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https://github.com/kdave/btrfs-progs
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09559bfe7b
Check_mount() should also work with multi device filesystems. This patch adds checks that allow to detect if a file is a device file used by a mounted single or multi device btrfs or if it is a regular file used by a loopback device that is part of a mounted single or multi device btrfs. The single device checks also work for non-btrfs filesystems. This might be helpful to prevent users from running btrfs programs (e.g. mkfs.btrfs) accidentally on a filesystem used somewhere else. Signed-off-by: Andi Drebes <lists-receive@programmierforen.de>
44 lines
1.7 KiB
C
44 lines
1.7 KiB
C
/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __UTILS__
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#define __UTILS__
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#define BTRFS_MKFS_SYSTEM_GROUP_SIZE (4 * 1024 * 1024)
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int make_btrfs(int fd, const char *device, const char *label,
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u64 blocks[6], u64 num_bytes, u32 nodesize,
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u32 leafsize, u32 sectorsize, u32 stripesize);
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int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, u64 objectid);
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int btrfs_prepare_device(int fd, char *file, int zero_end,
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u64 *block_count_ret);
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int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, int fd, char *path,
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u64 block_count, u32 io_width, u32 io_align,
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u32 sectorsize);
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int btrfs_scan_for_fsid(struct btrfs_fs_devices *fs_devices, u64 total_devs,
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int run_ioctls);
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void btrfs_register_one_device(char *fname);
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int btrfs_scan_one_dir(char *dirname, int run_ioctl);
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int check_mounted(const char *devicename);
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int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
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int super_offset);
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char *pretty_sizes(u64 size);
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#endif
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