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Diffstat (limited to 'sys/contrib/opensolaris/uts/common/fs/zfs/sys/zfs_vfsops.h')
-rw-r--r-- | sys/contrib/opensolaris/uts/common/fs/zfs/sys/zfs_vfsops.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/sys/contrib/opensolaris/uts/common/fs/zfs/sys/zfs_vfsops.h b/sys/contrib/opensolaris/uts/common/fs/zfs/sys/zfs_vfsops.h new file mode 100644 index 0000000..aa82cc1 --- /dev/null +++ b/sys/contrib/opensolaris/uts/common/fs/zfs/sys/zfs_vfsops.h @@ -0,0 +1,100 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#ifndef _SYS_FS_ZFS_VFSOPS_H +#define _SYS_FS_ZFS_VFSOPS_H + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include <sys/list.h> +#include <sys/vfs.h> +#include <sys/zil.h> + +#ifdef __cplusplus +extern "C" { +#endif + +typedef struct zfsvfs zfsvfs_t; + +struct zfsvfs { + vfs_t *z_vfs; /* generic fs struct */ + zfsvfs_t *z_parent; /* parent fs */ + objset_t *z_os; /* objset reference */ + uint64_t z_root; /* id of root znode */ + uint64_t z_unlinkedobj; /* id of unlinked zapobj */ + uint64_t z_max_blksz; /* maximum block size for files */ + uint64_t z_assign; /* TXG_NOWAIT or set by zil_replay() */ + zilog_t *z_log; /* intent log pointer */ + uint_t z_acl_mode; /* acl chmod/mode behavior */ + uint_t z_acl_inherit; /* acl inheritance behavior */ + boolean_t z_atime; /* enable atimes mount option */ + boolean_t z_unmounted1; /* unmounted phase 1 */ + boolean_t z_unmounted2; /* unmounted phase 2 */ + uint32_t z_op_cnt; /* vnode/vfs operations ref count */ + krwlock_t z_um_lock; /* rw lock for umount phase 2 */ + list_t z_all_znodes; /* all vnodes in the fs */ + kmutex_t z_znodes_lock; /* lock for z_all_znodes */ + vnode_t *z_ctldir; /* .zfs directory pointer */ + boolean_t z_show_ctldir; /* expose .zfs in the root dir */ + boolean_t z_issnap; /* true if this is a snapshot */ +#define ZFS_OBJ_MTX_SZ 64 + kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */ +}; + +/* + * The total file ID size is limited to 12 bytes (including the length + * field) in the NFSv2 protocol. For historical reasons, this same limit + * is currently being imposed by the Solaris NFSv3 implementation... + * although the protocol actually permits a maximum of 64 bytes. It will + * not be possible to expand beyond 12 bytes without abandoning support + * of NFSv2 and making some changes to the Solaris NFSv3 implementation. + * + * For the time being, we will partition up the available space as follows: + * 2 bytes fid length (required) + * 6 bytes object number (48 bits) + * 4 bytes generation number (32 bits) + * We reserve only 48 bits for the object number, as this is the limit + * currently defined and imposed by the DMU. + */ +typedef struct zfid_short { + uint16_t zf_len; + uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */ + uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */ +} zfid_short_t; + +typedef struct zfid_long { + zfid_short_t z_fid; + uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */ + uint8_t zf_setgen[2]; /* gen[i] = gen >> (8 * i) */ +} zfid_long_t; + +#define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t)) +#define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t)) + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_FS_ZFS_VFSOPS_H */ |