fs/bcachefs/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 bch_validate_flags;
   8 extern const struct bch_hash_desc bch2_dirent_hash_desc;
   9
  10 int bch2_dirent_validate(struct bch_fs *, struct bkey_s_c, enum bch_validate_flags);
  11 void bch2_dirent_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
  12
  13 #define bch2_bkey_ops_dirent ((struct bkey_ops) {       \
  14         .key_validate   = bch2_dirent_validate,         \
  15         .val_to_text    = bch2_dirent_to_text,          \
  16         .min_val_size   = 16,                           \
  17 })
  18
  19 struct qstr;
  20 struct file;
  21 struct dir_context;
  22 struct bch_fs;
  23 struct bch_hash_info;
  24 struct bch_inode_info;
  25
  26 struct qstr bch2_dirent_get_name(struct bkey_s_c_dirent d);
  27
  28 static inline unsigned dirent_val_u64s(unsigned len)
  29 {
  30         return DIV_ROUND_UP(offsetof(struct bch_dirent, d_name) + len,
  31                             sizeof(u64));
  32 }
  33
  34 int bch2_dirent_read_target(struct btree_trans *, subvol_inum,
  35                             struct bkey_s_c_dirent, subvol_inum *);
  36
  37 static inline void dirent_copy_target(struct bkey_i_dirent *dst,
  38                                       struct bkey_s_c_dirent src)
  39 {
  40         dst->v.d_inum = src.v->d_inum;
  41         dst->v.d_type = src.v->d_type;
  42 }
  43
  44 int bch2_dirent_create_snapshot(struct btree_trans *, u32, u64, u32,
  45                         const struct bch_hash_info *, u8,
  46                         const struct qstr *, u64, u64 *,
  47                         enum btree_iter_update_trigger_flags);
  48 int bch2_dirent_create(struct btree_trans *, subvol_inum,
  49                        const struct bch_hash_info *, u8,
  50                        const struct qstr *, u64, u64 *,
  51                        enum btree_iter_update_trigger_flags);
  52
  53 static inline unsigned vfs_d_type(unsigned type)
  54 {
  55         return type == DT_SUBVOL ? DT_DIR : type;
  56 }
  57
  58 enum bch_rename_mode {
  59         BCH_RENAME,
  60         BCH_RENAME_OVERWRITE,
  61         BCH_RENAME_EXCHANGE,
  62 };
  63
  64 int bch2_dirent_rename(struct btree_trans *,
  65                        subvol_inum, struct bch_hash_info *,
  66                        subvol_inum, struct bch_hash_info *,
  67                        const struct qstr *, subvol_inum *, u64 *,
  68                        const struct qstr *, subvol_inum *, u64 *,
  69                        enum bch_rename_mode);
  70
  71 int bch2_dirent_lookup_trans(struct btree_trans *, struct btree_iter *,
  72                                subvol_inum, const struct bch_hash_info *,
  73                                const struct qstr *, subvol_inum *, unsigned);
  74 u64 bch2_dirent_lookup(struct bch_fs *, subvol_inum,
  75                        const struct bch_hash_info *,
  76                        const struct qstr *, subvol_inum *);
  77
  78 int bch2_empty_dir_snapshot(struct btree_trans *, u64, u32, u32);
  79 int bch2_empty_dir_trans(struct btree_trans *, subvol_inum);
  80 int bch2_readdir(struct bch_fs *, subvol_inum, struct dir_context *);
  81
  82 #endif /* _BCACHEFS_DIRENT_H */