xref: /illumos-gate/usr/src/uts/common/nfs/export.h (revision 1cc55349)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*1cc55349Srmesta  * Common Development and Distribution License (the "License").
6*1cc55349Srmesta  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
217c478bd9Sstevel@tonic-gate /*
22*1cc55349Srmesta  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
237c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
247c478bd9Sstevel@tonic-gate  */
257c478bd9Sstevel@tonic-gate 
267c478bd9Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
277c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
287c478bd9Sstevel@tonic-gate 
297c478bd9Sstevel@tonic-gate #ifndef	_NFS_EXPORT_H
307c478bd9Sstevel@tonic-gate #define	_NFS_EXPORT_H
317c478bd9Sstevel@tonic-gate 
327c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
337c478bd9Sstevel@tonic-gate 
347c478bd9Sstevel@tonic-gate #include <nfs/nfs_sec.h>
35*1cc55349Srmesta #include <nfs/auth.h>
367c478bd9Sstevel@tonic-gate #include <sys/vnode.h>
377c478bd9Sstevel@tonic-gate #include <nfs/nfs4.h>
387c478bd9Sstevel@tonic-gate 
397c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
407c478bd9Sstevel@tonic-gate extern "C" {
417c478bd9Sstevel@tonic-gate #endif
427c478bd9Sstevel@tonic-gate 
437c478bd9Sstevel@tonic-gate /*
447c478bd9Sstevel@tonic-gate  * nfs pseudo flavor number is owned by IANA. Need to make sure the
457c478bd9Sstevel@tonic-gate  * Solaris specific NFS_FLAVOR_NOMAP number will not overlap with any
467c478bd9Sstevel@tonic-gate  * new IANA defined pseudo flavor numbers. The chance for the overlap
477c478bd9Sstevel@tonic-gate  * is very small since the growth of new flavor numbers is expected
487c478bd9Sstevel@tonic-gate  * to be limited.
497c478bd9Sstevel@tonic-gate  */
507c478bd9Sstevel@tonic-gate #define	NFS_FLAVOR_NOMAP	999999	/* no nfs flavor mapping */
517c478bd9Sstevel@tonic-gate 
528a429e7eSms /*
538a429e7eSms  * As duplicate flavors can be passed into exportfs in the arguments, we
548a429e7eSms  * allocate a cleaned up array with non duplicate flavors on the stack.
558a429e7eSms  * So we need to know how much to allocate.
568a429e7eSms  */
578a429e7eSms #define	MAX_FLAVORS		6	/* none, sys, dh, krb5, krb5i krb5p */
588a429e7eSms 
597c478bd9Sstevel@tonic-gate /*
607c478bd9Sstevel@tonic-gate  * Note: exported_lock is currently used to ensure the integrity of
617c478bd9Sstevel@tonic-gate  * the secinfo fields.
627c478bd9Sstevel@tonic-gate  */
637c478bd9Sstevel@tonic-gate struct secinfo {
647c478bd9Sstevel@tonic-gate 	seconfig_t	s_secinfo;	/* /etc/nfssec.conf entry */
657c478bd9Sstevel@tonic-gate 	unsigned int	s_flags;	/* flags (see below) */
668a429e7eSms 	int32_t		s_refcnt;	/* reference count for tracking */
677c478bd9Sstevel@tonic-gate 					/* how many children (self included) */
687c478bd9Sstevel@tonic-gate 					/* use this flavor. */
697c478bd9Sstevel@tonic-gate 	int 		s_window;	/* window */
707c478bd9Sstevel@tonic-gate 	int		s_rootcnt;	/* count of root names */
717c478bd9Sstevel@tonic-gate 	caddr_t		*s_rootnames;	/* array of root names */
727c478bd9Sstevel@tonic-gate 					/* they are strings for AUTH_DES and */
737c478bd9Sstevel@tonic-gate 					/* rpc_gss_principal_t for RPCSEC_GSS */
747c478bd9Sstevel@tonic-gate };
757c478bd9Sstevel@tonic-gate 
767c478bd9Sstevel@tonic-gate #ifdef _SYSCALL32
777c478bd9Sstevel@tonic-gate struct secinfo32 {
787c478bd9Sstevel@tonic-gate 	seconfig32_t	s_secinfo;	/* /etc/nfssec.conf entry */
797c478bd9Sstevel@tonic-gate 	uint32_t	s_flags;	/* flags (see below) */
808a429e7eSms 	int32_t		s_refcnt;	/* reference count for tracking */
817c478bd9Sstevel@tonic-gate 					/* how many children (self included) */
827c478bd9Sstevel@tonic-gate 					/* use this flavor. */
837c478bd9Sstevel@tonic-gate 	int32_t 	s_window;	/* window */
847c478bd9Sstevel@tonic-gate 	int32_t		s_rootcnt;	/* count of root names */
857c478bd9Sstevel@tonic-gate 	caddr32_t	s_rootnames;	/* array of root names */
867c478bd9Sstevel@tonic-gate 					/* they are strings for AUTH_DES and */
877c478bd9Sstevel@tonic-gate 					/* rpc_gss_principal_t for RPCSEC_GSS */
887c478bd9Sstevel@tonic-gate };
897c478bd9Sstevel@tonic-gate #endif /* _SYSCALL32 */
907c478bd9Sstevel@tonic-gate 
917c478bd9Sstevel@tonic-gate /*
927c478bd9Sstevel@tonic-gate  * security negotiation related
937c478bd9Sstevel@tonic-gate  */
947c478bd9Sstevel@tonic-gate 
957c478bd9Sstevel@tonic-gate #define	SEC_QUERY	0x01	/* query sec modes */
967c478bd9Sstevel@tonic-gate 
977c478bd9Sstevel@tonic-gate struct sec_ol {
987c478bd9Sstevel@tonic-gate 	int		sec_flags;	/* security nego flags */
997c478bd9Sstevel@tonic-gate 	uint_t		sec_index;	/* index into sec flavor array */
1007c478bd9Sstevel@tonic-gate };
1017c478bd9Sstevel@tonic-gate 
1027c478bd9Sstevel@tonic-gate /*
1037c478bd9Sstevel@tonic-gate  * Per-mode flags (secinfo.s_flags)
1047c478bd9Sstevel@tonic-gate  */
1057c478bd9Sstevel@tonic-gate #define	M_RO		0x01	/* exported ro to all */
1067c478bd9Sstevel@tonic-gate #define	M_ROL		0x02	/* exported ro to all listed */
1077c478bd9Sstevel@tonic-gate #define	M_RW		0x04	/* exported rw to all */
1087c478bd9Sstevel@tonic-gate #define	M_RWL		0x08	/* exported ro to all listed */
1097c478bd9Sstevel@tonic-gate #define	M_ROOT		0x10	/* root list is defined */
1107c478bd9Sstevel@tonic-gate #define	M_4SEC_EXPORTED	0x20	/* this is an explicitly shared flavor */
1117c478bd9Sstevel@tonic-gate 
1127c478bd9Sstevel@tonic-gate /* invalid secinfo reference count */
1137c478bd9Sstevel@tonic-gate #define	SEC_REF_INVALID(p) ((p)->s_refcnt < 1)
1147c478bd9Sstevel@tonic-gate 
1157c478bd9Sstevel@tonic-gate /* last secinfo reference */
1167c478bd9Sstevel@tonic-gate #define	SEC_REF_LAST(p) ((p)->s_refcnt == 1)
1177c478bd9Sstevel@tonic-gate 
1187c478bd9Sstevel@tonic-gate /* sec flavor explicitly shared for the exported node */
1197c478bd9Sstevel@tonic-gate #define	SEC_REF_EXPORTED(p) ((p)->s_flags & M_4SEC_EXPORTED)
1207c478bd9Sstevel@tonic-gate 
1217c478bd9Sstevel@tonic-gate /* the only reference count left is for referring itself */
1227c478bd9Sstevel@tonic-gate #define	SEC_REF_SELF(p) (SEC_REF_LAST(p) && SEC_REF_EXPORTED(p))
1237c478bd9Sstevel@tonic-gate 
1247c478bd9Sstevel@tonic-gate /*
1257c478bd9Sstevel@tonic-gate  * The export information passed to exportfs() (Version 2)
1267c478bd9Sstevel@tonic-gate  */
1277c478bd9Sstevel@tonic-gate #define	EX_CURRENT_VERSION 2	/* current version of exportdata struct */
1287c478bd9Sstevel@tonic-gate 
1297c478bd9Sstevel@tonic-gate struct exportdata {
1307c478bd9Sstevel@tonic-gate 	int		ex_version;	/* structure version */
1317c478bd9Sstevel@tonic-gate 	char		*ex_path;	/* exported path */
1327c478bd9Sstevel@tonic-gate 	size_t		ex_pathlen;	/* path length */
1337c478bd9Sstevel@tonic-gate 	int		ex_flags;	/* flags */
1347c478bd9Sstevel@tonic-gate 	unsigned int	ex_anon;	/* uid for unauthenticated requests */
1357c478bd9Sstevel@tonic-gate 	int		ex_seccnt;	/* count of security modes */
1367c478bd9Sstevel@tonic-gate 	struct secinfo	*ex_secinfo;	/* security mode info */
1377c478bd9Sstevel@tonic-gate 	char		*ex_index;	/* index file for public filesystem */
1387c478bd9Sstevel@tonic-gate 	char		*ex_log_buffer;	/* path to logging buffer file */
1397c478bd9Sstevel@tonic-gate 	size_t		ex_log_bufferlen;	/* buffer file path len */
1407c478bd9Sstevel@tonic-gate 	char		*ex_tag;	/* tag used to identify log config */
1417c478bd9Sstevel@tonic-gate 	size_t		ex_taglen;	/* tag length */
1427c478bd9Sstevel@tonic-gate };
1437c478bd9Sstevel@tonic-gate 
1447c478bd9Sstevel@tonic-gate #ifdef _SYSCALL32
1457c478bd9Sstevel@tonic-gate struct exportdata32 {
1467c478bd9Sstevel@tonic-gate 	int32_t		ex_version;	/* structure version */
1477c478bd9Sstevel@tonic-gate 	caddr32_t	ex_path;	/* exported path */
1487c478bd9Sstevel@tonic-gate 	int32_t		ex_pathlen;	/* path length */
1497c478bd9Sstevel@tonic-gate 	int32_t		ex_flags;	/* flags */
1507c478bd9Sstevel@tonic-gate 	uint32_t	ex_anon;	/* uid for unauthenticated requests */
1517c478bd9Sstevel@tonic-gate 	int32_t		ex_seccnt;	/* count of security modes */
1527c478bd9Sstevel@tonic-gate 	caddr32_t	ex_secinfo;	/* security mode info */
1537c478bd9Sstevel@tonic-gate 	caddr32_t	ex_index;	/* index file for public filesystem */
1547c478bd9Sstevel@tonic-gate 	caddr32_t	ex_log_buffer;	/* path to logging buffer file */
1557c478bd9Sstevel@tonic-gate 	int32_t		ex_log_bufferlen;	/* buffer file path len */
1567c478bd9Sstevel@tonic-gate 	caddr32_t	ex_tag;		/* tag used to identify log config */
1577c478bd9Sstevel@tonic-gate 	int32_t		ex_taglen;	/* tag length */
1587c478bd9Sstevel@tonic-gate };
1597c478bd9Sstevel@tonic-gate #endif /* _SYSCALL32 */
1607c478bd9Sstevel@tonic-gate 
1617c478bd9Sstevel@tonic-gate /*
1627c478bd9Sstevel@tonic-gate  * exported vfs flags.
1637c478bd9Sstevel@tonic-gate  */
1647c478bd9Sstevel@tonic-gate 
1657c478bd9Sstevel@tonic-gate #define	EX_NOSUID	0x01	/* exported with unsetable set[ug]ids */
1667c478bd9Sstevel@tonic-gate #define	EX_ACLOK	0x02	/* exported with maximal access if acl exists */
1677c478bd9Sstevel@tonic-gate #define	EX_PUBLIC	0x04	/* exported with public filehandle */
1687c478bd9Sstevel@tonic-gate #define	EX_NOSUB	0x08	/* no nfs_getfh or MCL below export point */
1697c478bd9Sstevel@tonic-gate #define	EX_INDEX	0x10	/* exported with index file specified */
1707c478bd9Sstevel@tonic-gate #define	EX_LOG		0x20	/* logging enabled */
1717c478bd9Sstevel@tonic-gate #define	EX_LOG_ALLOPS	0x40	/* logging of all RPC operations enabled */
1727c478bd9Sstevel@tonic-gate 				/* by default only operations which affect */
1737c478bd9Sstevel@tonic-gate 				/* transaction logging are enabled */
1747c478bd9Sstevel@tonic-gate #define	EX_PSEUDO	0x80	/* pseudo filesystem export */
1757c478bd9Sstevel@tonic-gate #ifdef VOLATILE_FH_TEST
1767c478bd9Sstevel@tonic-gate #define	EX_VOLFH	0x100	/* XXX nfsv4 fh may expire anytime */
1777c478bd9Sstevel@tonic-gate #define	EX_VOLRNM	0x200	/* XXX nfsv4 fh expire at rename */
1787c478bd9Sstevel@tonic-gate #define	EX_VOLMIG	0x400	/* XXX nfsv4 fh expire at migration */
1797c478bd9Sstevel@tonic-gate #define	EX_NOEXPOPEN	0x800	/* XXX nfsv4 fh no expire with open */
1807c478bd9Sstevel@tonic-gate #endif /* VOLATILE_FH_TEST */
1817c478bd9Sstevel@tonic-gate 
1827c478bd9Sstevel@tonic-gate #ifdef	_KERNEL
1837c478bd9Sstevel@tonic-gate 
1847c478bd9Sstevel@tonic-gate #define	RPC_IDEMPOTENT	0x1	/* idempotent or not */
1857c478bd9Sstevel@tonic-gate /*
1867c478bd9Sstevel@tonic-gate  * Be very careful about which NFS procedures get the RPC_ALLOWANON bit.
1877c478bd9Sstevel@tonic-gate  * Right now, it this bit is on, we ignore the results of per NFS request
1887c478bd9Sstevel@tonic-gate  * access control.
1897c478bd9Sstevel@tonic-gate  */
1907c478bd9Sstevel@tonic-gate #define	RPC_ALLOWANON	0x2	/* allow anonymous access */
1917c478bd9Sstevel@tonic-gate #define	RPC_MAPRESP	0x4	/* use mapped response buffer */
1927c478bd9Sstevel@tonic-gate #define	RPC_AVOIDWORK	0x8	/* do work avoidance for dups */
1937c478bd9Sstevel@tonic-gate #define	RPC_PUBLICFH_OK	0x10	/* allow use of public filehandle */
1947c478bd9Sstevel@tonic-gate 
1957c478bd9Sstevel@tonic-gate /*
1967c478bd9Sstevel@tonic-gate  * RPC_ALL is an or of all above bits to be used with "don't care"
1977c478bd9Sstevel@tonic-gate  * nfsv4 ops. The flags of an nfsv4 request is the bit-AND of the
1987c478bd9Sstevel@tonic-gate  * per-op flags.
1997c478bd9Sstevel@tonic-gate  */
2007c478bd9Sstevel@tonic-gate #define	RPC_ALL	(RPC_IDEMPOTENT|RPC_ALLOWANON|RPC_AVOIDWORK|RPC_PUBLICFH_OK)
2017c478bd9Sstevel@tonic-gate 
2027c478bd9Sstevel@tonic-gate 
2037c478bd9Sstevel@tonic-gate #ifdef VOLATILE_FH_TEST
2047c478bd9Sstevel@tonic-gate struct ex_vol_rename {
2057c478bd9Sstevel@tonic-gate 	nfs_fh4_fmt_t vrn_fh_fmt;
2067c478bd9Sstevel@tonic-gate 	struct ex_vol_rename *vrn_next;
2077c478bd9Sstevel@tonic-gate };
2087c478bd9Sstevel@tonic-gate #endif /* VOLATILE_FH_TEST */
2097c478bd9Sstevel@tonic-gate 
2107c478bd9Sstevel@tonic-gate /*
2117c478bd9Sstevel@tonic-gate  * An authorization cache entry
2127c478bd9Sstevel@tonic-gate  */
2137c478bd9Sstevel@tonic-gate struct auth_cache {
2147c478bd9Sstevel@tonic-gate 	struct netbuf		auth_addr;
2157c478bd9Sstevel@tonic-gate 	int			auth_flavor;
2167c478bd9Sstevel@tonic-gate 	int			auth_access;
2177c478bd9Sstevel@tonic-gate 	time_t			auth_time;
2187c478bd9Sstevel@tonic-gate 	struct auth_cache	*auth_next;
2197c478bd9Sstevel@tonic-gate };
2207c478bd9Sstevel@tonic-gate 
2217c478bd9Sstevel@tonic-gate #define	AUTH_TABLESIZE	32
2227c478bd9Sstevel@tonic-gate 
2237c478bd9Sstevel@tonic-gate /*
2247c478bd9Sstevel@tonic-gate  * Structure containing log file meta-data.
2257c478bd9Sstevel@tonic-gate  */
2267c478bd9Sstevel@tonic-gate struct log_file {
2277c478bd9Sstevel@tonic-gate 	unsigned int	lf_flags;	/* flags (see below) */
2287c478bd9Sstevel@tonic-gate 	int		lf_writers;	/* outstanding writers */
2297c478bd9Sstevel@tonic-gate 	int		lf_refcnt;	/* references to this struct */
2307c478bd9Sstevel@tonic-gate 	caddr_t		lf_path;	/* buffer file location */
2317c478bd9Sstevel@tonic-gate 	vnode_t		*lf_vp;		/* vnode for the buffer file */
2327c478bd9Sstevel@tonic-gate 	kmutex_t	lf_lock;
2337c478bd9Sstevel@tonic-gate 	kcondvar_t	lf_cv_waiters;
2347c478bd9Sstevel@tonic-gate };
2357c478bd9Sstevel@tonic-gate 
2367c478bd9Sstevel@tonic-gate /*
2377c478bd9Sstevel@tonic-gate  * log_file and log_buffer flags.
2387c478bd9Sstevel@tonic-gate  */
2397c478bd9Sstevel@tonic-gate #define	L_WAITING	0x01		/* flush of in-core data to stable */
2407c478bd9Sstevel@tonic-gate 					/* storage in progress */
2417c478bd9Sstevel@tonic-gate #define	L_PRINTED	0x02		/* error message printed to console */
2427c478bd9Sstevel@tonic-gate #define	L_ERROR		0x04		/* error condition detected */
2437c478bd9Sstevel@tonic-gate 
2447c478bd9Sstevel@tonic-gate /*
2457c478bd9Sstevel@tonic-gate  * The logging buffer information.
2467c478bd9Sstevel@tonic-gate  * This structure may be shared by multiple exportinfo structures,
2477c478bd9Sstevel@tonic-gate  * if they share the same buffer file.
2487c478bd9Sstevel@tonic-gate  * This structure contains the basic information about the buffer, such
2497c478bd9Sstevel@tonic-gate  * as it's location in the filesystem.
2507c478bd9Sstevel@tonic-gate  *
2517c478bd9Sstevel@tonic-gate  * 'lb_lock' protects all the fields in this structure except for 'lb_path',
2527c478bd9Sstevel@tonic-gate  * and 'lb_next'.
2537c478bd9Sstevel@tonic-gate  * 'lb_path' is a write-once/read-many field which needs no locking, it is
2547c478bd9Sstevel@tonic-gate  * set before the structure is linked to any exportinfo structure.
2557c478bd9Sstevel@tonic-gate  * 'lb_next' is protected by the log_buffer_list_lock.
2567c478bd9Sstevel@tonic-gate  */
2577c478bd9Sstevel@tonic-gate struct log_buffer {
2587c478bd9Sstevel@tonic-gate 	unsigned int	lb_flags;	/* L_ONLIST set? */
2597c478bd9Sstevel@tonic-gate 	int		lb_refcnt;	/* references to this struct */
2607c478bd9Sstevel@tonic-gate 	unsigned int	lb_rec_id;	/* used to generate unique id */
2617c478bd9Sstevel@tonic-gate 	caddr_t		lb_path;	/* buffer file pathname */
2627c478bd9Sstevel@tonic-gate 	struct log_file	*lb_logfile;	/* points to log_file structure */
2637c478bd9Sstevel@tonic-gate 	kmutex_t	lb_lock;
2647c478bd9Sstevel@tonic-gate 	struct log_buffer	*lb_next;
2657c478bd9Sstevel@tonic-gate 	kcondvar_t	lb_cv_waiters;
2667c478bd9Sstevel@tonic-gate 	caddr_t		lb_records;	/* linked list of records to write */
2677c478bd9Sstevel@tonic-gate 	int		lb_num_recs;	/* # of records to write */
2687c478bd9Sstevel@tonic-gate 	ssize_t		lb_size_queued; /* number of bytes queued for write */
2697c478bd9Sstevel@tonic-gate };
2707c478bd9Sstevel@tonic-gate 
2717c478bd9Sstevel@tonic-gate #define	LOG_BUFFER_HOLD(lbp)	{ \
2727c478bd9Sstevel@tonic-gate 	mutex_enter(&(lbp)->lb_lock); \
2737c478bd9Sstevel@tonic-gate 	(lbp)->lb_refcnt++; \
2747c478bd9Sstevel@tonic-gate 	mutex_exit(&(lbp)->lb_lock); \
2757c478bd9Sstevel@tonic-gate }
2767c478bd9Sstevel@tonic-gate 
2777c478bd9Sstevel@tonic-gate #define	LOG_BUFFER_RELE(lbp)	{ \
2787c478bd9Sstevel@tonic-gate 	log_buffer_rele(lbp); \
2797c478bd9Sstevel@tonic-gate }
2807c478bd9Sstevel@tonic-gate 
2817c478bd9Sstevel@tonic-gate #define	EXPTABLESIZE	16
2827c478bd9Sstevel@tonic-gate 
2837c478bd9Sstevel@tonic-gate /*
2847c478bd9Sstevel@tonic-gate  * A node associated with an export entry on the
2857c478bd9Sstevel@tonic-gate  * list of exported filesystems.
2867c478bd9Sstevel@tonic-gate  *
2877c478bd9Sstevel@tonic-gate  * exi_count+exi_lock protects an individual exportinfo from being freed
2887c478bd9Sstevel@tonic-gate  * when in use.
2897c478bd9Sstevel@tonic-gate  * You must have the writer lock on exported_lock to add/delete an exportinfo
2907c478bd9Sstevel@tonic-gate  * structure to/from the list.
2917c478bd9Sstevel@tonic-gate  *
2927c478bd9Sstevel@tonic-gate  * exi_volatile_dev maps to VSW_VOLATILEDEV.  It means that the
2937c478bd9Sstevel@tonic-gate  * underlying fs devno can change on each mount.  When set, the server
2947c478bd9Sstevel@tonic-gate  * should not use va_fsid for a GETATTR(FATTR4_FSID) reply.  It must
2957c478bd9Sstevel@tonic-gate  * use exi_fsid because it is guaranteed to be persistent.  This isn't
2967c478bd9Sstevel@tonic-gate  * in any way related to NFS4 volatile filehandles.
2977c478bd9Sstevel@tonic-gate  */
2987c478bd9Sstevel@tonic-gate struct exportinfo {
2997c478bd9Sstevel@tonic-gate 	struct exportdata	exi_export;
3007c478bd9Sstevel@tonic-gate 	fsid_t			exi_fsid;
3017c478bd9Sstevel@tonic-gate 	struct fid		exi_fid;
3027c478bd9Sstevel@tonic-gate 	struct exportinfo	*exi_hash;
3037c478bd9Sstevel@tonic-gate 	fhandle_t		exi_fh;
3047c478bd9Sstevel@tonic-gate 	krwlock_t		exi_cache_lock;
3057c478bd9Sstevel@tonic-gate 	kmutex_t		exi_lock;
3067c478bd9Sstevel@tonic-gate 	uint_t			exi_count;
3077c478bd9Sstevel@tonic-gate 	vnode_t			*exi_vp;
3087c478bd9Sstevel@tonic-gate 	vnode_t			*exi_dvp;
3097c478bd9Sstevel@tonic-gate 	struct auth_cache	*exi_cache[AUTH_TABLESIZE];
3107c478bd9Sstevel@tonic-gate 	struct log_buffer	*exi_logbuffer;
3117c478bd9Sstevel@tonic-gate 	struct exp_visible	*exi_visible;
3127c478bd9Sstevel@tonic-gate 	unsigned		exi_volatile_dev:1;
3137c478bd9Sstevel@tonic-gate #ifdef VOLATILE_FH_TEST
3147c478bd9Sstevel@tonic-gate 	uint32_t		exi_volatile_id;
3157c478bd9Sstevel@tonic-gate 	struct ex_vol_rename	*exi_vol_rename;
3167c478bd9Sstevel@tonic-gate 	kmutex_t		exi_vol_rename_lock;
3177c478bd9Sstevel@tonic-gate #endif /* VOLATILE_FH_TEST */
3187c478bd9Sstevel@tonic-gate };
3197c478bd9Sstevel@tonic-gate 
3207c478bd9Sstevel@tonic-gate /*
3217c478bd9Sstevel@tonic-gate  * exp_visible is a visible list per filesystem. It is for filesystems
3227c478bd9Sstevel@tonic-gate  * that may need a limited view of its contents. A pseudo export and
3237c478bd9Sstevel@tonic-gate  * a real export at the mount point (VROOT) which has a subtree shared
3247c478bd9Sstevel@tonic-gate  * has a visible list.
3257c478bd9Sstevel@tonic-gate  *
3267c478bd9Sstevel@tonic-gate  * The exi_visible field is NULL for normal, non=pseudo filesystems
3277c478bd9Sstevel@tonic-gate  * which do not have any subtree exported. If the field is non-null,
3287c478bd9Sstevel@tonic-gate  * it points to a list of visible entries, identified by vis_fid and/or
3297c478bd9Sstevel@tonic-gate  * vis_ino. The presence of a "visible" list means that if this export
3307c478bd9Sstevel@tonic-gate  * can only have a limited view, it can only view the entries in the
3317c478bd9Sstevel@tonic-gate  * exp_visible list. The directories in the fid list comprise paths that
3327c478bd9Sstevel@tonic-gate  * lead to exported directories.
3337c478bd9Sstevel@tonic-gate  *
3347c478bd9Sstevel@tonic-gate  * The vis_count field records the number of paths in this filesystem
3357c478bd9Sstevel@tonic-gate  * that use this directory. The vis_exported field is non-zero if the
3367c478bd9Sstevel@tonic-gate  * entry is an exported directory (leaf node).
3377c478bd9Sstevel@tonic-gate  */
3387c478bd9Sstevel@tonic-gate 
3397c478bd9Sstevel@tonic-gate struct exp_visible {
3407c478bd9Sstevel@tonic-gate 	vnode_t			*vis_vp;
3417c478bd9Sstevel@tonic-gate 	fid_t			vis_fid;
3427c478bd9Sstevel@tonic-gate 	u_longlong_t		vis_ino;
3437c478bd9Sstevel@tonic-gate 	int			vis_count;
3447c478bd9Sstevel@tonic-gate 	int			vis_exported;
3457c478bd9Sstevel@tonic-gate 	struct exp_visible	*vis_next;
3467c478bd9Sstevel@tonic-gate };
3477c478bd9Sstevel@tonic-gate 
3487c478bd9Sstevel@tonic-gate #define	PSEUDO(exi)	((exi)->exi_export.ex_flags & EX_PSEUDO)
3497c478bd9Sstevel@tonic-gate 
3507c478bd9Sstevel@tonic-gate #define	EQFSID(fsidp1, fsidp2)	\
3517c478bd9Sstevel@tonic-gate 	(((fsidp1)->val[0] == (fsidp2)->val[0]) && \
3527c478bd9Sstevel@tonic-gate 	    ((fsidp1)->val[1] == (fsidp2)->val[1]))
3537c478bd9Sstevel@tonic-gate 
3547c478bd9Sstevel@tonic-gate #define	EQFID(fidp1, fidp2)	\
3557c478bd9Sstevel@tonic-gate 	((fidp1)->fid_len == (fidp2)->fid_len && \
3567c46fb7fSek 	    bcmp((char *)(fidp1)->fid_data, (char *)(fidp2)->fid_data, \
3577c478bd9Sstevel@tonic-gate 	    (uint_t)(fidp1)->fid_len) == 0)
3587c478bd9Sstevel@tonic-gate 
3597c478bd9Sstevel@tonic-gate #define	exportmatch(exi, fsid, fid)	\
3607c478bd9Sstevel@tonic-gate 	(EQFSID(&(exi)->exi_fsid, (fsid)) && EQFID(&(exi)->exi_fid, (fid)))
3617c478bd9Sstevel@tonic-gate 
3627c478bd9Sstevel@tonic-gate /*
3637c478bd9Sstevel@tonic-gate  * Returns true iff exported filesystem is read-only to the given host.
3647c478bd9Sstevel@tonic-gate  *
3657c478bd9Sstevel@tonic-gate  * Note:  this macro should be as fast as possible since it's called
3667c478bd9Sstevel@tonic-gate  * on each NFS modification request.
3677c478bd9Sstevel@tonic-gate  */
3687c478bd9Sstevel@tonic-gate #define	rdonly(exi, req)  (nfsauth_access(exi, req) & NFSAUTH_RO)
3697c478bd9Sstevel@tonic-gate #define	rdonly4(exi, vp, req)  \
3707c478bd9Sstevel@tonic-gate 	(vn_is_readonly(vp) || \
3717c478bd9Sstevel@tonic-gate 	    (nfsauth4_access(exi, vp, req) & (NFSAUTH_RO | NFSAUTH_LIMITED)))
3727c478bd9Sstevel@tonic-gate 
3737c478bd9Sstevel@tonic-gate extern int	nfsauth4_access(struct exportinfo *, vnode_t *,
3747c478bd9Sstevel@tonic-gate 				struct svc_req *);
3757c478bd9Sstevel@tonic-gate extern int	nfsauth4_secinfo_access(struct exportinfo *,
3767c478bd9Sstevel@tonic-gate 				struct svc_req *, int, int);
3777c478bd9Sstevel@tonic-gate extern int	nfs_fhhash(fsid_t *, fid_t *);
3787c478bd9Sstevel@tonic-gate extern int	nfs_fhbcmp(char *, char *, int);
3797c478bd9Sstevel@tonic-gate extern int	nfs_exportinit(void);
3807c478bd9Sstevel@tonic-gate extern void	nfs_exportfini(void);
3817c478bd9Sstevel@tonic-gate extern int	chk_clnt_sec(struct exportinfo *, struct svc_req *req);
3827c478bd9Sstevel@tonic-gate extern int	makefh(fhandle_t *, struct vnode *, struct exportinfo *);
3837c478bd9Sstevel@tonic-gate extern int	makefh_ol(fhandle_t *, struct exportinfo *, uint_t);
3847c478bd9Sstevel@tonic-gate extern int	makefh3(nfs_fh3 *, struct vnode *, struct exportinfo *);
3857c478bd9Sstevel@tonic-gate extern int	makefh3_ol(nfs_fh3 *, struct exportinfo *, uint_t);
3867c478bd9Sstevel@tonic-gate extern vnode_t *nfs_fhtovp(fhandle_t *, struct exportinfo *);
3877c478bd9Sstevel@tonic-gate extern vnode_t *nfs3_fhtovp(nfs_fh3 *, struct exportinfo *);
3887c478bd9Sstevel@tonic-gate extern vnode_t *lm_fhtovp(fhandle_t *fh);
3897c478bd9Sstevel@tonic-gate extern vnode_t *lm_nfs3_fhtovp(nfs_fh3 *fh);
3907c478bd9Sstevel@tonic-gate extern struct	exportinfo *checkexport(fsid_t *, struct fid *);
3917c478bd9Sstevel@tonic-gate extern struct	exportinfo *checkexport4(fsid_t *, struct fid *, vnode_t *vp);
3927c478bd9Sstevel@tonic-gate extern void	exi_rele(struct exportinfo *);
3937c478bd9Sstevel@tonic-gate extern struct exportinfo *nfs_vptoexi(vnode_t *, vnode_t *, cred_t *, int *,
3947c478bd9Sstevel@tonic-gate     int *, bool_t);
3957c478bd9Sstevel@tonic-gate extern int	nfs_check_vpexi(vnode_t *, vnode_t *, cred_t *,
3967c478bd9Sstevel@tonic-gate 			struct exportinfo **);
3977c478bd9Sstevel@tonic-gate extern void	export_link(struct exportinfo *);
3987c478bd9Sstevel@tonic-gate extern int	export_unlink(fsid_t *, fid_t *, vnode_t *,
3997c478bd9Sstevel@tonic-gate 			struct exportinfo **);
4007c478bd9Sstevel@tonic-gate extern vnode_t *untraverse(vnode_t *);
4017c478bd9Sstevel@tonic-gate 
4027c478bd9Sstevel@tonic-gate /*
4037c478bd9Sstevel@tonic-gate  * Functions that handle the NFSv4 server namespace
4047c478bd9Sstevel@tonic-gate  */
4057c478bd9Sstevel@tonic-gate extern int	treeclimb_export(struct exportinfo *);
4067c478bd9Sstevel@tonic-gate extern int	treeclimb_unexport(struct exportinfo *);
4077c478bd9Sstevel@tonic-gate extern int	nfs_visible(struct exportinfo *, vnode_t *, int *);
4087c478bd9Sstevel@tonic-gate extern int	nfs_visible_inode(struct exportinfo *, ino64_t, int *);
4097c478bd9Sstevel@tonic-gate extern int	has_visible(struct exportinfo *, vnode_t *);
4107c478bd9Sstevel@tonic-gate extern void	free_visible(struct exp_visible *);
4117c478bd9Sstevel@tonic-gate extern int	nfs_exported(struct exportinfo *, vnode_t *);
4127c478bd9Sstevel@tonic-gate extern int	pseudo_exportfs(vnode_t *, struct exp_visible *,
4137c478bd9Sstevel@tonic-gate 					struct exportdata *);
4147c478bd9Sstevel@tonic-gate extern int	vop_fid_pseudo(vnode_t *, fid_t *fidp);
4157c478bd9Sstevel@tonic-gate extern int	nfs4_vget_pseudo(struct exportinfo *, vnode_t **, fid_t *);
4167c478bd9Sstevel@tonic-gate /*
4177c478bd9Sstevel@tonic-gate  * Functions that handle the NFSv4 server namespace security flavors
4187c478bd9Sstevel@tonic-gate  * information.
4197c478bd9Sstevel@tonic-gate  */
4207c478bd9Sstevel@tonic-gate extern void	srv_secinfo_exp2pseu(struct exportdata *, struct exportdata *);
4217c478bd9Sstevel@tonic-gate 
4227c478bd9Sstevel@tonic-gate /*
4237c478bd9Sstevel@tonic-gate  * "public" and default (root) location for public filehandle
4247c478bd9Sstevel@tonic-gate  */
4257c478bd9Sstevel@tonic-gate extern struct exportinfo *exi_public, *exi_root;
4267c478bd9Sstevel@tonic-gate extern fhandle_t nullfh2;	/* for comparing V2 filehandles */
4277c478bd9Sstevel@tonic-gate extern krwlock_t exported_lock;
4287c478bd9Sstevel@tonic-gate extern struct exportinfo *exptable[];
4297c478bd9Sstevel@tonic-gate 
4307c478bd9Sstevel@tonic-gate /*
4317c478bd9Sstevel@tonic-gate  * Two macros for identifying public filehandles.
4327c478bd9Sstevel@tonic-gate  * A v2 public filehandle is 32 zero bytes.
4337c478bd9Sstevel@tonic-gate  * A v3 public filehandle is zero length.
4347c478bd9Sstevel@tonic-gate  */
4357c478bd9Sstevel@tonic-gate #define	PUBLIC_FH2(fh) \
4367c478bd9Sstevel@tonic-gate 	((fh)->fh_fsid.val[1] == 0 && \
4377c478bd9Sstevel@tonic-gate 	bcmp((fh), &nullfh2, sizeof (fhandle_t)) == 0)
4387c478bd9Sstevel@tonic-gate 
4397c478bd9Sstevel@tonic-gate #define	PUBLIC_FH3(fh) \
4407c478bd9Sstevel@tonic-gate 	((fh)->fh3_length == 0)
4417c478bd9Sstevel@tonic-gate 
4427c478bd9Sstevel@tonic-gate extern int	makefh4(nfs_fh4 *, struct vnode *, struct exportinfo *);
4437c478bd9Sstevel@tonic-gate extern vnode_t *nfs4_fhtovp(nfs_fh4 *, struct exportinfo *, nfsstat4 *);
4447c478bd9Sstevel@tonic-gate 
4457c478bd9Sstevel@tonic-gate #endif /* _KERNEL */
4467c478bd9Sstevel@tonic-gate 
4477c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
4487c478bd9Sstevel@tonic-gate }
4497c478bd9Sstevel@tonic-gate #endif
4507c478bd9Sstevel@tonic-gate 
4517c478bd9Sstevel@tonic-gate #endif	/* _NFS_EXPORT_H */
452