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Linux/fs/ocfs2/xattr.h

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  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 */
 91 

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