src/shared/loop-util.h

   1 #pragma once
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2016 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include "macro.h"
  23
  24 typedef struct LoopDevice LoopDevice;
  25
  26 /* Some helpers for setting up loopback block devices */
  27
  28 struct LoopDevice {
  29         int fd;
  30         int nr;
  31         char *node;
  32 };
  33
  34 int loop_device_make(int fd, int open_flags, LoopDevice **ret);
  35 int loop_device_make_by_path(const char *path, int open_flags, LoopDevice **ret);
  36
  37 LoopDevice* loop_device_unref(LoopDevice *d);
  38
  39 DEFINE_TRIVIAL_CLEANUP_FUNC(LoopDevice*, loop_device_unref);