utils/old-utils/src/libubi.c
diff options
context:
space:
mode:
Diffstat (limited to 'ubi-utils/old-utils/src/libubi.c')
-rw-r--r--ubi-utils/old-utils/src/libubi.c915
1 files changed, 915 insertions, 0 deletions
diff --git a/ubi-utils/old-utils/src/libubi.c b/ubi-utils/old-utils/src/libubi.c
new file mode 100644
index 0000000..a536b47
--- /dev/null
+++ b/ubi-utils/old-utils/src/libubi.c
@@ -0,0 +1,915 @@
+/*
+ * 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 B. Bityutskiy
+ *
+ * UBI (Unsorted Block Images) library.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <limits.h>
+#include "libubi.h"
+#include "libubi_int.h"
+
+libubi_t libubi_open(void)
+{
+ int fd, version;
+ struct libubi *lib;
+
+ lib = calloc(1, sizeof(struct libubi));
+ if (!lib)
+ return NULL;
+
+ /* TODO: this must be discovered instead */
+ lib->sysfs = strdup("/sys");
+ if (!lib->sysfs)
+ goto error;
+
+ lib->sysfs_ubi = mkpath(lib->sysfs, SYSFS_UBI);
+ if (!lib->sysfs_ubi)
+ goto error;
+
+ /* Make sure UBI is present */
+ fd = open(lib->sysfs_ubi, O_RDONLY);
+ if (fd == -1)
+ goto error;
+ close(fd);
+
+ lib->ubi_dev = mkpath(lib->sysfs_ubi, UBI_DEV_NAME_PATT);
+ if (!lib->ubi_dev)
+ goto error;
+
+ lib->ubi_version = mkpath(lib->sysfs_ubi, UBI_VER);
+ if (!lib->ubi_version)
+ goto error;
+
+ lib->dev_dev = mkpath(lib->ubi_dev, DEV_DEV);
+ if (!lib->dev_dev)
+ goto error;
+
+ lib->dev_avail_ebs = mkpath(lib->ubi_dev, DEV_AVAIL_EBS);
+ if (!lib->dev_avail_ebs)
+ goto error;
+
+ lib->dev_total_ebs = mkpath(lib->ubi_dev, DEV_TOTAL_EBS);
+ if (!lib->dev_total_ebs)
+ goto error;
+
+ lib->dev_bad_count = mkpath(lib->ubi_dev, DEV_BAD_COUNT);
+ if (!lib->dev_bad_count)
+ goto error;
+
+ lib->dev_eb_size = mkpath(lib->ubi_dev, DEV_EB_SIZE);
+ if (!lib->dev_eb_size)
+ goto error;
+
+ lib->dev_max_ec = mkpath(lib->ubi_dev, DEV_MAX_EC);
+ if (!lib->dev_max_ec)
+ goto error;
+
+ lib->dev_bad_rsvd = mkpath(lib->ubi_dev, DEV_MAX_RSVD);
+ if (!lib->dev_bad_rsvd)
+ goto error;
+
+ lib->dev_max_vols = mkpath(lib->ubi_dev, DEV_MAX_VOLS);
+ if (!lib->dev_max_vols)
+ goto error;
+
+ lib->dev_min_io_size = mkpath(lib->ubi_dev, DEV_MIN_IO_SIZE);
+ if (!lib->dev_min_io_size)
+ goto error;
+
+ lib->ubi_vol = mkpath(lib->sysfs_ubi, UBI_VOL_NAME_PATT);
+ if (!lib->ubi_vol)
+ goto error;
+
+ lib->vol_type = mkpath(lib->ubi_vol, VOL_TYPE);
+ if (!lib->vol_type)
+ goto error;
+
+ lib->vol_dev = mkpath(lib->ubi_vol, VOL_DEV);
+ if (!lib->vol_dev)
+ goto error;
+
+ lib->vol_alignment = mkpath(lib->ubi_vol, VOL_ALIGNMENT);
+ if (!lib->vol_alignment)
+ goto error;
+
+ lib->vol_data_bytes = mkpath(lib->ubi_vol, VOL_DATA_BYTES);
+ if (!lib->vol_data_bytes)
+ goto error;
+
+ lib->vol_rsvd_ebs = mkpath(lib->ubi_vol, VOL_RSVD_EBS);
+ if (!lib->vol_rsvd_ebs)
+ goto error;
+
+ lib->vol_eb_size = mkpath(lib->ubi_vol, VOL_EB_SIZE);
+ if (!lib->vol_eb_size)
+ goto error;
+
+ lib->vol_corrupted = mkpath(lib->ubi_vol, VOL_CORRUPTED);
+ if (!lib->vol_corrupted)
+ goto error;
+
+ lib->vol_name = mkpath(lib->ubi_vol, VOL_NAME);
+ if (!lib->vol_name)
+ goto error;
+
+ if (read_int(lib->ubi_version, &version))
+ goto error;
+ if (version != LIBUBI_UBI_VERSION) {
+ fprintf(stderr, "LIBUBI: this library was made for UBI version "
+ "%d, but UBI version %d is detected\n",
+ LIBUBI_UBI_VERSION, version);
+ goto error;
+ }
+
+ return lib;
+
+error:
+ 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_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->sysfs);
+ free(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_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->sysfs);
+ free(lib);
+}
+
+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));
+
+ /*
+ * 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 ((dirent = readdir(sysfs_ubi))) {
+ char *name = &dirent->d_name[0];
+ int dev_num, ret;
+
+ ret = sscanf(name, UBI_DEV_NAME_PATT, &dev_num);
+ 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 (info->lowest_dev_num == INT_MAX)
+ info->lowest_dev_num = 0;
+
+ if (read_int(lib->ubi_version, &info->version))
+ goto close;
+
+ return closedir(sysfs_ubi);
+
+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;
+
+ 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;
+
+ fd = open(node, O_RDONLY);
+ if (fd == -1)
+ return -1;
+
+ ret = ioctl(fd, UBI_IOCMKVOL, &r);
+ if (!ret)
+ req->vol_id = r.vol_id;
+
+ close(fd);
+ return ret;
+}
+
+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 -1;
+
+ ret = ioctl(fd, UBI_IOCRMVOL, &vol_id);
+ close(fd);
+ return ret;
+}
+
+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 -1;
+
+ req.bytes = bytes;
+ req.vol_id = vol_id;
+
+ ret = ioctl(fd, UBI_IOCRSVOL, &req);
+ close(fd);
+ return ret;
+}
+
+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_get_dev_info(libubi_t desc, const char *node, struct ubi_dev_info *info)
+{
+ int dev_num;
+ struct libubi *lib = (struct libubi *)desc;
+
+ dev_num = find_dev_num(lib, node);
+ if (dev_num == -1)
+ return -1;
+
+ return ubi_get_dev_info1(desc, dev_num, info);
+}
+
+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;
+
+ sysfs_ubi = opendir(lib->sysfs_ubi);
+ if (!sysfs_ubi)
+ return -1;
+
+ info->lowest_vol_num = INT_MAX;
+ while ((dirent = readdir(sysfs_ubi))) {
+ char *name = &dirent->d_name[0];
+ int vol_id, ret, devno;
+
+ ret = sscanf(name, UBI_VOL_NAME_PATT, &devno, &vol_id);
+ if (ret == 2 && devno == dev_num) {
+ info->vol_count += 1;
+ if (vol_id > info->highest_vol_num)
+ info->highest_vol_num = vol_id;
+ if (vol_id < info->lowest_vol_num)
+ info->lowest_vol_num = vol_id;
+ }
+ }
+
+ closedir(sysfs_ubi);
+
+ if (info->lowest_vol_num == INT_MAX)
+ info->lowest_vol_num = 0;
+
+ if (dev_read_int(lib->dev_avail_ebs, dev_num, &info->avail_ebs))
+ return -1;
+ if (dev_read_int(lib->dev_total_ebs, dev_num, &info->total_ebs))
+ 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->eb_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 = info->avail_ebs * info->eb_size;
+ info->total_bytes = info->total_ebs * info->eb_size;
+
+ return 0;
+}
+
+int ubi_get_vol_info(libubi_t desc, const char *node, struct ubi_vol_info *info)
+{
+ int vol_id, dev_num;
+ struct libubi *lib = (struct libubi *)desc;
+
+ dev_num = find_dev_num_vol(lib, node);
+ if (dev_num == -1)
+ return -1;
+
+ vol_id = find_vol_num(lib, dev_num, node);
+ if (vol_id == -1)
+ return -1;
+
+ return ubi_get_vol_info1(desc, dev_num, vol_id, 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;
+
+ ret = vol_read_data(lib->vol_type, dev_num, vol_id, &buf[0], 50);
+ if (ret < 0)
+ return -1;
+
+ if (strncmp(&buf[0], "static\n", ret) == 0)
+ info->type = UBI_STATIC_VOLUME;
+ else if (strncmp(&buf[0], "dynamic\n", ret) == 0)
+ info->type = UBI_DYNAMIC_VOLUME;
+ else {
+ fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
+ 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_ebs);
+ if (ret)
+ return -1;
+ ret = vol_read_int(lib->vol_eb_size, dev_num, vol_id, &info->eb_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 = info->eb_size * info->rsvd_ebs;
+
+ 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;
+}
+
+/**
+ * read_int - read an 'int' value from a file.
+ *
+ * @file the file to read from
+ * @value the result is stored here
+ *
+ * This function returns %0 in case of success and %-1 in case of failure.
+ */
+static int read_int(const char *file, int *value)
+{
+ int fd, rd;
+ char buf[50];
+
+ fd = open(file, O_RDONLY);
+ if (fd == -1)
+ return -1;
+
+ rd = read(fd, &buf[0], 50);
+ if (rd == -1)
+ goto error;
+
+ if (sscanf(&buf[0], "%d\n", value) != 1) {
+ /* This must be a UBI bug */
+ fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
+ errno = EINVAL;
+ goto error;
+ }
+
+ close(fd);
+ return 0;
+
+error:
+ close(fd);
+ return -1;
+}
+
+/**
+ * dev_read_int - read an 'int' value from an UBI device's sysfs file.
+ *
+ * @patt the 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)
+{
+ int fd, rd;
+ char buf[50];
+ char file[strlen(patt) + 50];
+
+ sprintf(&file[0], patt, dev_num);
+ fd = open(&file[0], O_RDONLY);
+ if (fd == -1)
+ return -1;
+
+ rd = read(fd, &buf[0], 50);
+ if (rd == -1)
+ goto error;
+
+ if (sscanf(&buf[0], "%d\n", value) != 1) {
+ /* This must be a UBI bug */
+ fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
+ errno = EINVAL;
+ goto error;
+ }
+
+ close(fd);
+ return 0;
+
+error:
+ close(fd);
+ return -1;
+}
+
+/**
+ * dev_read_ll - read a 'long long' value from an UBI device's sysfs file.
+ *
+ * @patt the 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)
+{
+ int fd, rd;
+ char buf[50];
+ char file[strlen(patt) + 50];
+
+ sprintf(&file[0], patt, dev_num);
+ fd = open(&file[0], O_RDONLY);
+ if (fd == -1)
+ return -1;
+
+ rd = read(fd, &buf[0], 50);
+ if (rd == -1)
+ goto error;
+
+ if (sscanf(&buf[0], "%lld\n", value) != 1) {
+ /* This must be a UBI bug */
+ fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
+ errno = EINVAL;
+ goto error;
+ }
+
+ close(fd);
+ return 0;
+
+error:
+ close(fd);
+ return -1;
+}
+
+/**
+ * dev_read_data - read data from an UBI device's sysfs file.
+ *
+ * @patt the file pattern to read from
+ * @dev_num UBI device number
+ * @buf buffer to read data 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 dev_num, void *buf, int buf_len)
+{
+ int fd, rd;
+ char file[strlen(patt) + 50];
+
+ sprintf(&file[0], patt, dev_num);
+ fd = open(&file[0], O_RDONLY);
+ if (fd == -1)
+ return -1;
+
+ rd = read(fd, buf, buf_len);
+ if (rd == -1) {
+ close(fd);
+ return -1;
+ }
+
+ close(fd);
+ return rd;
+}
+
+/**
+ * vol_read_int - read an 'int' value from an UBI volume's sysfs file.
+ *
+ * @patt the file pattern to read from
+ * @dev_num UBI device number
+ * @vol_id volume identifier
+ * @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)
+{
+ int fd, rd;
+ char buf[50];
+ char file[strlen(patt) + 100];
+
+ sprintf(&file[0], patt, dev_num, vol_id);
+ fd = open(&file[0], O_RDONLY);
+ if (fd == -1)
+ return -1;
+
+ rd = read(fd, &buf[0], 50);
+ if (rd == -1)
+ goto error;
+
+ if (sscanf(&buf[0], "%d\n", value) != 1) {
+ /* This must be a UBI bug */
+ fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
+ errno = EINVAL;
+ goto error;
+ }
+
+ close(fd);
+ return 0;
+
+error:
+ close(fd);
+ return -1;
+}
+
+/**
+ * vol_read_ll - read a 'long long' value from an UBI volume's sysfs file.
+ *
+ * @patt the file pattern to read from
+ * @dev_num UBI device number
+ * @vol_id volume identifier
+ * @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)
+{
+ int fd, rd;
+ char buf[50];
+ char file[strlen(patt) + 100];
+
+ sprintf(&file[0], patt, dev_num, vol_id);
+ fd = open(&file[0], O_RDONLY);
+ if (fd == -1)
+ return -1;
+
+ rd = read(fd, &buf[0], 50);
+ if (rd == -1)
+ goto error;
+
+ if (sscanf(&buf[0], "%lld\n", value) != 1) {
+ /* This must be a UBI bug */
+ fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
+ errno = EINVAL;
+ goto error;
+ }
+
+ close(fd);
+ return 0;
+
+error:
+ close(fd);
+ return -1;
+}
+
+/**
+ * vol_read_data - read data from an UBI volume's sysfs file.
+ *
+ * @patt the file pattern to read from
+ * @dev_num UBI device number
+ * @vol_id volume identifier
+ * @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)
+{
+ int fd, rd;
+ char file[strlen(patt) + 100];
+
+ sprintf(&file[0], patt, dev_num, vol_id);
+ fd = open(&file[0], O_RDONLY);
+ if (fd == -1)
+ return -1;
+
+ rd = read(fd, buf, buf_len);
+ if (rd == -1) {
+ close(fd);
+ return -1;
+ }
+
+ close(fd);
+ return rd;
+}
+
+/**
+ * mkpath - compose full path from 2 given components.
+ *
+ * @path first component
+ * @name 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)
+ return NULL;
+
+ memcpy(n, path, len1);
+ if (n[len1 - 1] != '/')
+ n[len1++] = '/';
+
+ memcpy(n + len1, name, len2 + 1);
+ return n;
+}
+
+/**
+ * find_dev_num - find UBI device number by its character device node.
+ *
+ * @lib UBI library descriptor
+ * @node UBI character device node name
+ *
+ * This function returns positive UBI device number in case of success and %-1
+ * in case of failure.
+ */
+static int find_dev_num(struct libubi *lib, const char *node)
+{
+ struct stat st;
+ struct ubi_info info;
+ int i, major, minor;
+
+ if (stat(node, &st))
+ return -1;
+
+ if (!S_ISCHR(st.st_mode)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ major = major(st.st_rdev);
+ minor = minor(st.st_rdev);
+
+ if (minor != 0) {
+ errno = -EINVAL;
+ return -1;
+ }
+
+ 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;
+ char buf[50];
+
+ ret = dev_read_data(lib->dev_dev, i, &buf[0], 50);
+ if (ret < 0)
+ return -1;
+
+ ret = sscanf(&buf[0], "%d:%d\n", &major1, &minor1);
+ if (ret != 2) {
+ fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (minor1 == minor && major1 == major)
+ return i;
+ }
+
+ errno = ENOENT;
+ return -1;
+}
+
+/**
+ * find_dev_num_vol - find UBI device number by volume character device node.
+ *
+ * @lib UBI library descriptor
+ * @node UBI character device node name
+ *
+ * This function returns positive UBI device number in case of success and %-1
+ * in case of failure.
+ */
+static int find_dev_num_vol(struct libubi *lib, const char *node)
+{
+ struct stat st;
+ struct ubi_info info;
+ int i, major;
+
+ if (stat(node, &st))
+ return -1;
+
+ if (!S_ISCHR(st.st_mode)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ major = major(st.st_rdev);
+
+ if (minor(st.st_rdev) == 0) {
+ errno = -EINVAL;
+ return -1;
+ }
+
+ 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;
+ char buf[50];
+
+ ret = dev_read_data(lib->dev_dev, i, &buf[0], 50);
+ if (ret < 0)
+ return -1;
+
+ ret = sscanf(&buf[0], "%d:%d\n", &major1, &minor1);
+ if (ret != 2) {
+ fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (major1 == major)
+ return i;
+ }
+
+ errno = ENOENT;
+ return -1;
+}
+
+/**
+ * find_vol_num - find UBI volume number by its character device node.
+ *
+ * @lib UBI library descriptor
+ * @dev_num UBI device number
+ * @node UBI volume character device node name
+ *
+ * This function returns positive UBI volume number in case of success and %-1
+ * in case of failure.
+ */
+static int find_vol_num(struct libubi *lib, int dev_num, const char *node)
+{
+ struct stat st;
+ struct ubi_dev_info info;
+ int i, major, minor;
+
+ if (stat(node, &st))
+ return -1;
+
+ if (!S_ISCHR(st.st_mode)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ major = major(st.st_rdev);
+ minor = minor(st.st_rdev);
+
+ if (minor == 0) {
+ errno = -EINVAL;
+ return -1;
+ }
+
+ if (ubi_get_dev_info1((libubi_t *)lib, dev_num, &info))
+ return -1;
+
+ for (i = info.lowest_vol_num; i <= info.highest_vol_num; i++) {
+ int major1, minor1, ret;
+ char buf[50];
+
+ ret = vol_read_data(lib->vol_dev, dev_num, i, &buf[0], 50);
+ if (ret < 0)
+ return -1;
+
+ ret = sscanf(&buf[0], "%d:%d\n", &major1, &minor1);
+ if (ret != 2) {
+ fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (minor1 == minor && major1 == major)
+ return i;
+ }
+
+ errno = ENOENT;
+ return -1;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 19:23:25 +0000