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 2007 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 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/isa_defs.h> 32 #include <sys/types32.h> 33 #include <sys/list.h> 34 #include <sys/vfs.h> 35 #include <sys/zil.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_assign; /* TXG_NOWAIT or set by zil_replay() */ 51 zilog_t *z_log; /* intent log pointer */ 52 uint_t z_acl_mode; /* acl chmod/mode behavior */ 53 uint_t z_acl_inherit; /* acl inheritance behavior */ 54 boolean_t z_atime; /* enable atimes mount option */ 55 boolean_t z_unmounted1; /* unmounted phase 1 */ 56 boolean_t z_unmounted2; /* unmounted phase 2 */ 57 uint32_t z_op_cnt; /* vnode/vfs operations ref count */ 58 krwlock_t z_um_lock; /* rw lock for umount phase 2 */ 59 list_t z_all_znodes; /* all vnodes in the fs */ 60 kmutex_t z_znodes_lock; /* lock for z_all_znodes */ 61 vnode_t *z_ctldir; /* .zfs directory pointer */ 62 boolean_t z_show_ctldir; /* expose .zfs in the root dir */ 63 boolean_t z_issnap; /* true if this is a snapshot */ 64 #define ZFS_OBJ_MTX_SZ 64 65 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */ 66 }; 67 68 /* 69 * The total file ID size is limited to 12 bytes (including the length 70 * field) in the NFSv2 protocol. For historical reasons, this same limit 71 * is currently being imposed by the Solaris NFSv3 implementation... 72 * although the protocol actually permits a maximum of 64 bytes. It will 73 * not be possible to expand beyond 12 bytes without abandoning support 74 * of NFSv2 and making some changes to the Solaris NFSv3 implementation. 75 * 76 * For the time being, we will partition up the available space as follows: 77 * 2 bytes fid length (required) 78 * 6 bytes object number (48 bits) 79 * 4 bytes generation number (32 bits) 80 * We reserve only 48 bits for the object number, as this is the limit 81 * currently defined and imposed by the DMU. 82 */ 83 typedef struct zfid_short { 84 uint16_t zf_len; 85 uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */ 86 uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */ 87 } zfid_short_t; 88 89 typedef struct zfid_long { 90 zfid_short_t z_fid; 91 uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */ 92 uint8_t zf_setgen[4]; /* gen[i] = gen >> (8 * i) */ 93 } zfid_long_t; 94 95 #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t)) 96 #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t)) 97 98 #ifdef __cplusplus 99 } 100 #endif 101 102 #endif /* _SYS_FS_ZFS_VFSOPS_H */ 103