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Diffstat (limited to 'ubi-utils/src/libubi.c')
-rw-r--r--ubi-utils/src/libubi.c1200
1 files changed, 661 insertions, 539 deletions
diff --git a/ubi-utils/src/libubi.c b/ubi-utils/src/libubi.c
index 4d2b725..ecc12b4 100644
--- a/ubi-utils/src/libubi.c
+++ b/ubi-utils/src/libubi.c
@@ -34,6 +34,484 @@
#include "libubi.h"
#include "libubi_int.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) {
+ errmsg("cannot allocate %d bytes", len1 + len2 + 2);
+ perror("malloc");
+ 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, 50);
+ if (rd == -1) {
+ errmsg("cannot read \"%s\"", file);
+ perror("read");
+ 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) {
+ /* This must be a UBI bug */
+ 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)) {
+ errmsg("close failed on \"%s\"", file);
+ perror("close");
+ return -1;
+ }
+
+ 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) {
+ errmsg("cannot read \"%s\"", file);
+ perror("read");
+ goto out_error;
+ }
+
+ /* Make sure all data is read */
+ tmp1 = read(fd, &tmp, 1);
+ if (tmp1 == 1) {
+ errmsg("cannot read \"%s\"", file);
+ perror("read");
+ 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)) {
+ errmsg("close failed on \"%s\"", file);
+ perror("close");
+ 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 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) {
+ errmsg("\"%s\" does not have major:minor format", file);
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (*major < 0 || *minor < 0) {
+ errmsg("bad major:minor %d:%d in \"%s\"",
+ *major, *minor, file);
+ errno = EINVAL;
+ return -1;
+ }
+
+ 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);
+}
+
+/**
+ * dent_is_dir - check if a file is a directory.
+ * @dir: the base directory path of the file
+ * @name: file name
+ *
+ * This function returns %1 if file @name in directory @dir is a directoru, and
+ * %0 if not.
+ */
+static int dent_is_dir(const char *dir, const char *name)
+{
+ int ret;
+ struct stat st;
+ char full_path[strlen(dir) + strlen(name) + 2];
+
+ sprintf(full_path, "%s/%s", dir, name);
+ ret = lstat(full_path, &st);
+ if (ret) {
+ errmsg("lstat failed on \"%s\"", full_path);
+ perror("lstat");
+ return -1;
+ }
+
+ return !!S_ISDIR(st.st_mode);
+}
+
+/**
+ * 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 (lstat(node, &st))
+ return -1;
+
+ 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 (minor == 0) {
+ errmsg("\"%s\" is not a volume character device", node);
+ 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;
+
+ 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 = ENOENT;
+ 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 = ENOENT;
+ return -1;
+ }
+
+ *dev_num = i;
+ *vol_id = minor - 1;
+ return 0;
+}
+
+/**
+ * dev_node2num - 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 dev_node2num(struct libubi *lib, const char *node, int *dev_num)
+{
+ struct stat stat;
+ struct ubi_info info;
+ int i, major, minor;
+
+ if (lstat(node, &stat))
+ return -1;
+
+ if (!S_ISCHR(stat.st_mode)) {
+ errmsg("\"%s\" is not a character device", node);
+ errno = EINVAL;
+ return -1;
+ }
+
+ major = major(stat.st_rdev);
+ minor = minor(stat.st_rdev);
+
+ if (minor != 0) {
+ errmsg("\"%s\" is not an UBI character device", node);
+ 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;
+
+ 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;
+ }
+ *dev_num = i;
+ return 0;
+ }
+ }
+
+ errno = ENOENT;
+ return -1;
+}
+
libubi_t libubi_open(void)
{
int fd, version;
@@ -46,132 +524,127 @@ libubi_t libubi_open(void)
/* TODO: this must be discovered instead */
lib->sysfs = strdup("/sys");
if (!lib->sysfs)
- goto error;
+ goto out_error;
+
+ lib->sysfs_ctrl = mkpath(lib->sysfs, 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(lib->sysfs, SYSFS_UBI);
if (!lib->sysfs_ubi)
- goto error;
+ goto out_error;
/* Make sure UBI is present */
fd = open(lib->sysfs_ubi, O_RDONLY);
- if (fd == -1)
- goto error;
- close(fd);
+ if (fd == -1) {
+ errmsg("cannot open \"%s\", UBI does not seem to exist in system",
+ lib->sysfs_ubi);
+ goto out_error;
+ }
+
+ if (close(fd)) {
+ errmsg("close failed on \"%s\"", lib->sysfs_ubi);
+ perror("close");
+ goto out_error;
+ }
lib->ubi_dev = mkpath(lib->sysfs_ubi, UBI_DEV_NAME_PATT);
if (!lib->ubi_dev)
- goto error;
+ goto out_error;
lib->ubi_version = mkpath(lib->sysfs_ubi, UBI_VER);
if (!lib->ubi_version)
- goto error;
+ goto out_error;
lib->dev_dev = mkpath(lib->ubi_dev, DEV_DEV);
if (!lib->dev_dev)
- goto error;
+ goto out_error;
lib->dev_avail_ebs = mkpath(lib->ubi_dev, DEV_AVAIL_EBS);
if (!lib->dev_avail_ebs)
- goto error;
+ goto out_error;
lib->dev_total_ebs = mkpath(lib->ubi_dev, DEV_TOTAL_EBS);
if (!lib->dev_total_ebs)
- goto error;
+ goto out_error;
lib->dev_bad_count = mkpath(lib->ubi_dev, DEV_BAD_COUNT);
if (!lib->dev_bad_count)
- goto error;
+ goto out_error;
lib->dev_eb_size = mkpath(lib->ubi_dev, DEV_EB_SIZE);
if (!lib->dev_eb_size)
- goto error;
+ goto out_error;
lib->dev_max_ec = mkpath(lib->ubi_dev, DEV_MAX_EC);
if (!lib->dev_max_ec)
- goto error;
+ goto out_error;
lib->dev_bad_rsvd = mkpath(lib->ubi_dev, DEV_MAX_RSVD);
if (!lib->dev_bad_rsvd)
- goto error;
+ goto out_error;
lib->dev_max_vols = mkpath(lib->ubi_dev, DEV_MAX_VOLS);
if (!lib->dev_max_vols)
- goto error;
+ goto out_error;
lib->dev_min_io_size = mkpath(lib->ubi_dev, DEV_MIN_IO_SIZE);
if (!lib->dev_min_io_size)
- goto error;
+ goto out_error;
lib->ubi_vol = mkpath(lib->sysfs_ubi, UBI_VOL_NAME_PATT);
if (!lib->ubi_vol)
- goto error;
+ goto out_error;
lib->vol_type = mkpath(lib->ubi_vol, VOL_TYPE);
if (!lib->vol_type)
- goto error;
+ goto out_error;
lib->vol_dev = mkpath(lib->ubi_vol, VOL_DEV);
if (!lib->vol_dev)
- goto error;
+ goto out_error;
lib->vol_alignment = mkpath(lib->ubi_vol, VOL_ALIGNMENT);
if (!lib->vol_alignment)
- goto error;
+ goto out_error;
lib->vol_data_bytes = mkpath(lib->ubi_vol, VOL_DATA_BYTES);
if (!lib->vol_data_bytes)
- goto error;
+ goto out_error;
lib->vol_rsvd_ebs = mkpath(lib->ubi_vol, VOL_RSVD_EBS);
if (!lib->vol_rsvd_ebs)
- goto error;
+ goto out_error;
lib->vol_eb_size = mkpath(lib->ubi_vol, VOL_EB_SIZE);
if (!lib->vol_eb_size)
- goto error;
+ goto out_error;
lib->vol_corrupted = mkpath(lib->ubi_vol, VOL_CORRUPTED);
if (!lib->vol_corrupted)
- goto error;
+ goto out_error;
lib->vol_name = mkpath(lib->ubi_vol, VOL_NAME);
if (!lib->vol_name)
- goto error;
+ goto out_error;
- if (read_int(lib->ubi_version, &version))
- goto error;
+ if (read_positive_int(lib->ubi_version, &version))
+ goto out_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;
+ goto out_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);
+out_error:
+ libubi_close((libubi_t)lib);
return NULL;
}
@@ -200,10 +673,74 @@ void libubi_close(libubi_t desc)
free(lib->ubi_version);
free(lib->ubi_dev);
free(lib->sysfs_ubi);
+ free(lib->ctrl_dev);
+ free(lib->sysfs_ctrl);
free(lib->sysfs);
free(lib);
}
+int ubi_node_type(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 (lstat(node, &st))
+ return -1;
+
+ 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;
+ return -1;
+ }
+
+ if (major1 == major)
+ break;
+ }
+
+ if (i > info.highest_dev_num) {
+ /*
+ * The character device node does not correspond to any
+ * existing UBI device or volume, but we do not want to return
+ * any error number in this case, to indicate the fact that it
+ * could be a UBI device/volume, but it doesn't.
+ */
+ errno = 0;
+ return -1;
+ }
+
+ 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) {
+ errno = 0;
+ return -1;
+ }
+
+ return 2;
+}
+
int ubi_get_info(libubi_t desc, struct ubi_info *info)
{
DIR *sysfs_ubi;
@@ -212,20 +749,33 @@ int ubi_get_info(libubi_t desc, struct ubi_info *info)
memset(info, '\0', sizeof(struct ubi_info));
+ if (read_major(lib->ctrl_dev, &info->ctrl_major, &info->ctrl_minor))
+ return -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)
+ if (!sysfs_ubi) {
+ errmsg("cannot open %s", lib->sysfs_ubi);
+ perror("opendir");
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);
+ /*
+ * Make sure this direntry is a directory and not a symlink -
+ * Linux puts symlinks to UBI volumes on this UBI device to the
+ * same sysfs directory.
+ */
+ if (!dent_is_dir(lib->sysfs_ubi, dirent->d_name))
+ continue;
+
+ ret = sscanf(dirent->d_name, UBI_DEV_NAME_PATT, &dev_num);
if (ret == 1) {
info->dev_count += 1;
if (dev_num > info->highest_dev_num)
@@ -235,15 +785,27 @@ int ubi_get_info(libubi_t desc, struct ubi_info *info)
}
}
+ if (!dirent && errno) {
+ errmsg("readdir failed on \"%s\"", lib->sysfs_ubi);
+ perror("readdir");
+ goto out_close;
+ }
+
+ if (closedir(sysfs_ubi)) {
+ errmsg("closedir failed on \"%s\"", lib->sysfs_ubi);
+ perror("closedir");
+ return -1;
+ }
+
if (info->lowest_dev_num == INT_MAX)
info->lowest_dev_num = 0;
- if (read_int(lib->ubi_version, &info->version))
- goto close;
+ if (read_positive_int(lib->ubi_version, &info->version))
+ return -1;
- return closedir(sysfs_ubi);
+ return 0;
-close:
+out_close:
closedir(sysfs_ubi);
return -1;
}
@@ -254,6 +816,8 @@ int ubi_mkvol(libubi_t desc, const char *node, struct ubi_mkvol_request *req)
struct ubi_mkvol_req r;
size_t n;
+ memset(&r, sizeof(struct ubi_mkvol_req), '\0');
+
desc = desc;
r.vol_id = req->vol_id;
r.alignment = req->alignment;
@@ -272,7 +836,7 @@ int ubi_mkvol(libubi_t desc, const char *node, struct ubi_mkvol_request *req)
return -1;
ret = ioctl(fd, UBI_IOCMKVOL, &r);
- if (!ret)
+ if (ret == 0)
req->vol_id = r.vol_id;
close(fd);
@@ -310,7 +874,7 @@ 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;
+ desc = desc;
fd = open(node, O_RDONLY);
if (fd == -1)
return -1;
@@ -331,18 +895,6 @@ int ubi_update_start(libubi_t desc, int fd, long long bytes)
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;
@@ -358,10 +910,9 @@ int ubi_get_dev_info1(libubi_t desc, int dev_num, struct ubi_dev_info *info)
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);
+ ret = sscanf(dirent->d_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)
@@ -371,11 +922,24 @@ int ubi_get_dev_info1(libubi_t desc, int dev_num, struct ubi_dev_info *info)
}
}
- closedir(sysfs_ubi);
+ if (!dirent && errno) {
+ errmsg("readdir failed on \"%s\"", lib->sysfs_ubi);
+ perror("readdir");
+ goto out_close;
+ }
+
+ if (closedir(sysfs_ubi)) {
+ errmsg("closedir failed on \"%s\"", lib->sysfs_ubi);
+ perror("closedir");
+ return -1;
+ }
if (info->lowest_vol_num == INT_MAX)
info->lowest_vol_num = 0;
+ if (dev_get_major(lib, dev_num, &info->major, &info->minor))
+ return -1;
+
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))
@@ -397,22 +961,21 @@ int ubi_get_dev_info1(libubi_t desc, int dev_num, struct ubi_dev_info *info)
info->total_bytes = info->total_ebs * info->eb_size;
return 0;
+
+out_close:
+ closedir(sysfs_ubi);
+ return -1;
}
-int ubi_get_vol_info(libubi_t desc, const char *node, struct ubi_vol_info *info)
+int ubi_get_dev_info(libubi_t desc, const char *node, struct ubi_dev_info *info)
{
- int vol_id, dev_num;
+ int dev_num;
struct libubi *lib = (struct libubi *)desc;
- dev_num = find_dev_num_vol(lib, node);
- if (dev_num == -1)
+ if (dev_node2num(lib, node, &dev_num))
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);
+ return ubi_get_dev_info1(desc, dev_num, info);
}
int ubi_get_vol_info1(libubi_t desc, int dev_num, int vol_id,
@@ -426,16 +989,21 @@ int ubi_get_vol_info1(libubi_t desc, int dev_num, int vol_id,
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 (dev_get_major(lib, dev_num, &info->dev_major, &info->dev_minor))
+ return -1;
+ 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[0], "static\n", ret) == 0)
+ if (strncmp(buf, "static\n", ret) == 0)
info->type = UBI_STATIC_VOLUME;
- else if (strncmp(&buf[0], "dynamic\n", ret) == 0)
+ else if (strncmp(buf, "dynamic\n", ret) == 0)
info->type = UBI_DYNAMIC_VOLUME;
else {
- fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
+ errmsg("bad value at \"%s\"", buf);
errno = EINVAL;
return -1;
}
@@ -469,459 +1037,13 @@ int ubi_get_vol_info1(libubi_t desc, int dev_num, int vol_id,
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 stat;
- struct ubi_info info;
- int i, major, minor;
-
- if (lstat(node, &stat))
- return -1;
-
- if (!S_ISCHR(stat.st_mode)) {
- errno = EINVAL;
- return -1;
- }
-
- major = major(stat.st_rdev);
- minor = minor(stat.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 stat;
- struct ubi_info info;
- int i, major;
-
- if (lstat(node, &stat))
- return -1;
-
- if (!S_ISCHR(stat.st_mode)) {
- errno = EINVAL;
- return -1;
- }
-
- major = major(stat.st_rdev);
-
- if (minor(stat.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)
+int ubi_get_vol_info(libubi_t desc, const char *node, struct ubi_vol_info *info)
{
- struct stat stat;
- struct ubi_dev_info info;
- int i, major, minor;
-
- if (lstat(node, &stat))
- return -1;
-
- if (!S_ISCHR(stat.st_mode)) {
- errno = EINVAL;
- return -1;
- }
-
- major = major(stat.st_rdev);
- minor = minor(stat.st_rdev);
-
- if (minor == 0) {
- errno = -EINVAL;
- return -1;
- }
+ int vol_id, dev_num;
+ struct libubi *lib = (struct libubi *)desc;
- if (ubi_get_dev_info1((libubi_t *)lib, dev_num, &info))
+ if (vol_node2nums(lib, node, &dev_num, &vol_id))
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;
+ return ubi_get_vol_info1(desc, dev_num, vol_id, info);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 07:59:22 +0000