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 https://opensource.org/licenses/CDDL-1.0. 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 #ifdef _KERNEL 30 #include <sys/sid.h> 31 #include <sys/dmu.h> 32 #include <sys/zfs_vfsops.h> 33 #endif 34 #include <sys/avl.h> 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 typedef enum { 41 ZFS_OWNER, 42 ZFS_GROUP, 43 ZFS_ACE_USER, 44 ZFS_ACE_GROUP 45 } zfs_fuid_type_t; 46 47 /* 48 * Estimate space needed for one more fuid table entry. 49 * for now assume its current size + 1K 50 */ 51 #define FUID_SIZE_ESTIMATE(z) ((z)->z_fuid_size + (SPA_MINBLOCKSIZE << 1)) 52 53 #define FUID_INDEX(x) ((x) >> 32) 54 #define FUID_RID(x) ((x) & 0xffffffff) 55 #define FUID_ENCODE(idx, rid) (((uint64_t)(idx) << 32) | (rid)) 56 /* 57 * FUIDs cause problems for the intent log 58 * we need to replay the creation of the FUID, 59 * but we can't count on the idmapper to be around 60 * and during replay the FUID index may be different than 61 * before. Also, if an ACL has 100 ACEs and 12 different 62 * domains we don't want to log 100 domain strings, but rather 63 * just the unique 12. 64 */ 65 66 /* 67 * The FUIDs in the log will index into 68 * domain string table and the bottom half will be the rid. 69 * Used for mapping ephemeral uid/gid during ACL setting to FUIDs 70 */ 71 typedef struct zfs_fuid { 72 list_node_t z_next; 73 uint64_t z_id; /* uid/gid being converted to fuid */ 74 uint64_t z_domidx; /* index in AVL domain table */ 75 uint64_t z_logfuid; /* index for domain in log */ 76 } zfs_fuid_t; 77 78 /* list of unique domains */ 79 typedef struct zfs_fuid_domain { 80 list_node_t z_next; 81 uint64_t z_domidx; /* AVL tree idx */ 82 const char *z_domain; /* domain string */ 83 } zfs_fuid_domain_t; 84 85 /* 86 * FUID information necessary for logging create, setattr, and setacl. 87 */ 88 typedef struct zfs_fuid_info { 89 list_t z_fuids; 90 list_t z_domains; 91 uint64_t z_fuid_owner; 92 uint64_t z_fuid_group; 93 char **z_domain_table; /* Used during replay */ 94 uint32_t z_fuid_cnt; /* How many fuids in z_fuids */ 95 uint32_t z_domain_cnt; /* How many domains */ 96 size_t z_domain_str_sz; /* len of domain strings z_domain list */ 97 } zfs_fuid_info_t; 98 99 #ifdef _KERNEL 100 struct znode; 101 extern uid_t zfs_fuid_map_id(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t); 102 extern void zfs_fuid_node_add(zfs_fuid_info_t **, const char *, uint32_t, 103 uint64_t, uint64_t, zfs_fuid_type_t); 104 extern void zfs_fuid_destroy(zfsvfs_t *); 105 extern uint64_t zfs_fuid_create_cred(zfsvfs_t *, zfs_fuid_type_t, 106 cred_t *, zfs_fuid_info_t **); 107 extern uint64_t zfs_fuid_create(zfsvfs_t *, uint64_t, cred_t *, zfs_fuid_type_t, 108 zfs_fuid_info_t **); 109 extern void zfs_fuid_map_ids(struct znode *zp, cred_t *cr, 110 uid_t *uid, uid_t *gid); 111 extern zfs_fuid_info_t *zfs_fuid_info_alloc(void); 112 extern void zfs_fuid_info_free(zfs_fuid_info_t *); 113 extern boolean_t zfs_groupmember(zfsvfs_t *, uint64_t, cred_t *); 114 void zfs_fuid_sync(zfsvfs_t *, dmu_tx_t *); 115 extern const char *zfs_fuid_find_by_idx(zfsvfs_t *zfsvfs, uint32_t idx); 116 extern void zfs_fuid_txhold(zfsvfs_t *zfsvfs, dmu_tx_t *tx); 117 extern int zfs_id_to_fuidstr(zfsvfs_t *zfsvfs, const char *domain, uid_t rid, 118 char *buf, size_t len, boolean_t addok); 119 #endif 120 121 const char *zfs_fuid_idx_domain(avl_tree_t *, uint32_t); 122 void zfs_fuid_avl_tree_create(avl_tree_t *, avl_tree_t *); 123 uint64_t zfs_fuid_table_load(objset_t *, uint64_t, avl_tree_t *, avl_tree_t *); 124 void zfs_fuid_table_destroy(avl_tree_t *, avl_tree_t *); 125 126 #ifdef __cplusplus 127 } 128 #endif 129 130 #endif /* _SYS_FS_ZFS_FUID_H */ 131