*
* Copyright (C) 2004, Christophe Saout <christophe@saout.de>
* Copyright (C) 2004-2007, Clemens Fruhwirth <clemens@endorphin.org>
- * Copyright (C) 2009-2011, Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2009-2012, Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2009-2013, Milan Broz
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
+ * 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
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <string.h>
#include <dirent.h>
#include <fcntl.h>
#include <errno.h>
+#include <limits.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "utils_dm.h"
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)
+static int _sysfs_get_uint64(int major, int minor, uint64_t *value, const char *attr)
{
char path[PATH_MAX], tmp[64] = {0};
- int fd, r = 0;
+ int fd, r;
- if (snprintf(path, sizeof(path), "/sys/block/%s/dev", kname) < 0)
+ if (snprintf(path, sizeof(path), "/sys/dev/block/%d:%d/%s",
+ major, minor, attr) < 0)
return 0;
if ((fd = open(path, O_RDONLY)) < 0)
if (r <= 0)
return 0;
- tmp[63] = '\0';
- if (sscanf(tmp, "%d:%d", major, minor) != 2)
+ if (sscanf(tmp, "%" PRIu64, value) != 1)
return 0;
return 1;
}
-static int crypt_sysfs_get_holders_dir(const char *device, char *path, int size)
+int crypt_sysfs_get_rotational(int major, int minor, int *rotational)
{
- struct stat st;
-
- if (stat(device, &st) < 0 || !S_ISBLK(st.st_mode))
- return 0;
+ uint64_t val;
- if (snprintf(path, size, "/sys/dev/block/%d:%d/holders",
- major(st.st_rdev), minor(st.st_rdev)) < 0)
+ if (!_sysfs_get_uint64(major, minor, &val, "queue/rotational"))
return 0;
+ *rotational = val ? 1 : 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)
+int crypt_sysfs_get_partition(const char *dev_path, int *partition)
{
- char path[PATH_MAX], tmp[64] = {0};
- int fd, r;
-
- if (snprintf(path, sizeof(path), "/sys/dev/block/%d:%d/queue/rotational",
- major, minor) < 0)
- return 0;
+ uint64_t val;
+ struct stat st;
- if ((fd = open(path, O_RDONLY)) < 0)
+ if (stat(dev_path, &st) < 0)
return 0;
- r = read(fd, tmp, sizeof(tmp));
- close(fd);
- if (r <= 0)
+ if (!S_ISBLK(st.st_mode))
return 0;
- if (sscanf(tmp, "%d", rotational) != 1)
+ if (!_sysfs_get_uint64(major(st.st_rdev), minor(st.st_rdev),
+ &val, "partition"))
return 0;
+ *partition = val ? 1 : 0;
return 1;
}