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