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      1    789    ahrens /*
      2    789    ahrens  * CDDL HEADER START
      3    789    ahrens  *
      4    789    ahrens  * The contents of this file are subject to the terms of the
      5   3461    ahrens  * Common Development and Distribution License (the "License").
      6   3461    ahrens  * You may not use this file except in compliance with the License.
      7    789    ahrens  *
      8    789    ahrens  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9    789    ahrens  * or http://www.opensolaris.org/os/licensing.
     10    789    ahrens  * See the License for the specific language governing permissions
     11    789    ahrens  * and limitations under the License.
     12    789    ahrens  *
     13    789    ahrens  * When distributing Covered Code, include this CDDL HEADER in each
     14    789    ahrens  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15    789    ahrens  * If applicable, add the following below this CDDL HEADER, with the
     16    789    ahrens  * fields enclosed by brackets "[]" replaced with your own identifying
     17    789    ahrens  * information: Portions Copyright [yyyy] [name of copyright owner]
     18    789    ahrens  *
     19    789    ahrens  * CDDL HEADER END
     20    789    ahrens  */
     21    789    ahrens /*
     22   8845       amw  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     23    789    ahrens  * Use is subject to license terms.
     24    789    ahrens  */
     25    789    ahrens 
     26    789    ahrens #ifndef	_SYS_FS_ZFS_VFSOPS_H
     27    789    ahrens #define	_SYS_FS_ZFS_VFSOPS_H
     28    789    ahrens 
     29    789    ahrens #include <sys/isa_defs.h>
     30    789    ahrens #include <sys/types32.h>
     31    789    ahrens #include <sys/list.h>
     32    789    ahrens #include <sys/vfs.h>
     33    789    ahrens #include <sys/zil.h>
     34   5326  ek110237 #include <sys/rrwlock.h>
     35   5498      timh #include <sys/zfs_ioctl.h>
     36    789    ahrens 
     37    789    ahrens #ifdef	__cplusplus
     38    789    ahrens extern "C" {
     39    789    ahrens #endif
     40    789    ahrens 
     41    789    ahrens typedef struct zfsvfs zfsvfs_t;
     42    789    ahrens 
     43    789    ahrens struct zfsvfs {
     44    789    ahrens 	vfs_t		*z_vfs;		/* generic fs struct */
     45    789    ahrens 	zfsvfs_t	*z_parent;	/* parent fs */
     46    789    ahrens 	objset_t	*z_os;		/* objset reference */
     47    789    ahrens 	uint64_t	z_root;		/* id of root znode */
     48   3461    ahrens 	uint64_t	z_unlinkedobj;	/* id of unlinked zapobj */
     49    789    ahrens 	uint64_t	z_max_blksz;	/* maximum block size for files */
     50   5331       amw 	uint64_t	z_fuid_obj;	/* fuid table object number */
     51   5824     marks 	uint64_t	z_fuid_size;	/* fuid table size */
     52   5331       amw 	avl_tree_t	z_fuid_idx;	/* fuid tree keyed by index */
     53   5331       amw 	avl_tree_t	z_fuid_domain;	/* fuid tree keyed by domain */
     54   5331       amw 	krwlock_t	z_fuid_lock;	/* fuid lock */
     55   5331       amw 	boolean_t	z_fuid_loaded;	/* fuid tables are loaded */
     56   9179      Mark 	boolean_t	z_fuid_dirty;   /* need to sync fuid table ? */
     57   5331       amw 	struct zfs_fuid_info	*z_fuid_replay; /* fuid info for replay */
     58    789    ahrens 	zilog_t		*z_log;		/* intent log pointer */
     59    789    ahrens 	uint_t		z_acl_mode;	/* acl chmod/mode behavior */
     60    789    ahrens 	uint_t		z_acl_inherit;	/* acl inheritance behavior */
     61   5498      timh 	zfs_case_t	z_case;		/* case-sense */
     62   5498      timh 	boolean_t	z_utf8;		/* utf8-only */
     63   5331       amw 	int		z_norm;		/* normalization flags */
     64    789    ahrens 	boolean_t	z_atime;	/* enable atimes mount option */
     65   4787    ahrens 	boolean_t	z_unmounted;	/* unmounted */
     66   5326  ek110237 	rrwlock_t	z_teardown_lock;
     67   5326  ek110237 	krwlock_t	z_teardown_inactive_lock;
     68    789    ahrens 	list_t		z_all_znodes;	/* all vnodes in the fs */
     69    789    ahrens 	kmutex_t	z_znodes_lock;	/* lock for z_all_znodes */
     70    789    ahrens 	vnode_t		*z_ctldir;	/* .zfs directory pointer */
     71    789    ahrens 	boolean_t	z_show_ctldir;	/* expose .zfs in the root dir */
     72    789    ahrens 	boolean_t	z_issnap;	/* true if this is a snapshot */
     73   5331       amw 	boolean_t	z_vscan;	/* virus scan on/off */
     74   5331       amw 	boolean_t	z_use_fuids;	/* version allows fuids */
     75   8227      Neil 	boolean_t	z_replay;	/* set during ZIL replay */
     76   6083  ek110237 	uint64_t	z_version;	/* ZPL version */
     77   8845       amw 	uint64_t	z_shares_dir;	/* hidden shares dir */
     78   9030      Mark 	kmutex_t	z_lock;
     79   9396   Matthew 	uint64_t	z_userquota_obj;
     80   9396   Matthew 	uint64_t	z_groupquota_obj;
     81    789    ahrens #define	ZFS_OBJ_MTX_SZ	64
     82    789    ahrens 	kmutex_t	z_hold_mtx[ZFS_OBJ_MTX_SZ];	/* znode hold locks */
     83    789    ahrens };
     84    789    ahrens 
     85    789    ahrens /*
     86   4820  ek110237  * Normal filesystems (those not under .zfs/snapshot) have a total
     87   4820  ek110237  * file ID size limited to 12 bytes (including the length field) due to
     88   4820  ek110237  * NFSv2 protocol's limitation of 32 bytes for a filehandle.  For historical
     89   4820  ek110237  * reasons, this same limit is being imposed by the Solaris NFSv3 implementation
     90   4820  ek110237  * (although the NFSv3 protocol actually permits a maximum of 64 bytes).  It
     91   4820  ek110237  * is not possible to expand beyond 12 bytes without abandoning support
     92   4820  ek110237  * of NFSv2.
     93    789    ahrens  *
     94   4820  ek110237  * For normal filesystems, we partition up the available space as follows:
     95    789    ahrens  *	2 bytes		fid length (required)
     96    789    ahrens  *	6 bytes		object number (48 bits)
     97    789    ahrens  *	4 bytes		generation number (32 bits)
     98   4820  ek110237  *
     99    789    ahrens  * We reserve only 48 bits for the object number, as this is the limit
    100    789    ahrens  * currently defined and imposed by the DMU.
    101    789    ahrens  */
    102    789    ahrens typedef struct zfid_short {
    103    789    ahrens 	uint16_t	zf_len;
    104    789    ahrens 	uint8_t		zf_object[6];		/* obj[i] = obj >> (8 * i) */
    105    789    ahrens 	uint8_t		zf_gen[4];		/* gen[i] = gen >> (8 * i) */
    106    789    ahrens } zfid_short_t;
    107    789    ahrens 
    108   4820  ek110237 /*
    109   4820  ek110237  * Filesystems under .zfs/snapshot have a total file ID size of 22 bytes
    110   4820  ek110237  * (including the length field).  This makes files under .zfs/snapshot
    111   4820  ek110237  * accessible by NFSv3 and NFSv4, but not NFSv2.
    112   4820  ek110237  *
    113   4820  ek110237  * For files under .zfs/snapshot, we partition up the available space
    114   4820  ek110237  * as follows:
    115   4820  ek110237  *	2 bytes		fid length (required)
    116   4820  ek110237  *	6 bytes		object number (48 bits)
    117   4820  ek110237  *	4 bytes		generation number (32 bits)
    118   4820  ek110237  *	6 bytes		objset id (48 bits)
    119   4820  ek110237  *	4 bytes		currently just zero (32 bits)
    120   4820  ek110237  *
    121   4820  ek110237  * We reserve only 48 bits for the object number and objset id, as these are
    122   4820  ek110237  * the limits currently defined and imposed by the DMU.
    123   4820  ek110237  */
    124    789    ahrens typedef struct zfid_long {
    125    789    ahrens 	zfid_short_t	z_fid;
    126    789    ahrens 	uint8_t		zf_setid[6];		/* obj[i] = obj >> (8 * i) */
    127    789    ahrens 	uint8_t		zf_setgen[4];		/* gen[i] = gen >> (8 * i) */
    128    789    ahrens } zfid_long_t;
    129    789    ahrens 
    130    789    ahrens #define	SHORT_FID_LEN	(sizeof (zfid_short_t) - sizeof (uint16_t))
    131    789    ahrens #define	LONG_FID_LEN	(sizeof (zfid_long_t) - sizeof (uint16_t))
    132    789    ahrens 
    133   4720  fr157268 extern uint_t zfs_fsyncer_key;
    134   4720  fr157268 
    135  10298   Matthew extern int zfs_suspend_fs(zfsvfs_t *zfsvfs);
    136  10298   Matthew extern int zfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname);
    137   9396   Matthew extern int zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
    138   9396   Matthew     const char *domain, uint64_t rid, uint64_t *valuep);
    139   9396   Matthew extern int zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
    140   9396   Matthew     uint64_t *cookiep, void *vbuf, uint64_t *bufsizep);
    141   9396   Matthew extern int zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type,
    142   9396   Matthew     const char *domain, uint64_t rid, uint64_t quota);
    143   9396   Matthew extern boolean_t zfs_usergroup_overquota(zfsvfs_t *zfsvfs,
    144   9396   Matthew     boolean_t isgroup, uint64_t fuid);
    145   9396   Matthew extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers);
    146  11185      Sean extern int zfsvfs_create(const char *name, zfsvfs_t **zfvp);
    147   9396   Matthew extern void zfsvfs_free(zfsvfs_t *zfsvfs);
    148  10972       Ric extern int zfs_check_global_label(const char *dsname, const char *hexsl);
    149   5326  ek110237 
    150    789    ahrens #ifdef	__cplusplus
    151    789    ahrens }
    152    789    ahrens #endif
    153    789    ahrens 
    154    789    ahrens #endif	/* _SYS_FS_ZFS_VFSOPS_H */
    155