fs/ocfs2/xattr.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /* -*- mode: c; c-basic-offset: 8; -*-
   3  * vim: noexpandtab sw=8 ts=8 sts=0:
   4  *
   5  * xattr.h
   6  *
   7  * Copyright (C) 2004, 2008 Oracle.  All rights reserved.
   8  */
   9
  10 #ifndef OCFS2_XATTR_H
  11 #define OCFS2_XATTR_H
  12
  13 #include <linux/init.h>
  14 #include <linux/xattr.h>
  15
  16 enum ocfs2_xattr_type {
  17         OCFS2_XATTR_INDEX_USER = 1,
  18         OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS,
  19         OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
  20         OCFS2_XATTR_INDEX_TRUSTED,
  21         OCFS2_XATTR_INDEX_SECURITY,
  22         OCFS2_XATTR_MAX
  23 };
  24
  25 struct ocfs2_security_xattr_info {
  26         int enable;
  27         const char *name;
  28         void *value;
  29         size_t value_len;
  30 };
  31
  32 extern const struct xattr_handler ocfs2_xattr_user_handler;
  33 extern const struct xattr_handler ocfs2_xattr_trusted_handler;
  34 extern const struct xattr_handler ocfs2_xattr_security_handler;
  35 extern const struct xattr_handler *ocfs2_xattr_handlers[];
  36
  37 ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
  38 int ocfs2_xattr_get_nolock(struct inode *, struct buffer_head *, int,
  39                            const char *, void *, size_t);
  40 int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
  41                     size_t, int);
  42 int ocfs2_xattr_set_handle(handle_t *, struct inode *, struct buffer_head *,
  43                            int, const char *, const void *, size_t, int,
  44                            struct ocfs2_alloc_context *,
  45                            struct ocfs2_alloc_context *);
  46 int ocfs2_has_inline_xattr_value_outside(struct inode *inode,
  47                                          struct ocfs2_dinode *di);
  48 int ocfs2_xattr_remove(struct inode *, struct buffer_head *);
  49 int ocfs2_init_security_get(struct inode *, struct inode *,
  50                             const struct qstr *,
  51                             struct ocfs2_security_xattr_info *);
  52 int ocfs2_init_security_set(handle_t *, struct inode *,
  53                             struct buffer_head *,
  54                             struct ocfs2_security_xattr_info *,
  55                             struct ocfs2_alloc_context *,
  56                             struct ocfs2_alloc_context *);
  57 int ocfs2_calc_security_init(struct inode *,
  58                              struct ocfs2_security_xattr_info *,
  59                              int *, int *, struct ocfs2_alloc_context **);
  60 int ocfs2_calc_xattr_init(struct inode *, struct buffer_head *,
  61                           umode_t, struct ocfs2_security_xattr_info *,
  62                           int *, int *, int *);
  63
  64 /*
  65  * xattrs can live inside an inode, as part of an external xattr block,
  66  * or inside an xattr bucket, which is the leaf of a tree rooted in an
  67  * xattr block.  Some of the xattr calls, especially the value setting
  68  * functions, want to treat each of these locations as equal.  Let's wrap
  69  * them in a structure that we can pass around instead of raw buffer_heads.
  70  */
  71 struct ocfs2_xattr_value_buf {
  72         struct buffer_head              *vb_bh;
  73         ocfs2_journal_access_func       vb_access;
  74         struct ocfs2_xattr_value_root   *vb_xv;
  75 };
  76
  77 int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
  78                                      struct buffer_head *fe_bh,
  79                                      struct ocfs2_caching_info *ref_ci,
  80                                      struct buffer_head *ref_root_bh,
  81                                      struct ocfs2_cached_dealloc_ctxt *dealloc);
  82 int ocfs2_reflink_xattrs(struct inode *old_inode,
  83                          struct buffer_head *old_bh,
  84                          struct inode *new_inode,
  85                          struct buffer_head *new_bh,
  86                          bool preserve_security);
  87 int ocfs2_init_security_and_acl(struct inode *dir,
  88                                 struct inode *inode,
  89                                 const struct qstr *qstr);
  90 #endif /* OCFS2_XATTR_H */