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 2010 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 #include <sys/types.h> 30 #ifdef _KERNEL 31 #include <sys/kidmap.h> 32 #include <sys/dmu.h> 33 #include <sys/zfs_vfsops.h> 34 #endif 35 #include <sys/avl.h> 36 #include <sys/list.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 typedef enum { 43 ZFS_OWNER, 44 ZFS_GROUP, 45 ZFS_ACE_USER, 46 ZFS_ACE_GROUP 47 } zfs_fuid_type_t; 48 49 /* 50 * Estimate space needed for one more fuid table entry. 51 * for now assume its current size + 1K 52 */ 53 #define FUID_SIZE_ESTIMATE(z) ((z)->z_fuid_size + (SPA_MINBLOCKSIZE << 1)) 54 55 #define FUID_INDEX(x) ((x) >> 32) 56 #define FUID_RID(x) ((x) & 0xffffffff) 57 #define FUID_ENCODE(idx, rid) (((uint64_t)(idx) << 32) | (rid)) 58 /* 59 * FUIDs cause problems for the intent log 60 * we need to replay the creation of the FUID, 61 * but we can't count on the idmapper to be around 62 * and during replay the FUID index may be different than 63 * before. Also, if an ACL has 100 ACEs and 12 different 64 * domains we don't want to log 100 domain strings, but rather 65 * just the unique 12. 66 */ 67 68 /* 69 * The FUIDs in the log will index into 70 * domain string table and the bottom half will be the rid. 71 * Used for mapping ephemeral uid/gid during ACL setting to FUIDs 72 */ 73 typedef struct zfs_fuid { 74 list_node_t z_next; 75 uint64_t z_id; /* uid/gid being converted to fuid */ 76 uint64_t z_domidx; /* index in AVL domain table */ 77 uint64_t z_logfuid; /* index for domain in log */ 78 } zfs_fuid_t; 79 80 /* list of unique domains */ 81 typedef struct zfs_fuid_domain { 82 list_node_t z_next; 83 uint64_t z_domidx; /* AVL tree idx */ 84 const char *z_domain; /* domain string */ 85 } zfs_fuid_domain_t; 86 87 /* 88 * FUID information necessary for logging create, setattr, and setacl. 89 */ 90 typedef struct zfs_fuid_info { 91 list_t z_fuids; 92 list_t z_domains; 93 uint64_t z_fuid_owner; 94 uint64_t z_fuid_group; 95 char **z_domain_table; /* Used during replay */ 96 uint32_t z_fuid_cnt; /* How many fuids in z_fuids */ 97 uint32_t z_domain_cnt; /* How many domains */ 98 size_t z_domain_str_sz; /* len of domain strings z_domain list */ 99 } zfs_fuid_info_t; 100 101 #ifdef _KERNEL 102 struct znode; 103 extern uid_t zfs_fuid_map_id(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t); 104 extern void zfs_fuid_node_add(zfs_fuid_info_t **, const char *, uint32_t, 105 uint64_t, uint64_t, zfs_fuid_type_t); 106 extern void zfs_fuid_destroy(zfsvfs_t *); 107 extern uint64_t zfs_fuid_create_cred(zfsvfs_t *, zfs_fuid_type_t, 108 cred_t *, zfs_fuid_info_t **); 109 extern uint64_t zfs_fuid_create(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t, 110 zfs_fuid_info_t **); 111 extern void zfs_fuid_map_ids(struct znode *zp, cred_t *cr, 112 uid_t *uid, uid_t *gid); 113 extern zfs_fuid_info_t *zfs_fuid_info_alloc(void); 114 extern void zfs_fuid_info_free(zfs_fuid_info_t *); 115 extern boolean_t zfs_groupmember(zfsvfs_t *, uint64_t, cred_t *); 116 void zfs_fuid_sync(zfsvfs_t *, dmu_tx_t *); 117 extern int zfs_fuid_find_by_domain(zfsvfs_t *, const char *domain, 118 char **retdomain, boolean_t addok); 119 extern const char *zfs_fuid_find_by_idx(zfsvfs_t *zfsvfs, uint32_t idx); 120 extern void zfs_fuid_txhold(zfsvfs_t *zfsvfs, dmu_tx_t *tx); 121 #endif 122 123 char *zfs_fuid_idx_domain(avl_tree_t *, uint32_t); 124 void zfs_fuid_avl_tree_create(avl_tree_t *, avl_tree_t *); 125 uint64_t zfs_fuid_table_load(objset_t *, uint64_t, avl_tree_t *, avl_tree_t *); 126 void zfs_fuid_table_destroy(avl_tree_t *, avl_tree_t *); 127 128 #ifdef __cplusplus 129 } 130 #endif 131 132 #endif /* _SYS_FS_ZFS_FUID_H */ 133