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
nfsacl_size(struct posix_acl * acl_access,struct posix_acl * acl_default)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 */
43