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 * Copyright 2017 Nexenta Systems, Inc. All rights reserved. 26 */ 27 28 #ifndef _SYS_FS_ZFS_FUID_H 29 #define _SYS_FS_ZFS_FUID_H 30 31 #ifdef _KERNEL 32 #include <sys/kidmap.h> 33 #include <sys/sid.h> 34 #include <sys/dmu.h> 35 #include <sys/zfs_vfsops.h> 36 #endif 37 #include <sys/avl.h> 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 typedef enum { 44 ZFS_OWNER, 45 ZFS_GROUP, 46 ZFS_ACE_USER, 47 ZFS_ACE_GROUP 48 } zfs_fuid_type_t; 49 50 /* 51 * Estimate space needed for one more fuid table entry. 52 * for now assume its current size + 1K 53 */ 54 #define FUID_SIZE_ESTIMATE(z) ((z)->z_fuid_size + (SPA_MINBLOCKSIZE << 1)) 55 56 #define FUID_INDEX(x) ((x) >> 32) 57 #define FUID_RID(x) ((x) & 0xffffffff) 58 #define FUID_ENCODE(idx, rid) (((uint64_t)(idx) << 32) | (rid)) 59 /* 60 * FUIDs cause problems for the intent log 61 * we need to replay the creation of the FUID, 62 * but we can't count on the idmapper to be around 63 * and during replay the FUID index may be different than 64 * before. Also, if an ACL has 100 ACEs and 12 different 65 * domains we don't want to log 100 domain strings, but rather 66 * just the unique 12. 67 */ 68 69 /* 70 * The FUIDs in the log will index into 71 * domain string table and the bottom half will be the rid. 72 * Used for mapping ephemeral uid/gid during ACL setting to FUIDs 73 */ 74 typedef struct zfs_fuid { 75 list_node_t z_next; 76 uint64_t z_id; /* uid/gid being converted to fuid */ 77 uint64_t z_domidx; /* index in AVL domain table */ 78 uint64_t z_logfuid; /* index for domain in log */ 79 } zfs_fuid_t; 80 81 /* list of unique domains */ 82 typedef struct zfs_fuid_domain { 83 list_node_t z_next; 84 uint64_t z_domidx; /* AVL tree idx */ 85 const char *z_domain; /* domain string */ 86 } zfs_fuid_domain_t; 87 88 /* 89 * FUID information necessary for logging create, setattr, and setacl. 90 */ 91 typedef struct zfs_fuid_info { 92 list_t z_fuids; 93 list_t z_domains; 94 uint64_t z_fuid_owner; 95 uint64_t z_fuid_group; 96 char **z_domain_table; /* Used during replay */ 97 uint32_t z_fuid_cnt; /* How many fuids in z_fuids */ 98 uint32_t z_domain_cnt; /* How many domains */ 99 size_t z_domain_str_sz; /* len of domain strings z_domain list */ 100 } zfs_fuid_info_t; 101 102 #ifdef _KERNEL 103 struct znode; 104 extern uid_t zfs_fuid_map_id(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t); 105 extern void zfs_fuid_node_add(zfs_fuid_info_t **, const char *, uint32_t, 106 uint64_t, uint64_t, zfs_fuid_type_t); 107 extern void zfs_fuid_destroy(zfsvfs_t *); 108 extern uint64_t zfs_fuid_create_cred(zfsvfs_t *, zfs_fuid_type_t, 109 cred_t *, zfs_fuid_info_t **); 110 extern uint64_t zfs_fuid_create(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t, 111 zfs_fuid_info_t **); 112 extern void zfs_fuid_map_ids(struct znode *zp, cred_t *cr, 113 uid_t *uid, uid_t *gid); 114 extern zfs_fuid_info_t *zfs_fuid_info_alloc(void); 115 extern void zfs_fuid_info_free(zfs_fuid_info_t *); 116 extern boolean_t zfs_user_in_cred(zfsvfs_t *, uint64_t, cred_t *); 117 extern boolean_t zfs_groupmember(zfsvfs_t *, uint64_t, cred_t *); 118 void zfs_fuid_sync(zfsvfs_t *, dmu_tx_t *); 119 extern int zfs_fuid_find_by_domain(zfsvfs_t *, const char *domain, 120 char **retdomain, boolean_t addok); 121 extern const char *zfs_fuid_find_by_idx(zfsvfs_t *zfsvfs, uint32_t idx); 122 extern void zfs_fuid_txhold(zfsvfs_t *zfsvfs, dmu_tx_t *tx); 123 #endif 124 125 char *zfs_fuid_idx_domain(avl_tree_t *, uint32_t); 126 void zfs_fuid_avl_tree_create(avl_tree_t *, avl_tree_t *); 127 uint64_t zfs_fuid_table_load(objset_t *, uint64_t, avl_tree_t *, avl_tree_t *); 128 void zfs_fuid_table_destroy(avl_tree_t *, avl_tree_t *); 129 130 #ifdef __cplusplus 131 } 132 #endif 133 134 #endif /* _SYS_FS_ZFS_FUID_H */ 135