1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * File: linux/nfsacl.h
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * (C) 2003 Andreas Gruenbacher <agruen@suse.de>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun #ifndef __LINUX_NFSACL_H
8*4882a593Smuzhiyun #define __LINUX_NFSACL_H
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <linux/posix_acl.h>
12*4882a593Smuzhiyun #include <linux/sunrpc/xdr.h>
13*4882a593Smuzhiyun #include <uapi/linux/nfsacl.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun /* Maximum number of ACL entries over NFS */
16*4882a593Smuzhiyun #define NFS_ACL_MAX_ENTRIES 1024
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #define NFSACL_MAXWORDS (2*(2+3*NFS_ACL_MAX_ENTRIES))
19*4882a593Smuzhiyun #define NFSACL_MAXPAGES ((2*(8+12*NFS_ACL_MAX_ENTRIES) + PAGE_SIZE-1) \
20*4882a593Smuzhiyun >> PAGE_SHIFT)
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #define NFS_ACL_MAX_ENTRIES_INLINE (5)
23*4882a593Smuzhiyun #define NFS_ACL_INLINE_BUFSIZE ((2*(2+3*NFS_ACL_MAX_ENTRIES_INLINE)) << 2)
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun static inline unsigned int
nfsacl_size(struct posix_acl * acl_access,struct posix_acl * acl_default)26*4882a593Smuzhiyun nfsacl_size(struct posix_acl *acl_access, struct posix_acl *acl_default)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun unsigned int w = 16;
29*4882a593Smuzhiyun w += max(acl_access ? (int)acl_access->a_count : 3, 4) * 12;
30*4882a593Smuzhiyun if (acl_default)
31*4882a593Smuzhiyun w += max((int)acl_default->a_count, 4) * 12;
32*4882a593Smuzhiyun return w;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun extern int
36*4882a593Smuzhiyun nfsacl_encode(struct xdr_buf *buf, unsigned int base, struct inode *inode,
37*4882a593Smuzhiyun struct posix_acl *acl, int encode_entries, int typeflag);
38*4882a593Smuzhiyun extern int
39*4882a593Smuzhiyun nfsacl_decode(struct xdr_buf *buf, unsigned int base, unsigned int *aclcnt,
40*4882a593Smuzhiyun struct posix_acl **pacl);
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun #endif /* __LINUX_NFSACL_H */
43