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-rw-r--r--fs/btrfs/inode-item.h94
1 files changed, 94 insertions, 0 deletions
diff --git a/fs/btrfs/inode-item.h b/fs/btrfs/inode-item.h
new file mode 100644
index 000000000..b80aeb715
--- /dev/null
+++ b/fs/btrfs/inode-item.h
@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef BTRFS_INODE_ITEM_H
+#define BTRFS_INODE_ITEM_H
+
+#include <linux/types.h>
+
+struct btrfs_trans_handle;
+struct btrfs_root;
+struct btrfs_path;
+struct btrfs_key;
+struct btrfs_inode_extref;
+struct btrfs_inode;
+struct extent_buffer;
+
+/*
+ * Return this if we need to call truncate_block for the last bit of the
+ * truncate.
+ */
+#define BTRFS_NEED_TRUNCATE_BLOCK 1
+
+struct btrfs_truncate_control {
+ /*
+ * IN: the inode we're operating on, this can be NULL if
+ * ->clear_extent_range is false.
+ */
+ struct btrfs_inode *inode;
+
+ /* IN: the size we're truncating to. */
+ u64 new_size;
+
+ /* OUT: the number of extents truncated. */
+ u64 extents_found;
+
+ /* OUT: the last size we truncated this inode to. */
+ u64 last_size;
+
+ /* OUT: the number of bytes to sub from this inode. */
+ u64 sub_bytes;
+
+ /* IN: the ino we are truncating. */
+ u64 ino;
+
+ /*
+ * IN: minimum key type to remove. All key types with this type are
+ * removed only if their offset >= new_size.
+ */
+ u32 min_type;
+
+ /*
+ * IN: true if we don't want to do extent reference updates for any file
+ * extents we drop.
+ */
+ bool skip_ref_updates;
+
+ /*
+ * IN: true if we need to clear the file extent range for the inode as
+ * we drop the file extent items.
+ */
+ bool clear_extent_range;
+};
+
+int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_truncate_control *control);
+int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, const struct fscrypt_str *name,
+ u64 inode_objectid, u64 ref_objectid, u64 index);
+int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, const struct fscrypt_str *name,
+ u64 inode_objectid, u64 ref_objectid, u64 *index);
+int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path, u64 objectid);
+int btrfs_lookup_inode(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct btrfs_path *path,
+ struct btrfs_key *location, int mod);
+
+struct btrfs_inode_extref *btrfs_lookup_inode_extref(
+ struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path,
+ const struct fscrypt_str *name,
+ u64 inode_objectid, u64 ref_objectid, int ins_len,
+ int cow);
+
+struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
+ int slot,
+ const struct fscrypt_str *name);
+struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
+ struct extent_buffer *leaf, int slot, u64 ref_objectid,
+ const struct fscrypt_str *name);
+
+#endif