mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-28 17:12:17 +00:00
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License v2 as published by the Free Software Foundation.
|
|
*
|
|
* This program 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
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 021110-1307, USA.
|
|
*/
|
|
|
|
#include "kerncompat.h"
|
|
#include "kernel-shared/ctree.h"
|
|
#include "kernel-shared/transaction.h"
|
|
#include "common/messages.h"
|
|
|
|
int update_seeding_flag(struct btrfs_root *root, const char *device, int set_flag, int force)
|
|
{
|
|
struct btrfs_trans_handle *trans;
|
|
struct btrfs_super_block *disk_super;
|
|
u64 super_flags;
|
|
int ret;
|
|
|
|
disk_super = root->fs_info->super_copy;
|
|
super_flags = btrfs_super_flags(disk_super);
|
|
if (set_flag) {
|
|
if (super_flags & BTRFS_SUPER_FLAG_SEEDING) {
|
|
if (force)
|
|
return 0;
|
|
else
|
|
warning("seeding flag is already set on %s",
|
|
device);
|
|
return 1;
|
|
}
|
|
if (btrfs_super_log_root(disk_super)) {
|
|
error("filesystem with dirty log detected, not setting seed flag");
|
|
return 1;
|
|
}
|
|
super_flags |= BTRFS_SUPER_FLAG_SEEDING;
|
|
} else {
|
|
if (!(super_flags & BTRFS_SUPER_FLAG_SEEDING)) {
|
|
warning("seeding flag is not set on %s", device);
|
|
return 1;
|
|
}
|
|
super_flags &= ~BTRFS_SUPER_FLAG_SEEDING;
|
|
warning("seeding flag cleared on %s", device);
|
|
}
|
|
|
|
trans = btrfs_start_transaction(root, 1);
|
|
BUG_ON(IS_ERR(trans));
|
|
btrfs_set_super_flags(disk_super, super_flags);
|
|
ret = btrfs_commit_transaction(trans, root);
|
|
|
|
return ret;
|
|
}
|
|
|