xref: /illumos-gate/usr/src/uts/common/nfs/nfs4_idmap_impl.h (revision 0616fd7f2fe52dfe4b6189a7f510069a5b2aed73)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
23  */
24 
25 #ifndef _NFS4_IDMAP_IMPL_H
26 #define	_NFS4_IDMAP_IMPL_H
27 
28 #include <sys/list.h>
29 #include <sys/door.h>
30 #include <sys/pkp_hash.h>
31 
32 /*
33  * This is a private header file.  Applications should not directly include
34  * this file.
35  */
36 
37 #ifdef	__cplusplus
38 extern "C" {
39 #endif
40 
41 /*
42  * Cache Entry Definitions
43  */
44 #define	NFSID_CACHE_ANCHORS	PKP_HASH_SIZE
45 
46 typedef struct nfsidmap {
47 	struct nfsidmap *id_chain[2];	/* must be first */
48 	time_t		 id_time;	/* time stamp */
49 	uid_t		 id_no;		/* uid/gid */
50 	utf8string	 id_str;	/* user@domain string */
51 } nfsidmap_t;
52 
53 #define	id_forw			id_chain[0]
54 #define	id_back			id_chain[1]
55 #define	id_len			id_str.utf8string_len
56 #define	id_val			id_str.utf8string_val
57 
58 typedef struct nfsidhq {
59 	union {
60 		struct nfsidhq	*hq_head[2];	/* for empty queue */
61 		struct nfsidmap *hq_chain[2];	/* for LRU list */
62 	} hq_link;
63 	kmutex_t	hq_lock;		/* protects hash queue */
64 } nfsidhq_t;
65 
66 #define	hq_que_forw		hq_link.hq_head[0]
67 #define	hq_que_back		hq_link.hq_head[1]
68 #define	hq_lru_forw		hq_link.hq_chain[0]
69 #define	hq_lru_back		hq_link.hq_chain[1]
70 
71 typedef struct {
72 	const char	*name;		/* cache name */
73 	nfsidhq_t	*table;		/* hash table */
74 	/*
75 	 * Since we need to know the status of nfsmapid from random functions
76 	 * that deal with idmap caches, we keep a pointer to the relevant fields
77 	 * in the zone's globals so we don't have to keep passing them around.
78 	 */
79 	door_handle_t		*nfsidmap_daemon_dh;
80 } idmap_cache_info_t;
81 
82 typedef enum hash_stat { HQ_HASH_HINT, HQ_HASH_FIND } hash_stat;
83 
84 /*
85  * Per-zone modular globals
86  */
87 struct nfsidmap_globals {
88 	list_node_t		nig_link; /* linkage into global list */
89 	enum clnt_stat		nig_last_stat;	/* status of last RPC call */
90 	int			nig_msg_done;	/* have we printed a message? */
91 	idmap_cache_info_t	u2s_ci;	/* table mapping uid-to-string */
92 	idmap_cache_info_t	s2u_ci;	/* table mapping string-to-uid */
93 	idmap_cache_info_t	g2s_ci;	/* table mapping groupid-to-string */
94 	idmap_cache_info_t	s2g_ci;	/* table mapping string-to-groupid */
95 	pid_t			nfsidmap_pid;
96 	kmutex_t		nfsidmap_daemon_lock;
97 	/*
98 	 * nfsidmap_daemon_lock protects the following:
99 	 * 	nfsidmap_daemon_dh
100 	 */
101 	door_handle_t		nfsidmap_daemon_dh;
102 };
103 
104 #ifdef	__cplusplus
105 }
106 #endif
107 
108 #endif /* _NFS4_IDMAP_IMPL_H */
109