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/*
* 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2015 by Delphix. All rights reserved.
* Copyright (c) 2014 Integros [integros.com]
* Copyright 2016 Nexenta Systems, Inc. All rights reserved.
*/
#ifndef _FREEBSD_ZFS_SYS_ZNODE_IMPL_H
#define _FREEBSD_ZFS_SYS_ZNODE_IMPL_H
#include <sys/list.h>
#include <sys/dmu.h>
#include <sys/sa.h>
#include <sys/zfs_vfsops.h>
#include <sys/rrwlock.h>
#include <sys/zfs_sa.h>
#include <sys/zfs_stat.h>
#include <sys/zfs_rlock.h>
#include <sys/zfs_acl.h>
#include <sys/zil.h>
#include <sys/zfs_project.h>
#include <vm/vm_object.h>
#include <sys/uio.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Directory entry locks control access to directory entries.
* They are used to protect creates, deletes, and renames.
* Each directory znode has a mutex and a list of locked names.
*/
#define ZNODE_OS_FIELDS \
struct zfsvfs *z_zfsvfs; \
vnode_t *z_vnode; \
char *z_cached_symlink; \
uint64_t z_uid; \
uint64_t z_gid; \
uint64_t z_gen; \
uint64_t z_atime[2]; \
uint64_t z_links;
#define ZFS_LINK_MAX UINT64_MAX
/*
* ZFS minor numbers can refer to either a control device instance or
* a zvol. Depending on the value of zss_type, zss_data points to either
* a zvol_state_t or a zfs_onexit_t.
*/
enum zfs_soft_state_type {
ZSST_ZVOL,
ZSST_CTLDEV
};
typedef struct zfs_soft_state {
enum zfs_soft_state_type zss_type;
void *zss_data;
} zfs_soft_state_t;
/*
* Range locking rules
* --------------------
* 1. When truncating a file (zfs_create, zfs_setattr, zfs_space) the whole
* file range needs to be locked as RL_WRITER. Only then can the pages be
* freed etc and zp_size reset. zp_size must be set within range lock.
* 2. For writes and punching holes (zfs_write & zfs_space) just the range
* being written or freed needs to be locked as RL_WRITER.
* Multiple writes at the end of the file must coordinate zp_size updates
* to ensure data isn't lost. A compare and swap loop is currently used
* to ensure the file size is at least the offset last written.
* 3. For reads (zfs_read, zfs_get_data & zfs_putapage) just the range being
* read needs to be locked as RL_READER. A check against zp_size can then
* be made for reading beyond end of file.
*/
/*
* Convert between znode pointers and vnode pointers
*/
#define ZTOV(ZP) ((ZP)->z_vnode)
#define ZTOI(ZP) ((ZP)->z_vnode)
#define VTOZ(VP) ((struct znode *)(VP)->v_data)
#define VTOZ_SMR(VP) ((znode_t *)vn_load_v_data_smr(VP))
#define ITOZ(VP) ((struct znode *)(VP)->v_data)
#define zhold(zp) vhold(ZTOV((zp)))
#define zrele(zp) vrele(ZTOV((zp)))
#define ZTOZSB(zp) ((zp)->z_zfsvfs)
#define ITOZSB(vp) (VTOZ(vp)->z_zfsvfs)
#define ZTOTYPE(zp) (ZTOV(zp)->v_type)
#define ZTOGID(zp) ((zp)->z_gid)
#define ZTOUID(zp) ((zp)->z_uid)
#define ZTONLNK(zp) ((zp)->z_links)
#define Z_ISBLK(type) ((type) == VBLK)
#define Z_ISCHR(type) ((type) == VCHR)
#define Z_ISLNK(type) ((type) == VLNK)
#define Z_ISDIR(type) ((type) == VDIR)
#define zn_has_cached_data(zp) vn_has_cached_data(ZTOV(zp))
#define zn_rlimit_fsize(zp, uio) \
vn_rlimit_fsize(ZTOV(zp), GET_UIO_STRUCT(uio), zfs_uio_td(uio))
/* Called on entry to each ZFS vnode and vfs operation */
#define ZFS_ENTER(zfsvfs) \
{ \
ZFS_TEARDOWN_ENTER_READ((zfsvfs), FTAG); \
if (__predict_false((zfsvfs)->z_unmounted)) { \
ZFS_TEARDOWN_EXIT_READ(zfsvfs, FTAG); \
return (EIO); \
} \
}
/* Must be called before exiting the vop */
#define ZFS_EXIT(zfsvfs) ZFS_TEARDOWN_EXIT_READ(zfsvfs, FTAG)
/* Verifies the znode is valid */
#define ZFS_VERIFY_ZP(zp) \
if (__predict_false((zp)->z_sa_hdl == NULL)) { \
ZFS_EXIT((zp)->z_zfsvfs); \
return (EIO); \
} \
/*
* Macros for dealing with dmu_buf_hold
*/
#define ZFS_OBJ_HASH(obj_num) ((obj_num) & (ZFS_OBJ_MTX_SZ - 1))
#define ZFS_OBJ_MUTEX(zfsvfs, obj_num) \
(&(zfsvfs)->z_hold_mtx[ZFS_OBJ_HASH(obj_num)])
#define ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num) \
mutex_enter(ZFS_OBJ_MUTEX((zfsvfs), (obj_num)))
#define ZFS_OBJ_HOLD_TRYENTER(zfsvfs, obj_num) \
mutex_tryenter(ZFS_OBJ_MUTEX((zfsvfs), (obj_num)))
#define ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num) \
mutex_exit(ZFS_OBJ_MUTEX((zfsvfs), (obj_num)))
/* Encode ZFS stored time values from a struct timespec */
#define ZFS_TIME_ENCODE(tp, stmp) \
{ \
(stmp)[0] = (uint64_t)(tp)->tv_sec; \
(stmp)[1] = (uint64_t)(tp)->tv_nsec; \
}
/* Decode ZFS stored time values to a struct timespec */
#define ZFS_TIME_DECODE(tp, stmp) \
{ \
(tp)->tv_sec = (time_t)(stmp)[0]; \
(tp)->tv_nsec = (long)(stmp)[1]; \
}
#define ZFS_ACCESSTIME_STAMP(zfsvfs, zp) \
if ((zfsvfs)->z_atime && !((zfsvfs)->z_vfs->vfs_flag & VFS_RDONLY)) \
zfs_tstamp_update_setup_ext(zp, ACCESSED, NULL, NULL, B_FALSE);
extern void zfs_tstamp_update_setup_ext(struct znode *,
uint_t, uint64_t [2], uint64_t [2], boolean_t have_tx);
extern void zfs_znode_free(struct znode *);
extern zil_replay_func_t *zfs_replay_vector[TX_MAX_TYPE];
extern int zfsfstype;
extern int zfs_znode_parent_and_name(struct znode *zp, struct znode **dzpp,
char *buf);
#ifdef __cplusplus
}
#endif
#endif /* _FREEBSD_SYS_FS_ZFS_ZNODE_H */
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