diff options
author | Omar Sandoval <osandov@fb.com> | 2018-02-15 11:04:47 -0800 |
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committer | David Sterba <dsterba@suse.com> | 2018-02-24 01:37:16 +0100 |
commit | 502e2a3510c5db03335c0df8abc7f9804a65207b (patch) | |
tree | 09aa390489e91d46aa92ac2bd49528cb7ad8304a /libbtrfsutil/btrfsutil_internal.h | |
parent | 510bb4ccc4258567e731b81c4722a6adc7faec8b (diff) |
Add libbtrfsutil
Currently, users wishing to manage Btrfs filesystems programatically
have to shell out to btrfs-progs and parse the output. This isn't ideal.
The goal of libbtrfsutil is to provide a library version of as many of
the operations of btrfs-progs as possible and to migrate btrfs-progs to
use it.
Rather than simply refactoring the existing btrfs-progs code, the code
has to be written from scratch for a couple of reasons:
* A lot of the btrfs-progs code was not designed with a nice library API
in mind in terms of reusability, naming, and error reporting.
* libbtrfsutil is licensed under the LGPL, whereas btrfs-progs is under
the GPL, which makes it dubious to directly copy or move the code.
Eventually, most of the low-level btrfs-progs code should either live in
libbtrfsutil or the shared kernel/userspace filesystem code, and
btrfs-progs will just be the CLI wrapper.
This first commit just includes the build system changes, license,
README, and error reporting helper.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'libbtrfsutil/btrfsutil_internal.h')
-rw-r--r-- | libbtrfsutil/btrfsutil_internal.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/libbtrfsutil/btrfsutil_internal.h b/libbtrfsutil/btrfsutil_internal.h new file mode 100644 index 00000000..f1aae0aa --- /dev/null +++ b/libbtrfsutil/btrfsutil_internal.h @@ -0,0 +1,40 @@ +/* + * Copyright (C) 2018 Facebook + * + * This file is part of libbtrfsutil. + * + * libbtrfsutil is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * libbtrfsutil is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with libbtrfsutil. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef BTRFS_UTIL_INTERNAL_H +#define BTRFS_UTIL_INTERNAL_H + +#include <asm/byteorder.h> + +#include "btrfsutil.h" + +#define PUBLIC __attribute__((visibility("default"))) + +#define le16_to_cpu __le16_to_cpu +#define le32_to_cpu __le32_to_cpu +#define le64_to_cpu __le64_to_cpu + +#define SAVE_ERRNO_AND_CLOSE(fd) do { \ + int saved_errno = errno; \ + \ + close(fd); \ + errno = saved_errno; \ +} while (0) + +#endif /* BTRFS_UTIL_INTERNAL_H */ |