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 enum bkey_invalid_flags;
   8 extern const struct bch_hash_desc bch2_dirent_hash_desc;
   9
  10 int bch2_dirent_invalid(struct bch_fs *, struct bkey_s_c,
  11                         enum bkey_invalid_flags, struct printbuf *);
  12 void bch2_dirent_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
  13
  14 #define bch2_bkey_ops_dirent ((struct bkey_ops) {       \
  15         .key_invalid    = bch2_dirent_invalid,          \
  16         .val_to_text    = bch2_dirent_to_text,          \
  17         .min_val_size   = 16,                           \
  18 })
  19
  20 struct qstr;
  21 struct file;
  22 struct dir_context;
  23 struct bch_fs;
  24 struct bch_hash_info;
  25 struct bch_inode_info;
  26
  27 struct qstr bch2_dirent_get_name(struct bkey_s_c_dirent d);
  28
  29 static inline unsigned dirent_val_u64s(unsigned len)
  30 {
  31         return DIV_ROUND_UP(offsetof(struct bch_dirent, d_name) + len,
  32                             sizeof(u64));
  33 }
  34
  35 int bch2_dirent_read_target(struct btree_trans *, subvol_inum,
  36                             struct bkey_s_c_dirent, subvol_inum *);
  37
  38 int bch2_dirent_create(struct btree_trans *, subvol_inum,
  39                        const struct bch_hash_info *, u8,
  40                        const struct qstr *, u64, u64 *,
  41                        bch_str_hash_flags_t);
  42
  43 static inline unsigned vfs_d_type(unsigned type)
  44 {
  45         return type == DT_SUBVOL ? DT_DIR : type;
  46 }
  47
  48 enum bch_rename_mode {
  49         BCH_RENAME,
  50         BCH_RENAME_OVERWRITE,
  51         BCH_RENAME_EXCHANGE,
  52 };
  53
  54 int bch2_dirent_rename(struct btree_trans *,
  55                        subvol_inum, struct bch_hash_info *,
  56                        subvol_inum, struct bch_hash_info *,
  57                        const struct qstr *, subvol_inum *, u64 *,
  58                        const struct qstr *, subvol_inum *, u64 *,
  59                        enum bch_rename_mode);
  60
  61 int __bch2_dirent_lookup_trans(struct btree_trans *, struct btree_iter *,
  62                                subvol_inum, const struct bch_hash_info *,
  63                                const struct qstr *, subvol_inum *, unsigned);
  64 u64 bch2_dirent_lookup(struct bch_fs *, subvol_inum,
  65                        const struct bch_hash_info *,
  66                        const struct qstr *, subvol_inum *);
  67
  68 int bch2_empty_dir_trans(struct btree_trans *, subvol_inum);
  69 int bch2_readdir(struct bch_fs *, subvol_inum, struct dir_context *);
  70
  71 #endif /* _BCACHEFS_DIRENT_H */