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      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 2008 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #ifndef _NFS4_IDMAP_IMPL_H
     27 #define	_NFS4_IDMAP_IMPL_H
     28 
     29 #include <sys/list.h>
     30 #include <sys/door.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	256
     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