/* SPDX-License-Identifier: GPL-2.0 */

  #include <linux/init.h>
  #include <linux/posix_acl.h>

  
  #define REISERFS_ACL_VERSION	0x0001
  
  typedef struct {

  	__le16 e_tag;
  	__le16 e_perm;
  	__le32 e_id;

  } reiserfs_acl_entry;
  
  typedef struct {

  	__le16 e_tag;
  	__le16 e_perm;

  } reiserfs_acl_entry_short;
  
  typedef struct {

  	__le32 a_version;

  } reiserfs_acl_header;
  
  static inline size_t reiserfs_acl_size(int count)
  {
  	if (count <= 4) {
  		return sizeof(reiserfs_acl_header) +

  		    count * sizeof(reiserfs_acl_entry_short);

  	} else {
  		return sizeof(reiserfs_acl_header) +

  		    4 * sizeof(reiserfs_acl_entry_short) +
  		    (count - 4) * sizeof(reiserfs_acl_entry);

  	}
  }
  
  static inline int reiserfs_acl_count(size_t size)
  {
  	ssize_t s;
  	size -= sizeof(reiserfs_acl_header);
  	s = size - 4 * sizeof(reiserfs_acl_entry_short);
  	if (s < 0) {
  		if (size % sizeof(reiserfs_acl_entry_short))
  			return -1;
  		return size / sizeof(reiserfs_acl_entry_short);
  	} else {
  		if (s % sizeof(reiserfs_acl_entry))
  			return -1;
  		return s / sizeof(reiserfs_acl_entry) + 4;
  	}
  }

  #ifdef CONFIG_REISERFS_FS_POSIX_ACL

  struct posix_acl *reiserfs_get_acl(struct inode *inode, int type);

  int reiserfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);

  int reiserfs_acl_chmod(struct inode *inode);

  int reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
  				 struct inode *dir, struct dentry *dentry,

  				 struct inode *inode);
  int reiserfs_cache_default_acl(struct inode *dir);

  #else

  #define reiserfs_cache_default_acl(inode) 0

  #define reiserfs_get_acl NULL

  #define reiserfs_set_acl NULL

  static inline int reiserfs_acl_chmod(struct inode *inode)

  {

  	return 0;

  }
  
  static inline int

  reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
  			     const struct inode *dir, struct dentry *dentry,

  			     struct inode *inode)

  {

  	return 0;

  }

  #endif