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 extern bool
42 nfs_stream_decode_acl(struct xdr_stream *xdr, unsigned int *aclcnt,
43 struct posix_acl **pacl);
44 extern bool
45 nfs_stream_encode_acl(struct xdr_stream *xdr, struct inode *inode,
46 struct posix_acl *acl, int encode_entries, int typeflag);
47
48 #endif /* __LINUX_NFSACL_H */
49
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