1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef BTRFS_FILE_ITEM_H 4 #define BTRFS_FILE_ITEM_H 5 6 #include "accessors.h" 7 8 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 9 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 10 11 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 12 { 13 return BTRFS_MAX_ITEM_SIZE(info) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 14 } 15 16 /* 17 * Return the number of bytes used by the item on disk, minus the size of any 18 * extent headers. If a file is compressed on disk, this is the compressed 19 * size. 20 */ 21 static inline u32 btrfs_file_extent_inline_item_len( 22 const struct extent_buffer *eb, 23 int nr) 24 { 25 return btrfs_item_size(eb, nr) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 26 } 27 28 static inline unsigned long btrfs_file_extent_inline_start( 29 const struct btrfs_file_extent_item *e) 30 { 31 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 32 } 33 34 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 35 { 36 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 37 } 38 39 int btrfs_del_csums(struct btrfs_trans_handle *trans, 40 struct btrfs_root *root, u64 bytenr, u64 len); 41 blk_status_t btrfs_lookup_bio_sums(struct btrfs_bio *bbio); 42 int btrfs_insert_hole_extent(struct btrfs_trans_handle *trans, 43 struct btrfs_root *root, u64 objectid, u64 pos, 44 u64 num_bytes); 45 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 46 struct btrfs_root *root, 47 struct btrfs_path *path, u64 objectid, 48 u64 bytenr, int mod); 49 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 50 struct btrfs_root *root, 51 struct btrfs_ordered_sum *sums); 52 blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio); 53 blk_status_t btrfs_alloc_dummy_sum(struct btrfs_bio *bbio); 54 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 55 struct list_head *list, int search_commit, 56 bool nowait); 57 int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end, 58 struct list_head *list, int search_commit, 59 bool nowait); 60 int btrfs_lookup_csums_bitmap(struct btrfs_root *root, u64 start, u64 end, 61 u8 *csum_buf, unsigned long *csum_bitmap, 62 bool search_commit); 63 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 64 const struct btrfs_path *path, 65 struct btrfs_file_extent_item *fi, 66 struct extent_map *em); 67 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, 68 u64 len); 69 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, u64 len); 70 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size); 71 u64 btrfs_file_extent_end(const struct btrfs_path *path); 72 73 #endif 74