git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/dirent.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_DIRENT_H
   3 #define _BCACHEFS_DIRENT_H
   4
   5 #include "str_hash.h"
   6
   7 extern const struct bch_hash_desc bch2_dirent_hash_desc;
   8
   9 int bch2_dirent_invalid(const struct bch_fs *, struct bkey_s_c, unsigned, struct printbuf *);
  10 void bch2_dirent_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
  11
  12 #define bch2_bkey_ops_dirent ((struct bkey_ops) {       \
  13         .key_invalid    = bch2_dirent_invalid,          \
  14         .val_to_text    = bch2_dirent_to_text,          \
  15         .min_val_size   = 16,                           \
  16 })
  17
  18 struct qstr;
  19 struct file;
  20 struct dir_context;
  21 struct bch_fs;
  22 struct bch_hash_info;
  23 struct bch_inode_info;
  24
  25 unsigned bch2_dirent_name_bytes(struct bkey_s_c_dirent);
  26
  27 static inline unsigned dirent_val_u64s(unsigned len)
  28 {
  29         return DIV_ROUND_UP(offsetof(struct bch_dirent, d_name) + len,
  30                             sizeof(u64));
  31 }
  32
  33 int bch2_dirent_read_target(struct btree_trans *, subvol_inum,
  34                             struct bkey_s_c_dirent, subvol_inum *);
  35
  36 int bch2_dirent_create(struct btree_trans *, subvol_inum,
  37                        const struct bch_hash_info *, u8,
  38                        const struct qstr *, u64, u64 *, int);
  39
  40 static inline unsigned vfs_d_type(unsigned type)
  41 {
  42         return type == DT_SUBVOL ? DT_DIR : type;
  43 }
  44
  45 enum bch_rename_mode {
  46         BCH_RENAME,
  47         BCH_RENAME_OVERWRITE,
  48         BCH_RENAME_EXCHANGE,
  49 };
  50
  51 int bch2_dirent_rename(struct btree_trans *,
  52                        subvol_inum, struct bch_hash_info *,
  53                        subvol_inum, struct bch_hash_info *,
  54                        const struct qstr *, subvol_inum *, u64 *,
  55                        const struct qstr *, subvol_inum *, u64 *,
  56                        enum bch_rename_mode);
  57
  58 int __bch2_dirent_lookup_trans(struct btree_trans *, struct btree_iter *,
  59                                subvol_inum, const struct bch_hash_info *,
  60                                const struct qstr *, subvol_inum *, unsigned);
  61 u64 bch2_dirent_lookup(struct bch_fs *, subvol_inum,
  62                        const struct bch_hash_info *,
  63                        const struct qstr *, subvol_inum *);
  64
  65 int bch2_empty_dir_trans(struct btree_trans *, subvol_inum);
  66 int bch2_readdir(struct bch_fs *, subvol_inum, struct dir_context *);
  67
  68 #endif /* _BCACHEFS_DIRENT_H */