LXR linux/fs/btrfs/inode-item.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2
   3#ifndef BTRFS_INODE_ITEM_H
   4#define BTRFS_INODE_ITEM_H
   5
   6#include <linux/types.h>
   7
   8struct btrfs_trans_handle;
   9struct btrfs_root;
  10struct btrfs_path;
  11struct btrfs_key;
  12struct btrfs_inode_extref;
  13struct btrfs_inode;
  14struct extent_buffer;
  15
  16/*
  17 * Return this if we need to call truncate_block for the last bit of the
  18 * truncate.
  19 */
  20#define BTRFS_NEED_TRUNCATE_BLOCK               1
  21
  22struct btrfs_truncate_control {
  23        /*
  24         * IN: the inode we're operating on, this can be NULL if
  25         * ->clear_extent_range is false.
  26         */
  27        struct btrfs_inode *inode;
  28
  29        /* IN: the size we're truncating to. */
  30        u64 new_size;
  31
  32        /* OUT: the number of extents truncated. */
  33        u64 extents_found;
  34
  35        /* OUT: the last size we truncated this inode to. */
  36        u64 last_size;
  37
  38        /* OUT: the number of bytes to sub from this inode. */
  39        u64 sub_bytes;
  40
  41        /* IN: the ino we are truncating. */
  42        u64 ino;
  43
  44        /*
  45         * IN: minimum key type to remove.  All key types with this type are
  46         * removed only if their offset >= new_size.
  47         */
  48        u32 min_type;
  49
  50        /*
  51         * IN: true if we don't want to do extent reference updates for any file
  52         * extents we drop.
  53         */
  54        bool skip_ref_updates;
  55
  56        /*
  57         * IN: true if we need to clear the file extent range for the inode as
  58         * we drop the file extent items.
  59         */
  60        bool clear_extent_range;
  61};
  62
  63int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
  64                               struct btrfs_root *root,
  65                               struct btrfs_truncate_control *control);
  66int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
  67                           struct btrfs_root *root,
  68                           const char *name, int name_len,
  69                           u64 inode_objectid, u64 ref_objectid, u64 index);
  70int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
  71                           struct btrfs_root *root,
  72                           const char *name, int name_len,
  73                           u64 inode_objectid, u64 ref_objectid, u64 *index);
  74int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
  75                             struct btrfs_root *root,
  76                             struct btrfs_path *path, u64 objectid);
  77int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
  78                       *root, struct btrfs_path *path,
  79                       struct btrfs_key *location, int mod);
  80
  81struct btrfs_inode_extref *btrfs_lookup_inode_extref(
  82                          struct btrfs_trans_handle *trans,
  83                          struct btrfs_root *root,
  84                          struct btrfs_path *path,
  85                          const char *name, int name_len,
  86                          u64 inode_objectid, u64 ref_objectid, int ins_len,
  87                          int cow);
  88
  89struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf,
  90                                                   int slot, const char *name,
  91                                                   int name_len);
  92struct btrfs_inode_extref *btrfs_find_name_in_ext_backref(
  93                struct extent_buffer *leaf, int slot, u64 ref_objectid,
  94                const char *name, int name_len);
  95
  96#endif
  97