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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_FS_ZFS_VFSOPS_H 27 #define _SYS_FS_ZFS_VFSOPS_H 28 29 #include <sys/isa_defs.h> 30 #include <sys/types32.h> 31 #include <sys/list.h> 32 #include <sys/vfs.h> 33 #include <sys/zil.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 43 struct zfsvfs { 44 vfs_t *z_vfs; /* generic fs struct */ 45 zfsvfs_t *z_parent; /* parent fs */ 46 objset_t *z_os; /* objset reference */ 47 uint64_t z_root; /* id of root znode */ 48 uint64_t z_unlinkedobj; /* id of unlinked zapobj */ 49 uint64_t z_max_blksz; /* maximum block size for files */ 50 uint64_t z_fuid_obj; /* fuid table object number */ 51 uint64_t z_fuid_size; /* fuid table size */ 52 avl_tree_t z_fuid_idx; /* fuid tree keyed by index */ 53 avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */ 54 krwlock_t z_fuid_lock; /* fuid lock */ 55 boolean_t z_fuid_loaded; /* fuid tables are loaded */ 56 struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */ 57 zilog_t *z_log; /* intent log pointer */ 58 uint_t z_acl_mode; /* acl chmod/mode behavior */ 59 uint_t z_acl_inherit; /* acl inheritance behavior */ 60 zfs_case_t z_case; /* case-sense */ 61 boolean_t z_utf8; /* utf8-only */ 62 int z_norm; /* normalization flags */ 63 boolean_t z_atime; /* enable atimes mount option */ 64 boolean_t z_unmounted; /* unmounted */ 65 rrwlock_t z_teardown_lock; 66 krwlock_t z_teardown_inactive_lock; 67 list_t z_all_znodes; /* all vnodes in the fs */ 68 kmutex_t z_znodes_lock; /* lock for z_all_znodes */ 69 vnode_t *z_ctldir; /* .zfs directory pointer */ 70 boolean_t z_show_ctldir; /* expose .zfs in the root dir */ 71 boolean_t z_issnap; /* true if this is a snapshot */ 72 boolean_t z_vscan; /* virus scan on/off */ 73 boolean_t z_use_fuids; /* version allows fuids */ 74 boolean_t z_replay; /* set during ZIL replay */ 75 kmutex_t z_online_recv_lock; /* recv in prog grabs as WRITER */ 76 uint64_t z_version; /* ZPL version */ 77 uint64_t z_shares_dir; /* hidden shares dir */ 78 kmutex_t z_lock; 79 #define ZFS_OBJ_MTX_SZ 64 80 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */ 81 }; 82 83 /* 84 * Normal filesystems (those not under .zfs/snapshot) have a total 85 * file ID size limited to 12 bytes (including the length field) due to 86 * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical 87 * reasons, this same limit is being imposed by the Solaris NFSv3 implementation 88 * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It 89 * is not possible to expand beyond 12 bytes without abandoning support 90 * of NFSv2. 91 * 92 * For normal filesystems, we partition up the available space as follows: 93 * 2 bytes fid length (required) 94 * 6 bytes object number (48 bits) 95 * 4 bytes generation number (32 bits) 96 * 97 * We reserve only 48 bits for the object number, as this is the limit 98 * currently defined and imposed by the DMU. 99 */ 100 typedef struct zfid_short { 101 uint16_t zf_len; 102 uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */ 103 uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */ 104 } zfid_short_t; 105 106 /* 107 * Filesystems under .zfs/snapshot have a total file ID size of 22 bytes 108 * (including the length field). This makes files under .zfs/snapshot 109 * accessible by NFSv3 and NFSv4, but not NFSv2. 110 * 111 * For files under .zfs/snapshot, we partition up the available space 112 * as follows: 113 * 2 bytes fid length (required) 114 * 6 bytes object number (48 bits) 115 * 4 bytes generation number (32 bits) 116 * 6 bytes objset id (48 bits) 117 * 4 bytes currently just zero (32 bits) 118 * 119 * We reserve only 48 bits for the object number and objset id, as these are 120 * the limits currently defined and imposed by the DMU. 121 */ 122 typedef struct zfid_long { 123 zfid_short_t z_fid; 124 uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */ 125 uint8_t zf_setgen[4]; /* gen[i] = gen >> (8 * i) */ 126 } zfid_long_t; 127 128 #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t)) 129 #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t)) 130 131 extern uint_t zfs_fsyncer_key; 132 133 extern int zfs_suspend_fs(zfsvfs_t *zfsvfs, char *osname, int *mode); 134 extern int zfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname, int mode); 135 136 #ifdef __cplusplus 137 } 138 #endif 139 140 #endif /* _SYS_FS_ZFS_VFSOPS_H */ 141