btrfs-progs/libbtrfsutil/errors.c
Omar Sandoval 502e2a3510 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>
2018-02-24 01:37:16 +01:00

56 lines
2.4 KiB
C

/*
* 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/>.
*/
#include <stddef.h>
#include "btrfsutil_internal.h"
static const char * const error_messages[] = {
[BTRFS_UTIL_OK] = "Success",
[BTRFS_UTIL_ERROR_STOP_ITERATION] = "Stop iteration",
[BTRFS_UTIL_ERROR_NO_MEMORY] = "Cannot allocate memory",
[BTRFS_UTIL_ERROR_INVALID_ARGUMENT] = "Invalid argument",
[BTRFS_UTIL_ERROR_NOT_BTRFS] = "Not a Btrfs filesystem",
[BTRFS_UTIL_ERROR_NOT_SUBVOLUME] = "Not a Btrfs subvolume",
[BTRFS_UTIL_ERROR_SUBVOLUME_NOT_FOUND] = "Subvolume not found",
[BTRFS_UTIL_ERROR_OPEN_FAILED] = "Could not open",
[BTRFS_UTIL_ERROR_RMDIR_FAILED] = "Could not rmdir",
[BTRFS_UTIL_ERROR_UNLINK_FAILED] = "Could not unlink",
[BTRFS_UTIL_ERROR_STAT_FAILED] = "Could not stat",
[BTRFS_UTIL_ERROR_STATFS_FAILED] = "Could not statfs",
[BTRFS_UTIL_ERROR_SEARCH_FAILED] = "Could not search B-tree",
[BTRFS_UTIL_ERROR_INO_LOOKUP_FAILED] = "Could not lookup inode",
[BTRFS_UTIL_ERROR_SUBVOL_GETFLAGS_FAILED] = "Could not get subvolume flags",
[BTRFS_UTIL_ERROR_SUBVOL_SETFLAGS_FAILED] = "Could not set subvolume flags",
[BTRFS_UTIL_ERROR_SUBVOL_CREATE_FAILED] = "Could not create subvolume",
[BTRFS_UTIL_ERROR_SNAP_CREATE_FAILED] = "Could not create snapshot",
[BTRFS_UTIL_ERROR_SNAP_DESTROY_FAILED] = "Could not destroy subvolume/snapshot",
[BTRFS_UTIL_ERROR_DEFAULT_SUBVOL_FAILED] = "Could not set default subvolume",
[BTRFS_UTIL_ERROR_SYNC_FAILED] = "Could not sync filesystem",
[BTRFS_UTIL_ERROR_START_SYNC_FAILED] = "Could not start filesystem sync",
[BTRFS_UTIL_ERROR_WAIT_SYNC_FAILED] = "Could not wait for filesystem sync",
};
PUBLIC const char *btrfs_util_strerror(enum btrfs_util_error err)
{
if (err < 0 || err >= sizeof(error_messages) / sizeof(error_messages[0]))
return NULL;
return error_messages[err];
}