btrfs-progs/libbtrfsutil/errors.c
Omar Sandoval 2a74c0e4ee libbtrfsutil: relax the privileges of subvolume iterator
We can use the new BTRFS_IOC_GET_SUBVOL_ROOTREF and
BTRFS_IOC_INO_LOOKUP_USER ioctls to allow non-root users to list
subvolumes.

This is based on a patch from Misono Tomohiro but takes a different
approach (mainly, this approach is more similar to the existing tree
search approach).

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2018-11-26 16:45:34 +01:00

64 lines
2.9 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",
[BTRFS_UTIL_ERROR_GET_SUBVOL_INFO_FAILED] =
"Could not get subvolume information with BTRFS_IOC_GET_SUBVOL_INFO",
[BTRFS_UTIL_ERROR_GET_SUBVOL_ROOTREF_FAILED] =
"Could not get rootref information with BTRFS_IOC_GET_SUBVOL_ROOTREF",
[BTRFS_UTIL_ERROR_INO_LOOKUP_USER_FAILED] =
"Could not resolve subvolume path with BTRFS_IOC_INO_LOOKUP_USER",
[BTRFS_UTIL_ERROR_FS_INFO_FAILED] =
"Could not get filesystem information",
};
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];
}