Use action names in veritysetup (similar to cryptsetup).

[platform/upstream/cryptsetup.git] / lib / utils_devpath.c

diff --git a/lib/utils_devpath.c b/lib/utils_devpath.c
index f78a36e..31289ee 100644 (file)
--- a/lib/utils_devpath.c
+++ b/lib/utils_devpath.c
@@ -3,7 +3,7 @@
  *
  * 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.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -16,7 +16,7 @@
  *
  * 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>
@@ -24,11 +24,15 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <dirent.h>
+#include <fcntl.h>
+#include <errno.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)
 {
@@ -146,7 +150,7 @@ char *crypt_lookup_dev(const char *dev_id)
        devname++;
 
        if (dm_is_dm_kernel_name(devname))
-               devpath = dm_device_path(major, minor);
+               devpath = dm_device_path("/dev/mapper/", major, minor);
        else if (snprintf(path, sizeof(path), "/dev/%s", devname) > 0)
                devpath = strdup(path);
 
@@ -163,3 +167,102 @@ char *crypt_lookup_dev(const char *dev_id)
 
        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};
+       int fd, r;
+
+       if (snprintf(path, sizeof(path), "/sys/dev/block/%d:%d/queue/rotational",
+                    major, minor) < 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;
+
+        if (sscanf(tmp, "%d", rotational) != 1)
+               return 0;
+
+       return 1;
+}