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author | Josef Bacik <jbacik@redhat.com> | 2008-07-24 12:17:14 -0400 |
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committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:04:05 -0400 |
commit | 7b1287662304c3cb05cb38f5e3e2d69f386e8f10 (patch) | |
tree | bb589bfc3854f801b4098f2f2140e42a2f9e8071 /fs/btrfs/orphan.c | |
parent | 33268eaf0b3db5e2bd12c0ada81a8e8f87a46d68 (diff) | |
download | kernel_samsung_espresso10-7b1287662304c3cb05cb38f5e3e2d69f386e8f10.zip kernel_samsung_espresso10-7b1287662304c3cb05cb38f5e3e2d69f386e8f10.tar.gz kernel_samsung_espresso10-7b1287662304c3cb05cb38f5e3e2d69f386e8f10.tar.bz2 |
Btrfs: Create orphan inode records to prevent lost files after a crash
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/orphan.c')
-rw-r--r-- | fs/btrfs/orphan.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/fs/btrfs/orphan.c b/fs/btrfs/orphan.c new file mode 100644 index 0000000..3c0d52a --- /dev/null +++ b/fs/btrfs/orphan.c @@ -0,0 +1,67 @@ +/* + * Copyright (C) 2008 Red Hat. All rights reserved. + * + * 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 "ctree.h" +#include "disk-io.h" + +int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, u64 offset) +{ + struct btrfs_path *path; + struct btrfs_key key; + int ret = 0; + + key.objectid = BTRFS_ORPHAN_OBJECTID; + btrfs_set_key_type(&key, BTRFS_ORPHAN_ITEM_KEY); + key.offset = offset; + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + + ret = btrfs_insert_empty_item(trans, root, path, &key, 0); + + btrfs_free_path(path); + return ret; +} + +int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, u64 offset) +{ + struct btrfs_path *path; + struct btrfs_key key; + int ret = 0; + + key.objectid = BTRFS_ORPHAN_OBJECTID; + btrfs_set_key_type(&key, BTRFS_ORPHAN_ITEM_KEY); + key.offset = offset; + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + + ret = btrfs_search_slot(trans, root, &key, path, -1, 1); + if (ret) + goto out; + + ret = btrfs_del_item(trans, root, path); + +out: + btrfs_free_path(path); + return ret; +} |