diff options
Diffstat (limited to 'sys/contrib/openzfs/include/sys/zfs_fuid.h')
-rw-r--r-- | sys/contrib/openzfs/include/sys/zfs_fuid.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/include/sys/zfs_fuid.h b/sys/contrib/openzfs/include/sys/zfs_fuid.h new file mode 100644 index 000000000000..b5b37db29468 --- /dev/null +++ b/sys/contrib/openzfs/include/sys/zfs_fuid.h @@ -0,0 +1,132 @@ +/* + * 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 */ |