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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 #ifndef _SYS_FS_ZFS_VFSOPS_H 26 #define _SYS_FS_ZFS_VFSOPS_H 27 28 #include <sys/isa_defs.h> 29 #include <sys/types32.h> 30 #include <sys/list.h> 31 #include <sys/vfs.h> 32 #include <sys/zil.h> 33 #include <sys/sa.h> 34 #include <sys/rrwlock.h> 35 #include <sys/zfs_ioctl.h> 36 #include <sys/dsl_dataset.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 typedef struct zfsvfs zfsvfs_t; 43 struct znode; 44 45 struct zfsvfs { 46 vfs_t *z_vfs; /* generic fs struct */ 47 zfsvfs_t *z_parent; /* parent fs */ 48 objset_t *z_os; /* objset reference */ 49 uint64_t z_root; /* id of root znode */ 50 uint64_t z_unlinkedobj; /* id of unlinked zapobj */ 51 uint64_t z_max_blksz; /* maximum block size for files */ 52 uint64_t z_fuid_obj; /* fuid table object number */ 53 uint64_t z_fuid_size; /* fuid table size */ 54 avl_tree_t z_fuid_idx; /* fuid tree keyed by index */ 55 avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */ 56 krwlock_t z_fuid_lock; /* fuid lock */ 57 boolean_t z_fuid_loaded; /* fuid tables are loaded */ 58 boolean_t z_fuid_dirty; /* need to sync fuid table ? */ 59 struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */ 60 zilog_t *z_log; /* intent log pointer */ 61 uint_t z_acl_mode; /* acl chmod/mode behavior */ 62 uint_t z_acl_inherit; /* acl inheritance behavior */ 63 boolean_t z_acl_implicit; /* acl implicit owner rights */ 64 zfs_case_t z_case; /* case-sense */ 65 boolean_t z_utf8; /* utf8-only */ 66 int z_norm; /* normalization flags */ 67 boolean_t z_atime; /* enable atimes mount option */ 68 boolean_t z_unmounted; /* unmounted */ 69 rrmlock_t z_teardown_lock; 70 krwlock_t z_teardown_inactive_lock; 71 list_t z_all_znodes; /* all vnodes in the fs */ 72 kmutex_t z_znodes_lock; /* lock for z_all_znodes */ 73 vnode_t *z_rootdir; /* mount root directory pointer */ 74 vnode_t *z_ctldir; /* .zfs directory pointer */ 75 boolean_t z_show_ctldir; /* expose .zfs in the root dir */ 76 boolean_t z_issnap; /* true if this is a snapshot */ 77 boolean_t z_vscan; /* virus scan on/off */ 78 boolean_t z_use_fuids; /* version allows fuids */ 79 boolean_t z_replay; /* set during ZIL replay */ 80 boolean_t z_use_sa; /* version allow system attributes */ 81 boolean_t z_draining; /* is true when drain is active */ 82 boolean_t z_drain_cancel; /* signal the unlinked drain to stop */ 83 uint64_t z_version; /* ZPL version */ 84 uint64_t z_shares_dir; /* hidden shares dir */ 85 kmutex_t z_lock; 86 uint64_t z_userquota_obj; 87 uint64_t z_groupquota_obj; 88 uint64_t z_userobjquota_obj; 89 uint64_t z_groupobjquota_obj; 90 uint64_t z_projectquota_obj; 91 uint64_t z_projectobjquota_obj; 92 uint64_t z_replay_eof; /* New end of file - replay only */ 93 sa_attr_type_t *z_attr_table; /* SA attr mapping->id */ 94 #define ZFS_OBJ_MTX_SZ 64 95 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */ 96 taskqid_t z_drain_task; /* task id for the unlink drain task */ 97 }; 98 99 /* 100 * Normal filesystems (those not under .zfs/snapshot) have a total 101 * file ID size limited to 12 bytes (including the length field) due to 102 * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical 103 * reasons, this same limit is being imposed by the Solaris NFSv3 implementation 104 * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It 105 * is not possible to expand beyond 12 bytes without abandoning support 106 * of NFSv2. 107 * 108 * For normal filesystems, we partition up the available space as follows: 109 * 2 bytes fid length (required) 110 * 6 bytes object number (48 bits) 111 * 4 bytes generation number (32 bits) 112 * 113 * We reserve only 48 bits for the object number, as this is the limit 114 * currently defined and imposed by the DMU. 115 */ 116 typedef struct zfid_short { 117 uint16_t zf_len; 118 uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */ 119 uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */ 120 } zfid_short_t; 121 122 /* 123 * Filesystems under .zfs/snapshot have a total file ID size of 22 bytes 124 * (including the length field). This makes files under .zfs/snapshot 125 * accessible by NFSv3 and NFSv4, but not NFSv2. 126 * 127 * For files under .zfs/snapshot, we partition up the available space 128 * as follows: 129 * 2 bytes fid length (required) 130 * 6 bytes object number (48 bits) 131 * 4 bytes generation number (32 bits) 132 * 6 bytes objset id (48 bits) 133 * 4 bytes currently just zero (32 bits) 134 * 135 * We reserve only 48 bits for the object number and objset id, as these are 136 * the limits currently defined and imposed by the DMU. 137 */ 138 typedef struct zfid_long { 139 zfid_short_t z_fid; 140 uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */ 141 uint8_t zf_setgen[4]; /* gen[i] = gen >> (8 * i) */ 142 } zfid_long_t; 143 144 #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t)) 145 #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t)) 146 147 extern uint_t zfs_fsyncer_key; 148 149 extern int zfs_suspend_fs(zfsvfs_t *zfsvfs); 150 extern int zfs_resume_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds); 151 extern int zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 152 const char *domain, uint64_t rid, uint64_t *valuep); 153 extern int zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 154 uint64_t *cookiep, void *vbuf, uint64_t *bufsizep); 155 extern int zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 156 const char *domain, uint64_t rid, uint64_t quota); 157 extern boolean_t zfs_id_overblockquota(zfsvfs_t *zfsvfs, uint64_t usedobj, 158 uint64_t id); 159 extern boolean_t zfs_id_overobjquota(zfsvfs_t *zfsvfs, uint64_t usedobj, 160 uint64_t id); 161 extern boolean_t zfs_id_overquota(zfsvfs_t *zfsvfs, uint64_t usedobj, 162 uint64_t id); 163 extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers); 164 extern int zfsvfs_create(const char *name, boolean_t readony, zfsvfs_t **zfvp); 165 extern int zfsvfs_create_impl(zfsvfs_t **zfvp, zfsvfs_t *zfsvfs, objset_t *os); 166 extern void zfsvfs_free(zfsvfs_t *zfsvfs); 167 extern int zfs_check_global_label(const char *dsname, const char *hexsl); 168 extern int zfs_get_temporary_prop(dsl_dataset_t *ds, zfs_prop_t zfs_prop, 169 uint64_t *val, char *setpoint); 170 171 #ifdef __cplusplus 172 } 173 #endif 174 175 #endif /* _SYS_FS_ZFS_VFSOPS_H */ 176