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 * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>. 24 * All rights reserved. 25 */ 26 27 #ifndef _SYS_FS_ZFS_VFSOPS_H 28 #define _SYS_FS_ZFS_VFSOPS_H 29 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 struct zfsctl_root *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_use_namecache;/* make use of FreeBSD name cache */ 79 uint64_t z_version; /* ZPL version */ 80 uint64_t z_shares_dir; /* hidden shares dir */ 81 kmutex_t z_lock; 82 uint64_t z_userquota_obj; 83 uint64_t z_groupquota_obj; 84 uint64_t z_replay_eof; /* New end of file - replay only */ 85 sa_attr_type_t *z_attr_table; /* SA attr mapping->id */ 86 #define ZFS_OBJ_MTX_SZ 64 87 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */ 88 }; 89 90 /* 91 * Normal filesystems (those not under .zfs/snapshot) have a total 92 * file ID size limited to 12 bytes (including the length field) due to 93 * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical 94 * reasons, this same limit is being imposed by the Solaris NFSv3 implementation 95 * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It 96 * is not possible to expand beyond 12 bytes without abandoning support 97 * of NFSv2. 98 * 99 * For normal filesystems, we partition up the available space as follows: 100 * 2 bytes fid length (required) 101 * 6 bytes object number (48 bits) 102 * 4 bytes generation number (32 bits) 103 * 104 * We reserve only 48 bits for the object number, as this is the limit 105 * currently defined and imposed by the DMU. 106 */ 107 typedef struct zfid_short { 108 uint16_t zf_len; 109 uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */ 110 uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */ 111 } zfid_short_t; 112 113 /* 114 * Filesystems under .zfs/snapshot have a total file ID size of 22[*] bytes 115 * (including the length field). This makes files under .zfs/snapshot 116 * accessible by NFSv3 and NFSv4, but not NFSv2. 117 * 118 * For files under .zfs/snapshot, we partition up the available space 119 * as follows: 120 * 2 bytes fid length (required) 121 * 6 bytes object number (48 bits) 122 * 4 bytes generation number (32 bits) 123 * 6 bytes objset id (48 bits) 124 * 4 bytes[**] currently just zero (32 bits) 125 * 126 * We reserve only 48 bits for the object number and objset id, as these are 127 * the limits currently defined and imposed by the DMU. 128 * 129 * [*] 20 bytes on FreeBSD to fit into the size of struct fid. 130 * [**] 2 bytes on FreeBSD for the above reason. 131 */ 132 typedef struct zfid_long { 133 zfid_short_t z_fid; 134 uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */ 135 uint8_t zf_setgen[2]; /* gen[i] = gen >> (8 * i) */ 136 } zfid_long_t; 137 138 #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t)) 139 #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t)) 140 141 extern uint_t zfs_fsyncer_key; 142 extern int zfs_super_owner; 143 144 extern int zfs_suspend_fs(zfsvfs_t *zfsvfs); 145 extern int zfs_resume_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds); 146 extern int zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 147 const char *domain, uint64_t rid, uint64_t *valuep); 148 extern int zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 149 uint64_t *cookiep, void *vbuf, uint64_t *bufsizep); 150 extern int zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 151 const char *domain, uint64_t rid, uint64_t quota); 152 extern boolean_t zfs_owner_overquota(zfsvfs_t *zfsvfs, struct znode *, 153 boolean_t isgroup); 154 extern boolean_t zfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup, 155 uint64_t fuid); 156 extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers); 157 extern int zfsvfs_create(const char *name, zfsvfs_t **zfvp); 158 extern void zfsvfs_free(zfsvfs_t *zfsvfs); 159 extern int zfs_check_global_label(const char *dsname, const char *hexsl); 160 161 #ifdef _KERNEL 162 extern void zfsvfs_update_fromname(const char *oldname, const char *newname); 163 #endif 164 165 #ifdef __cplusplus 166 } 167 #endif 168 169 #endif /* _SYS_FS_ZFS_VFSOPS_H */ 170