include/linux/nfsacl.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * File: linux/nfsacl.h
   4  *
   5  * (C) 2003 Andreas Gruenbacher <agruen@suse.de>
   6  */
   7 #ifndef __LINUX_NFSACL_H
   8 #define __LINUX_NFSACL_H
   9
  10
  11 #include <linux/posix_acl.h>
  12 #include <linux/sunrpc/xdr.h>
  13 #include <uapi/linux/nfsacl.h>
  14
  15 /* Maximum number of ACL entries over NFS */
  16 #define NFS_ACL_MAX_ENTRIES     1024
  17
  18 #define NFSACL_MAXWORDS         (2*(2+3*NFS_ACL_MAX_ENTRIES))
  19 #define NFSACL_MAXPAGES         ((2*(8+12*NFS_ACL_MAX_ENTRIES) + PAGE_SIZE-1) \
  20                                  >> PAGE_SHIFT)
  21
  22 #define NFS_ACL_MAX_ENTRIES_INLINE      (5)
  23 #define NFS_ACL_INLINE_BUFSIZE  ((2*(2+3*NFS_ACL_MAX_ENTRIES_INLINE)) << 2)
  24
  25 static inline unsigned int
  26 nfsacl_size(struct posix_acl *acl_access, struct posix_acl *acl_default)
  27 {
  28         unsigned int w = 16;
  29         w += max(acl_access ? (int)acl_access->a_count : 3, 4) * 12;
  30         if (acl_default)
  31                 w += max((int)acl_default->a_count, 4) * 12;
  32         return w;
  33 }
  34
  35 extern int
  36 nfsacl_encode(struct xdr_buf *buf, unsigned int base, struct inode *inode,
  37               struct posix_acl *acl, int encode_entries, int typeflag);
  38 extern int
  39 nfsacl_decode(struct xdr_buf *buf, unsigned int base, unsigned int *aclcnt,
  40               struct posix_acl **pacl);
  41
  42 #endif  /* __LINUX_NFSACL_H */