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 8 struct btrfs_trans_handle; 9 struct btrfs_root; 10 struct btrfs_path; 11 struct btrfs_key; 12 struct btrfs_inode_extref; 13 struct btrfs_inode; 14 struct 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 22 struct 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 63 /* 64 * btrfs_inode_item stores flags in a u64, btrfs_inode stores them in two 65 * separate u32s. These two functions convert between the two representations. 66 */ 67 static inline u64 btrfs_inode_combine_flags(u32 flags, u32 ro_flags) 68 { 69 return (flags | ((u64)ro_flags << 32)); 70 } 71 72 static inline void btrfs_inode_split_flags(u64 inode_item_flags, 73 u32 *flags, u32 *ro_flags) 74 { 75 *flags = (u32)inode_item_flags; 76 *ro_flags = (u32)(inode_item_flags >> 32); 77 } 78 79 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 80 struct btrfs_root *root, 81 struct btrfs_truncate_control *control); 82 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 83 struct btrfs_root *root, const struct fscrypt_str *name, 84 u64 inode_objectid, u64 ref_objectid, u64 index); 85 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 86 struct btrfs_root *root, const struct fscrypt_str *name, 87 u64 inode_objectid, u64 ref_objectid, u64 *index); 88 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 89 struct btrfs_root *root, 90 struct btrfs_path *path, u64 objectid); 91 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, 92 struct btrfs_root *root, struct btrfs_path *path, 93 struct btrfs_key *location, int mod); 94 95 struct btrfs_inode_extref *btrfs_lookup_inode_extref( 96 struct btrfs_trans_handle *trans, 97 struct btrfs_root *root, 98 struct btrfs_path *path, 99 const struct fscrypt_str *name, 100 u64 inode_objectid, u64 ref_objectid, int ins_len, 101 int cow); 102 103 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 104 int slot, 105 const struct fscrypt_str *name); 106 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 107 struct extent_buffer *leaf, int slot, u64 ref_objectid, 108 const struct fscrypt_str *name); 109 110 #endif 111