1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef BTRFS_FILE_ITEM_H 4 #define BTRFS_FILE_ITEM_H 5 6 #include <linux/blk_types.h> 7 #include <linux/list.h> 8 #include <uapi/linux/btrfs_tree.h> 9 #include "ctree.h" 10 #include "accessors.h" 11 12 struct extent_map; 13 struct btrfs_file_extent_item; 14 struct btrfs_fs_info; 15 struct btrfs_path; 16 struct btrfs_bio; 17 struct btrfs_trans_handle; 18 struct btrfs_root; 19 struct btrfs_ordered_sum; 20 struct btrfs_path; 21 struct btrfs_inode; 22 23 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 24 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 25 26 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 27 { 28 return BTRFS_MAX_ITEM_SIZE(info) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 29 } 30 31 /* 32 * Return the number of bytes used by the item on disk, minus the size of any 33 * extent headers. If a file is compressed on disk, this is the compressed 34 * size. 35 */ 36 static inline u32 btrfs_file_extent_inline_item_len( 37 const struct extent_buffer *eb, 38 int nr) 39 { 40 return btrfs_item_size(eb, nr) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 41 } 42 43 static inline unsigned long btrfs_file_extent_inline_start( 44 const struct btrfs_file_extent_item *e) 45 { 46 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 47 } 48 49 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 50 { 51 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 52 } 53 54 int btrfs_del_csums(struct btrfs_trans_handle *trans, 55 struct btrfs_root *root, u64 bytenr, u64 len); 56 blk_status_t btrfs_lookup_bio_sums(struct btrfs_bio *bbio); 57 int btrfs_insert_hole_extent(struct btrfs_trans_handle *trans, 58 struct btrfs_root *root, u64 objectid, u64 pos, 59 u64 num_bytes); 60 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 61 struct btrfs_root *root, 62 struct btrfs_path *path, u64 objectid, 63 u64 bytenr, int mod); 64 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 65 struct btrfs_root *root, 66 struct btrfs_ordered_sum *sums); 67 blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio); 68 blk_status_t btrfs_alloc_dummy_sum(struct btrfs_bio *bbio); 69 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 70 struct list_head *list, int search_commit, 71 bool nowait); 72 int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end, 73 struct list_head *list, bool nowait); 74 int btrfs_lookup_csums_bitmap(struct btrfs_root *root, struct btrfs_path *path, 75 u64 start, u64 end, u8 *csum_buf, 76 unsigned long *csum_bitmap); 77 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 78 const struct btrfs_path *path, 79 const struct btrfs_file_extent_item *fi, 80 struct extent_map *em); 81 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, 82 u64 len); 83 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, u64 len); 84 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size); 85 u64 btrfs_file_extent_end(const struct btrfs_path *path); 86 87 #endif 88