fs/ocfs2/xattr.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * xattr.h
   4  *
   5  * Copyright (C) 2004, 2008 Oracle.  All rights reserved.
   6  */
   7
   8 #ifndef OCFS2_XATTR_H
   9 #define OCFS2_XATTR_H
  10
  11 #include <linux/init.h>
  12 #include <linux/xattr.h>
  13
  14 enum ocfs2_xattr_type {
  15         OCFS2_XATTR_INDEX_USER = 1,
  16         OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS,
  17         OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
  18         OCFS2_XATTR_INDEX_TRUSTED,
  19         OCFS2_XATTR_INDEX_SECURITY,
  20         OCFS2_XATTR_MAX
  21 };
  22
  23 struct ocfs2_security_xattr_info {
  24         int enable;
  25         const char *name;
  26         void *value;
  27         size_t value_len;
  28 };
  29
  30 extern const struct xattr_handler ocfs2_xattr_user_handler;
  31 extern const struct xattr_handler ocfs2_xattr_trusted_handler;
  32 extern const struct xattr_handler ocfs2_xattr_security_handler;
  33 extern const struct xattr_handler * const ocfs2_xattr_handlers[];
  34
  35 ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
  36 int ocfs2_xattr_get_nolock(struct inode *, struct buffer_head *, int,
  37                            const char *, void *, size_t);
  38 int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
  39                     size_t, int);
  40 int ocfs2_xattr_set_handle(handle_t *, struct inode *, struct buffer_head *,
  41                            int, const char *, const void *, size_t, int,
  42                            struct ocfs2_alloc_context *,
  43                            struct ocfs2_alloc_context *);
  44 int ocfs2_has_inline_xattr_value_outside(struct inode *inode,
  45                                          struct ocfs2_dinode *di);
  46 int ocfs2_xattr_remove(struct inode *, struct buffer_head *);
  47 int ocfs2_init_security_get(struct inode *, struct inode *,
  48                             const struct qstr *,
  49                             struct ocfs2_security_xattr_info *);
  50 int ocfs2_init_security_set(handle_t *, struct inode *,
  51                             struct buffer_head *,
  52                             struct ocfs2_security_xattr_info *,
  53                             struct ocfs2_alloc_context *,
  54                             struct ocfs2_alloc_context *);
  55 int ocfs2_calc_security_init(struct inode *,
  56                              struct ocfs2_security_xattr_info *,
  57                              int *, int *, struct ocfs2_alloc_context **);
  58 int ocfs2_calc_xattr_init(struct inode *, struct buffer_head *,
  59                           umode_t, struct ocfs2_security_xattr_info *,
  60                           int *, int *, int *);
  61
  62 /*
  63  * xattrs can live inside an inode, as part of an external xattr block,
  64  * or inside an xattr bucket, which is the leaf of a tree rooted in an
  65  * xattr block.  Some of the xattr calls, especially the value setting
  66  * functions, want to treat each of these locations as equal.  Let's wrap
  67  * them in a structure that we can pass around instead of raw buffer_heads.
  68  */
  69 struct ocfs2_xattr_value_buf {
  70         struct buffer_head              *vb_bh;
  71         ocfs2_journal_access_func       vb_access;
  72         struct ocfs2_xattr_value_root   *vb_xv;
  73 };
  74
  75 int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
  76                                      struct buffer_head *fe_bh,
  77                                      struct ocfs2_caching_info *ref_ci,
  78                                      struct buffer_head *ref_root_bh,
  79                                      struct ocfs2_cached_dealloc_ctxt *dealloc);
  80 int ocfs2_reflink_xattrs(struct inode *old_inode,
  81                          struct buffer_head *old_bh,
  82                          struct inode *new_inode,
  83                          struct buffer_head *new_bh,
  84                          bool preserve_security);
  85 int ocfs2_init_security_and_acl(struct inode *dir,
  86                                 struct inode *inode,
  87                                 const struct qstr *qstr);
  88 #endif /* OCFS2_XATTR_H */