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Diffstat (limited to 'ubi-utils/src/libubi.c')
-rw-r--r--ubi-utils/src/libubi.c1318
1 files changed, 545 insertions, 773 deletions
diff --git a/ubi-utils/src/libubi.c b/ubi-utils/src/libubi.c
index b53f18c..a028fc6 100644
--- a/ubi-utils/src/libubi.c
+++ b/ubi-utils/src/libubi.c
@@ -27,480 +27,13 @@
#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"
-/**
- * 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, 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) {
- /* 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))
- 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;
- }
-
- /* 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 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 (lstat(node, &st))
- return -1;
-
- 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;
- }
-
- *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
- *
- * 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)) {
- errno = EINVAL;
- return errmsg("\"%s\" is not a character device", node);
- }
-
- major = major(stat.st_rdev);
- minor = minor(stat.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;
-}
-
-static int mtd_num2ubi_dev(struct libubi *lib, int mtd_num, int *dev_num)
-{
- struct ubi_info info;
- int i, ret, mtd_num1;
-
- if (ubi_get_info((libubi_t *)lib, &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 = ENODEV;
- return -1;
-}
-
libubi_t libubi_open(void)
{
int fd, version;
@@ -513,130 +46,132 @@ libubi_t libubi_open(void)
/* TODO: this must be discovered instead */
lib->sysfs = strdup("/sys");
if (!lib->sysfs)
- 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;
+ goto error;
lib->sysfs_ubi = mkpath(lib->sysfs, SYSFS_UBI);
if (!lib->sysfs_ubi)
- goto out_error;
+ goto error;
/* Make sure UBI is present */
fd = open(lib->sysfs_ubi, O_RDONLY);
- if (fd == -1) {
- errmsg("cannot open \"%s\", UBI does not seem to exist in system",
- lib->sysfs_ubi);
- goto out_error;
- }
-
- if (close(fd)) {
- sys_errmsg("close failed on \"%s\"", lib->sysfs_ubi);
- goto out_error;
- }
+ if (fd == -1)
+ goto error;
+ close(fd);
lib->ubi_dev = mkpath(lib->sysfs_ubi, UBI_DEV_NAME_PATT);
if (!lib->ubi_dev)
- goto out_error;
+ goto error;
lib->ubi_version = mkpath(lib->sysfs_ubi, UBI_VER);
if (!lib->ubi_version)
- goto out_error;
+ goto error;
lib->dev_dev = mkpath(lib->ubi_dev, DEV_DEV);
if (!lib->dev_dev)
- goto out_error;
+ goto error;
lib->dev_avail_ebs = mkpath(lib->ubi_dev, DEV_AVAIL_EBS);
if (!lib->dev_avail_ebs)
- goto out_error;
+ goto error;
lib->dev_total_ebs = mkpath(lib->ubi_dev, DEV_TOTAL_EBS);
if (!lib->dev_total_ebs)
- goto out_error;
+ goto error;
lib->dev_bad_count = mkpath(lib->ubi_dev, DEV_BAD_COUNT);
if (!lib->dev_bad_count)
- goto out_error;
+ goto error;
lib->dev_eb_size = mkpath(lib->ubi_dev, DEV_EB_SIZE);
if (!lib->dev_eb_size)
- goto out_error;
+ goto error;
lib->dev_max_ec = mkpath(lib->ubi_dev, DEV_MAX_EC);
if (!lib->dev_max_ec)
- goto out_error;
+ goto error;
lib->dev_bad_rsvd = mkpath(lib->ubi_dev, DEV_MAX_RSVD);
if (!lib->dev_bad_rsvd)
- goto out_error;
+ goto error;
lib->dev_max_vols = mkpath(lib->ubi_dev, DEV_MAX_VOLS);
if (!lib->dev_max_vols)
- goto out_error;
+ goto 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;
+ goto error;
lib->ubi_vol = mkpath(lib->sysfs_ubi, UBI_VOL_NAME_PATT);
if (!lib->ubi_vol)
- goto out_error;
+ goto error;
lib->vol_type = mkpath(lib->ubi_vol, VOL_TYPE);
if (!lib->vol_type)
- goto out_error;
+ goto error;
lib->vol_dev = mkpath(lib->ubi_vol, VOL_DEV);
if (!lib->vol_dev)
- goto out_error;
+ goto error;
lib->vol_alignment = mkpath(lib->ubi_vol, VOL_ALIGNMENT);
if (!lib->vol_alignment)
- goto out_error;
+ goto error;
lib->vol_data_bytes = mkpath(lib->ubi_vol, VOL_DATA_BYTES);
if (!lib->vol_data_bytes)
- goto out_error;
+ goto error;
lib->vol_rsvd_ebs = mkpath(lib->ubi_vol, VOL_RSVD_EBS);
if (!lib->vol_rsvd_ebs)
- goto out_error;
+ goto error;
lib->vol_eb_size = mkpath(lib->ubi_vol, VOL_EB_SIZE);
if (!lib->vol_eb_size)
- goto out_error;
+ goto error;
lib->vol_corrupted = mkpath(lib->ubi_vol, VOL_CORRUPTED);
if (!lib->vol_corrupted)
- goto out_error;
+ goto error;
lib->vol_name = mkpath(lib->ubi_vol, VOL_NAME);
if (!lib->vol_name)
- goto out_error;
+ goto error;
- if (read_positive_int(lib->ubi_version, &version))
- goto out_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 out_error;
+ goto error;
}
return lib;
-out_error:
- libubi_close((libubi_t)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;
}
@@ -653,7 +188,6 @@ void libubi_close(libubi_t desc)
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);
@@ -666,141 +200,10 @@ 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_attach_mtd(libubi_t desc, const char *node,
- struct ubi_attach_request *req)
-{
- int fd, ret;
- struct ubi_attach_req r;
-
- memset(&r, sizeof(struct ubi_attach_req), '\0');
-
- desc = desc;
- r.ubi_num = req->dev_num;
- r.mtd_num = req->mtd_num;
- r.vid_hdr_offset = req->vid_hdr_offset;
-
- fd = open(node, O_RDONLY);
- if (fd == -1)
- return -1;
-
- ret = ioctl(fd, UBI_IOCATT, &r);
- close(fd);
- if (ret == -1)
- return -1;
-
- req->dev_num = r.ubi_num;
-
-#ifdef UDEV_SETTLE_HACK
- if (system("udevsettle") == -1)
- return -1;
- if (system("udevsettle") == -1)
- return -1;
-#endif
-
- 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)
- return ret;
-
- return ubi_remove_dev(desc, node, ubi_dev);
-}
-
-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 -1;
- ret = ioctl(fd, UBI_IOCDET, &ubi_dev);
- if (ret == -1)
- goto out_close;
-
-#ifdef UDEV_SETTLE_HACK
- if (system("udevsettle") == -1)
- return -1;
-#endif
-
-out_close:
- close(fd);
- return ret;
-}
-
-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)) {
- 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;
@@ -809,42 +212,20 @@ 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)) {
- /*
- * 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 sys_errmsg("cannot open %s", lib->sysfs_ubi);
+ return -1;
info->lowest_dev_num = INT_MAX;
- while (1) {
+ while ((dirent = readdir(sysfs_ubi))) {
+ char *name = &dirent->d_name[0];
int dev_num, ret;
- char tmp_buf[256];
-
- errno = 0;
- dirent = readdir(sysfs_ubi);
- if (!dirent)
- break;
-
- if (strlen(dirent->d_name) > 256) {
- errmsg("invalid entry in %s: \"%s\"",
- lib->sysfs_ubi, dirent->d_name);
- goto out_close;
- }
- ret = sscanf(dirent->d_name, UBI_DEV_NAME_PATT"%s",
- &dev_num, tmp_buf);
+ ret = sscanf(name, UBI_DEV_NAME_PATT, &dev_num);
if (ret == 1) {
info->dev_count += 1;
if (dev_num > info->highest_dev_num)
@@ -854,23 +235,15 @@ int ubi_get_info(libubi_t desc, struct ubi_info *info)
}
}
- 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;
+ if (read_int(lib->ubi_version, &info->version))
+ goto close;
- return 0;
+ return closedir(sysfs_ubi);
-out_close:
+close:
closedir(sysfs_ubi);
return -1;
}
@@ -881,8 +254,6 @@ 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;
@@ -901,17 +272,9 @@ int ubi_mkvol(libubi_t desc, const char *node, struct ubi_mkvol_request *req)
return -1;
ret = ioctl(fd, UBI_IOCMKVOL, &r);
- if (ret == -1)
- goto out_close;
-
- req->vol_id = r.vol_id;
-
-#ifdef UDEV_SETTLE_HACK
- if (system("udevsettle") == -1)
- return -1;
-#endif
+ if (!ret)
+ req->vol_id = r.vol_id;
-out_close:
close(fd);
return ret;
}
@@ -926,15 +289,6 @@ int ubi_rmvol(libubi_t desc, const char *node, int vol_id)
return -1;
ret = ioctl(fd, UBI_IOCRMVOL, &vol_id);
- if (ret == -1)
- goto out_close;
-
-#ifdef UDEV_SETTLE_HACK
- if (system("udevsettle") == -1)
- return -1;
-#endif
-
-out_close:
close(fd);
return ret;
}
@@ -965,19 +319,16 @@ int ubi_update_start(libubi_t desc, int fd, long long bytes)
return 0;
}
-int ubi_leb_change_start(libubi_t desc, int fd, int lnum, int bytes, int dtype)
+int ubi_get_dev_info(libubi_t desc, const char *node, struct ubi_dev_info *info)
{
- 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 = dtype;
+ int dev_num;
+ struct libubi *lib = (struct libubi *)desc;
- if (ioctl(fd, UBI_IOCEBCH, &req))
+ dev_num = find_dev_num(lib, node);
+ if (dev_num == -1)
return -1;
- return 0;
+
+ 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)
@@ -994,23 +345,11 @@ int ubi_get_dev_info1(libubi_t desc, int dev_num, struct ubi_dev_info *info)
return -1;
info->lowest_vol_num = INT_MAX;
-
- while (1) {
+ while ((dirent = readdir(sysfs_ubi))) {
+ char *name = &dirent->d_name[0];
int vol_id, ret, devno;
- char tmp_buf[256];
-
- errno = 0;
- dirent = readdir(sysfs_ubi);
- if (!dirent)
- break;
- if (strlen(dirent->d_name) > 256) {
- 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);
+ 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)
@@ -1020,27 +359,18 @@ int ubi_get_dev_info1(libubi_t desc, int dev_num, struct ubi_dev_info *info)
}
}
- 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);
+ closedir(sysfs_ubi);
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_lebs))
+ 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_lebs))
+ 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->leb_size))
+ 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;
@@ -1051,25 +381,26 @@ int ubi_get_dev_info1(libubi_t desc, int dev_num, struct ubi_dev_info *info)
if (dev_read_int(lib->dev_min_io_size, dev_num, &info->min_io_size))
return -1;
- info->avail_bytes = info->avail_lebs * info->leb_size;
- info->total_bytes = info->total_lebs * info->leb_size;
+ info->avail_bytes = info->avail_ebs * info->eb_size;
+ info->total_bytes = info->total_ebs * info->eb_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 ubi_get_vol_info(libubi_t desc, const char *node, struct ubi_vol_info *info)
{
- int dev_num;
+ int vol_id, dev_num;
struct libubi *lib = (struct libubi *)desc;
- if (dev_node2num(lib, node, &dev_num))
+ dev_num = find_dev_num_vol(lib, node);
+ if (dev_num == -1)
return -1;
- return ubi_get_dev_info1(desc, dev_num, info);
+ 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,
@@ -1083,21 +414,16 @@ int ubi_get_vol_info1(libubi_t desc, int dev_num, int vol_id,
info->dev_num = dev_num;
info->vol_id = vol_id;
- 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);
+ ret = vol_read_data(lib->vol_type, dev_num, vol_id, &buf[0], 50);
if (ret < 0)
return -1;
- if (strncmp(buf, "static\n", ret) == 0)
+ if (strncmp(&buf[0], "static\n", ret) == 0)
info->type = UBI_STATIC_VOLUME;
- else if (strncmp(buf, "dynamic\n", ret) == 0)
+ else if (strncmp(&buf[0], "dynamic\n", ret) == 0)
info->type = UBI_DYNAMIC_VOLUME;
else {
- errmsg("bad value at \"%s\"", buf);
+ fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
errno = EINVAL;
return -1;
}
@@ -1110,17 +436,17 @@ int ubi_get_vol_info1(libubi_t desc, int dev_num, int vol_id,
&info->data_bytes);
if (ret)
return -1;
- ret = vol_read_int(lib->vol_rsvd_ebs, dev_num, vol_id, &info->rsvd_lebs);
+ 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->leb_size);
+ 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->leb_size * info->rsvd_lebs;
+ 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);
@@ -1131,13 +457,459 @@ int ubi_get_vol_info1(libubi_t desc, int dev_num, int vol_id,
return 0;
}
-int ubi_get_vol_info(libubi_t desc, const char *node, struct ubi_vol_info *info)
+/**
+ * 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 vol_id, dev_num;
- struct libubi *lib = (struct libubi *)desc;
+ int fd, rd;
+ char buf[50];
- if (vol_node2nums(lib, node, &dev_num, &vol_id))
+ fd = open(file, O_RDONLY);
+ if (fd == -1)
return -1;
- return ubi_get_vol_info1(desc, dev_num, vol_id, info);
+ 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)
+{
+ 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;
+ }
+
+ 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 2024-11-11 12:27:23 +0000