Home | History | Annotate | Download | only in sys
      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	_SYS_FS_ZFS_FUID_H
     27 #define	_SYS_FS_ZFS_FUID_H
     28 
     29 #pragma ident	"@(#)zfs_fuid.h	1.2	08/01/04 SMI"
     30 
     31 #include <sys/isa_defs.h>
     32 #include <sys/types32.h>
     33 #ifdef _KERNEL
     34 #include <sys/kidmap.h>
     35 #include <sys/sid.h>
     36 #include <sys/dmu.h>
     37 #include <sys/zfs_vfsops.h>
     38 #endif
     39 
     40 #ifdef _KERNEL
     41 typedef struct zfs_fuid_hdl {
     42 	idmap_get_handle_t	*z_hdl;
     43 	boolean_t		z_map_needed; /* is mapping required */
     44 	idmap_stat		z_status; /* needed for kidmap interface */
     45 } zfs_fuid_hdl_t;
     46 
     47 typedef enum {
     48 	ZFS_OWNER,
     49 	ZFS_GROUP,
     50 	ZFS_ACE_USER,
     51 	ZFS_ACE_GROUP
     52 } zfs_fuid_type_t;
     53 
     54 #endif
     55 
     56 
     57 #define	FUID_INDEX(x)	(x >> 32)
     58 #define	FUID_RID(x)	(x & 0xffffffff)
     59 #define	FUID_ENCODE(idx, rid) ((idx << 32) | rid)
     60 /*
     61  * FUIDs cause problems for the intent log
     62  * we need to replay the creation of the FUID,
     63  * but we can't count on the idmapper to be around
     64  * and during replay the FUID index may be different than
     65  * before.  Also, if an ACL has 100 ACEs and 12 different
     66  * domains we don't want to log 100 domain strings, but rather
     67  * just the unique 12.
     68  */
     69 
     70 /*
     71  * The FUIDs in the log will index into
     72  * domain string table and the bottom half will be the rid.
     73  * Used for mapping ephemeral uid/gid during ACL setting to FUIDs
     74  */
     75 typedef struct zfs_fuid {
     76 	list_node_t 	z_next;
     77 	uint64_t 	z_id;		/* uid/gid being converted to fuid */
     78 	uint64_t	z_domidx;	/* index in AVL domain table */
     79 	uint64_t	z_logfuid;	/* index for domain in log */
     80 } zfs_fuid_t;
     81 
     82 /* list of unique domains */
     83 typedef struct zfs_fuid_domain {
     84 	list_node_t	z_next;
     85 	uint64_t	z_domidx;	/* AVL tree idx */
     86 	const char	*z_domain;	/* domain string */
     87 } zfs_fuid_domain_t;
     88 
     89 /*
     90  * FUID information necessary for logging create, setattr, and setacl.
     91  */
     92 typedef struct zfs_fuid_info {
     93 	list_t	z_fuids;
     94 	list_t	z_domains;
     95 	uint64_t z_fuid_owner;
     96 	uint64_t z_fuid_group;
     97 	char **z_domain_table;  /* Used during replay */
     98 	uint32_t z_fuid_cnt;	/* How many fuids in z_fuids */
     99 	uint32_t z_domain_cnt;	/* How many domains */
    100 	size_t	z_domain_str_sz; /* len of domain strings z_domain list */
    101 } zfs_fuid_info_t;
    102 
    103 #ifdef _KERNEL
    104 struct znode;
    105 extern void zfs_fuid_map_id(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t,
    106     uid_t *);
    107 extern void zfs_fuid_destroy(zfsvfs_t *);
    108 extern uint64_t zfs_fuid_create_cred(zfsvfs_t *, uint64_t, zfs_fuid_type_t,
    109     dmu_tx_t *, cred_t *, zfs_fuid_info_t **);
    110 extern uint64_t zfs_fuid_create(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t,
    111     dmu_tx_t *, zfs_fuid_info_t **);
    112 extern void zfs_fuid_queue_map_id(zfsvfs_t *zfsvfs, zfs_fuid_hdl_t *,
    113     uint64_t, cred_t *, zfs_fuid_type_t, uid_t *);
    114 extern void zfs_fuid_map_ids(struct znode *zp, cred_t *cr, uid_t *uid,
    115     uid_t *gid);
    116 extern void zfs_fuid_get_mappings(zfs_fuid_hdl_t *);
    117 extern char *zfs_fuid_find_by_idx(zfsvfs_t *, uint64_t);
    118 int zfs_fuid_find_by_domain(zfsvfs_t *, const char *, char **, dmu_tx_t *);
    119 extern zfs_fuid_info_t *zfs_fuid_info_alloc(void);
    120 extern void zfs_fuid_info_free();
    121 extern boolean_t zfs_groupmember(zfsvfs_t *, uint64_t, cred_t *);
    122 
    123 #endif
    124 
    125 #ifdef	__cplusplus
    126 extern "C" {
    127 #endif
    128 
    129 #ifdef	__cplusplus
    130 }
    131 #endif
    132 
    133 #endif	/* _SYS_FS_ZFS_FUID_H */
    134