#include <sys/types.h>
#include "utils_dm.h"
+/* These are DM helpers used only by this file */
+int dm_is_dm_device(int major, int minor);
+int dm_is_dm_kernel_name(const char *name);
+char *dm_device_path(const char *prefix, int major, int minor);
+
char *crypt_lookup_dev(const char *dev_id);
-int crypt_sysfs_check_crypt_segment(const char *device, uint64_t offset, uint64_t size);
int crypt_sysfs_get_rotational(int major, int minor, int *rotational);
static char *__lookup_dev(char *path, dev_t dev, int dir_level, const int max_level)
if (snprintf(path, sizeof(path), "/sys/dev/block/%s", dev_id) < 0)
return NULL;
- len = readlink(path, link, sizeof(link));
+ len = readlink(path, link, sizeof(link) - 1);
if (len < 0) {
/* Without /sys use old scan */
if (stat("/sys/dev/block", &st) < 0)
return devpath;
}
-static int crypt_sysfs_get_major_minor(const char *kname, int *major, int *minor)
-{
- char path[PATH_MAX], tmp[64] = {0};
- int fd, r = 0;
-
- if (snprintf(path, sizeof(path), "/sys/block/%s/dev", kname) < 0)
- return 0;
-
- if ((fd = open(path, O_RDONLY)) < 0)
- return 0;
- r = read(fd, tmp, sizeof(tmp));
- close(fd);
-
- if (r <= 0)
- return 0;
-
- tmp[63] = '\0';
- if (sscanf(tmp, "%d:%d", major, minor) != 2)
- return 0;
-
- return 1;
-}
-
-static int crypt_sysfs_get_holders_dir(const char *device, char *path, int size)
-{
- struct stat st;
-
- if (stat(device, &st) < 0 || !S_ISBLK(st.st_mode))
- return 0;
-
- if (snprintf(path, size, "/sys/dev/block/%d:%d/holders",
- major(st.st_rdev), minor(st.st_rdev)) < 0)
- return 0;
-
- return 1;
-}
-
-int crypt_sysfs_check_crypt_segment(const char *device, uint64_t offset, uint64_t size)
-{
- DIR *dir;
- struct dirent *d;
- char path[PATH_MAX], *dmname;
- int major, minor, r = 0;
-
- if (!crypt_sysfs_get_holders_dir(device, path, sizeof(path)))
- return -EINVAL;
-
- if (!(dir = opendir(path)))
- return -EINVAL;
-
- while (!r && (d = readdir(dir))) {
- if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
- continue;
-
- if (!dm_is_dm_kernel_name(d->d_name)) {
- r = -EBUSY;
- break;
- }
-
- if (!crypt_sysfs_get_major_minor(d->d_name, &major, &minor)) {
- r = -EINVAL;
- break;
- }
-
- if (!(dmname = dm_device_path(NULL, major, minor))) {
- r = -EINVAL;
- break;
- }
- r = dm_check_segment(dmname, offset, size);
- free(dmname);
- }
- closedir(dir);
-
- return r;
-}
-
int crypt_sysfs_get_rotational(int major, int minor, int *rotational)
{
char path[PATH_MAX], tmp[64] = {0};