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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_FS_ZFS_FUID_H
#define _SYS_FS_ZFS_FUID_H
#ifdef _KERNEL
#include <sys/sid.h>
#include <sys/dmu.h>
#include <sys/zfs_vfsops.h>
#endif
#include <sys/avl.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
ZFS_OWNER,
ZFS_GROUP,
ZFS_ACE_USER,
ZFS_ACE_GROUP
} zfs_fuid_type_t;
/*
* Estimate space needed for one more fuid table entry.
* for now assume its current size + 1K
*/
#define FUID_SIZE_ESTIMATE(z) ((z)->z_fuid_size + (SPA_MINBLOCKSIZE << 1))
#define FUID_INDEX(x) ((x) >> 32)
#define FUID_RID(x) ((x) & 0xffffffff)
#define FUID_ENCODE(idx, rid) (((uint64_t)(idx) << 32) | (rid))
/*
* FUIDs cause problems for the intent log
* we need to replay the creation of the FUID,
* but we can't count on the idmapper to be around
* and during replay the FUID index may be different than
* before. Also, if an ACL has 100 ACEs and 12 different
* domains we don't want to log 100 domain strings, but rather
* just the unique 12.
*/
/*
* The FUIDs in the log will index into
* domain string table and the bottom half will be the rid.
* Used for mapping ephemeral uid/gid during ACL setting to FUIDs
*/
typedef struct zfs_fuid {
list_node_t z_next;
uint64_t z_id; /* uid/gid being converted to fuid */
uint64_t z_domidx; /* index in AVL domain table */
uint64_t z_logfuid; /* index for domain in log */
} zfs_fuid_t;
/* list of unique domains */
typedef struct zfs_fuid_domain {
list_node_t z_next;
uint64_t z_domidx; /* AVL tree idx */
const char *z_domain; /* domain string */
} zfs_fuid_domain_t;
/*
* FUID information necessary for logging create, setattr, and setacl.
*/
typedef struct zfs_fuid_info {
list_t z_fuids;
list_t z_domains;
uint64_t z_fuid_owner;
uint64_t z_fuid_group;
char **z_domain_table; /* Used during replay */
uint32_t z_fuid_cnt; /* How many fuids in z_fuids */
uint32_t z_domain_cnt; /* How many domains */
size_t z_domain_str_sz; /* len of domain strings z_domain list */
} zfs_fuid_info_t;
#ifdef _KERNEL
struct znode;
extern uid_t zfs_fuid_map_id(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t);
extern void zfs_fuid_node_add(zfs_fuid_info_t **, const char *, uint32_t,
uint64_t, uint64_t, zfs_fuid_type_t);
extern void zfs_fuid_destroy(zfsvfs_t *);
extern uint64_t zfs_fuid_create_cred(zfsvfs_t *, zfs_fuid_type_t,
cred_t *, zfs_fuid_info_t **);
extern uint64_t zfs_fuid_create(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t,
zfs_fuid_info_t **);
extern void zfs_fuid_map_ids(struct znode *zp, cred_t *cr,
uid_t *uid, uid_t *gid);
extern zfs_fuid_info_t *zfs_fuid_info_alloc(void);
extern void zfs_fuid_info_free(zfs_fuid_info_t *);
extern boolean_t zfs_groupmember(zfsvfs_t *, uint64_t, cred_t *);
void zfs_fuid_sync(zfsvfs_t *, dmu_tx_t *);
extern int zfs_fuid_find_by_domain(zfsvfs_t *, const char *domain,
char **retdomain, boolean_t addok);
extern const char *zfs_fuid_find_by_idx(zfsvfs_t *zfsvfs, uint32_t idx);
extern void zfs_fuid_txhold(zfsvfs_t *zfsvfs, dmu_tx_t *tx);
extern int zfs_id_to_fuidstr(zfsvfs_t *zfsvfs, const char *domain, uid_t rid,
char *buf, size_t len, boolean_t addok);
#endif
char *zfs_fuid_idx_domain(avl_tree_t *, uint32_t);
void zfs_fuid_avl_tree_create(avl_tree_t *, avl_tree_t *);
uint64_t zfs_fuid_table_load(objset_t *, uint64_t, avl_tree_t *, avl_tree_t *);
void zfs_fuid_table_destroy(avl_tree_t *, avl_tree_t *);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_FS_ZFS_FUID_H */
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