fs/bcachefs/xattr.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_XATTR_H
   3 #define _BCACHEFS_XATTR_H
   4
   5 #include "str_hash.h"
   6
   7 extern const struct bch_hash_desc bch2_xattr_hash_desc;
   8
   9 int bch2_xattr_validate(struct bch_fs *, struct bkey_s_c, enum bch_validate_flags);
  10 void bch2_xattr_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
  11
  12 #define bch2_bkey_ops_xattr ((struct bkey_ops) {        \
  13         .key_validate   = bch2_xattr_validate,          \
  14         .val_to_text    = bch2_xattr_to_text,           \
  15         .min_val_size   = 8,                            \
  16 })
  17
  18 static inline unsigned xattr_val_u64s(unsigned name_len, unsigned val_len)
  19 {
  20         return DIV_ROUND_UP(offsetof(struct bch_xattr, x_name) +
  21                             name_len + val_len, sizeof(u64));
  22 }
  23
  24 #define xattr_val(_xattr)                                       \
  25         ((void *) (_xattr)->x_name + (_xattr)->x_name_len)
  26
  27 struct xattr_search_key {
  28         u8              type;
  29         struct qstr     name;
  30 };
  31
  32 #define X_SEARCH(_type, _name, _len) ((struct xattr_search_key) \
  33         { .type = _type, .name = QSTR_INIT(_name, _len) })
  34
  35 struct dentry;
  36 struct xattr_handler;
  37 struct bch_hash_info;
  38 struct bch_inode_info;
  39
  40 /* Exported for cmd_migrate.c in tools: */
  41 int bch2_xattr_set(struct btree_trans *, subvol_inum,
  42                    struct bch_inode_unpacked *, const struct bch_hash_info *,
  43                    const char *, const void *, size_t, int, int);
  44
  45 ssize_t bch2_xattr_list(struct dentry *, char *, size_t);
  46
  47 extern const struct xattr_handler *bch2_xattr_handlers[];
  48
  49 #endif /* _BCACHEFS_XATTR_H */