fs/btrfs/file-item.h

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