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 https://opensource.org/licenses/CDDL-1.0. 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2012, 2018 by Delphix. All rights reserved. 24 * Copyright 2016 Nexenta Systems, Inc. All rights reserved. 25 */ 26 27#ifndef _SYS_ZFS_ZNODE_IMPL_H 28#define _SYS_ZFS_ZNODE_IMPL_H 29 30#ifndef _KERNEL 31#error "no user serviceable parts within" 32#endif 33 34#include <sys/isa_defs.h> 35#include <sys/types32.h> 36#include <sys/list.h> 37#include <sys/dmu.h> 38#include <sys/sa.h> 39#include <sys/time.h> 40#include <sys/zfs_vfsops.h> 41#include <sys/rrwlock.h> 42#include <sys/zfs_sa.h> 43#include <sys/zfs_stat.h> 44#include <sys/zfs_rlock.h> 45 46#ifdef __cplusplus 47extern "C" { 48#endif 49 50#if defined(HAVE_FILEMAP_RANGE_HAS_PAGE) 51#define ZNODE_OS_FIELDS \ 52 inode_timespec_t z_btime; /* creation/birth time (cached) */ \ 53 struct inode z_inode; 54#else 55#define ZNODE_OS_FIELDS \ 56 inode_timespec_t z_btime; /* creation/birth time (cached) */ \ 57 struct inode z_inode; \ 58 boolean_t z_is_mapped; /* we are mmap'ed */ 59#endif 60 61/* 62 * Convert between znode pointers and inode pointers 63 */ 64#define ZTOI(znode) (&((znode)->z_inode)) 65#define ITOZ(inode) (container_of((inode), znode_t, z_inode)) 66#define ZTOZSB(znode) ((zfsvfs_t *)(ZTOI(znode)->i_sb->s_fs_info)) 67#define ITOZSB(inode) ((zfsvfs_t *)((inode)->i_sb->s_fs_info)) 68 69#define ZTOTYPE(zp) (ZTOI(zp)->i_mode) 70#define ZTOGID(zp) (ZTOI(zp)->i_gid) 71#define ZTOUID(zp) (ZTOI(zp)->i_uid) 72#define ZTONLNK(zp) (ZTOI(zp)->i_nlink) 73 74#define Z_ISBLK(type) S_ISBLK(type) 75#define Z_ISCHR(type) S_ISCHR(type) 76#define Z_ISLNK(type) S_ISLNK(type) 77#define Z_ISDEV(type) (S_ISCHR(type) || S_ISBLK(type) || S_ISFIFO(type)) 78#define Z_ISDIR(type) S_ISDIR(type) 79 80#if defined(HAVE_FILEMAP_RANGE_HAS_PAGE) 81#define zn_has_cached_data(zp, start, end) \ 82 filemap_range_has_page(ZTOI(zp)->i_mapping, start, end) 83#else 84#define zn_has_cached_data(zp, start, end) \ 85 ((zp)->z_is_mapped) 86#endif 87 88#define zn_flush_cached_data(zp, sync) write_inode_now(ZTOI(zp), sync) 89#define zn_rlimit_fsize(size) (0) 90#define zn_rlimit_fsize_uio(zp, uio) (0) 91 92/* 93 * zhold() wraps igrab() on Linux, and igrab() may fail when the 94 * inode is in the process of being deleted. As zhold() must only be 95 * called when a ref already exists - so the inode cannot be 96 * mid-deletion - we VERIFY() this. 97 */ 98#define zhold(zp) VERIFY3P(igrab(ZTOI((zp))), !=, NULL) 99#define zrele(zp) iput(ZTOI((zp))) 100 101/* Called on entry to each ZFS inode and vfs operation. */ 102static inline int 103zfs_enter(zfsvfs_t *zfsvfs, const char *tag) 104{ 105 ZFS_TEARDOWN_ENTER_READ(zfsvfs, tag); 106 if (unlikely(zfsvfs->z_unmounted)) { 107 ZFS_TEARDOWN_EXIT_READ(zfsvfs, tag); 108 return (SET_ERROR(EIO)); 109 } 110 return (0); 111} 112 113/* Must be called before exiting the operation. */ 114static inline void 115zfs_exit(zfsvfs_t *zfsvfs, const char *tag) 116{ 117 zfs_exit_fs(zfsvfs); 118 ZFS_TEARDOWN_EXIT_READ(zfsvfs, tag); 119} 120 121static inline int 122zpl_enter(zfsvfs_t *zfsvfs, const char *tag) 123{ 124 return (-zfs_enter(zfsvfs, tag)); 125} 126 127static inline void 128zpl_exit(zfsvfs_t *zfsvfs, const char *tag) 129{ 130 ZFS_TEARDOWN_EXIT_READ(zfsvfs, tag); 131} 132 133/* zfs_verify_zp and zfs_enter_verify_zp are defined in zfs_znode.h */ 134#define zpl_verify_zp(zp) (-zfs_verify_zp(zp)) 135#define zpl_enter_verify_zp(zfsvfs, zp, tag) \ 136 (-zfs_enter_verify_zp(zfsvfs, zp, tag)) 137 138/* 139 * Macros for dealing with dmu_buf_hold 140 */ 141#define ZFS_OBJ_MTX_SZ 64 142#define ZFS_OBJ_MTX_MAX (1024 * 1024) 143#define ZFS_OBJ_HASH(zfsvfs, obj) ((obj) & ((zfsvfs->z_hold_size) - 1)) 144 145extern unsigned int zfs_object_mutex_size; 146 147/* 148 * Encode ZFS stored time values from a struct timespec / struct timespec64. 149 */ 150#define ZFS_TIME_ENCODE(tp, stmp) \ 151do { \ 152 (stmp)[0] = (uint64_t)(tp)->tv_sec; \ 153 (stmp)[1] = (uint64_t)(tp)->tv_nsec; \ 154} while (0) 155 156#if defined(HAVE_INODE_TIMESPEC64_TIMES) 157/* 158 * Decode ZFS stored time values to a struct timespec64 159 * 4.18 and newer kernels. 160 */ 161#define ZFS_TIME_DECODE(tp, stmp) \ 162do { \ 163 (tp)->tv_sec = (time64_t)(stmp)[0]; \ 164 (tp)->tv_nsec = (long)(stmp)[1]; \ 165} while (0) 166#else 167/* 168 * Decode ZFS stored time values to a struct timespec 169 * 4.17 and older kernels. 170 */ 171#define ZFS_TIME_DECODE(tp, stmp) \ 172do { \ 173 (tp)->tv_sec = (time_t)(stmp)[0]; \ 174 (tp)->tv_nsec = (long)(stmp)[1]; \ 175} while (0) 176#endif /* HAVE_INODE_TIMESPEC64_TIMES */ 177 178#define ZFS_ACCESSTIME_STAMP(zfsvfs, zp) 179 180struct znode; 181 182extern int zfs_sync(struct super_block *, int, cred_t *); 183extern int zfs_inode_alloc(struct super_block *, struct inode **ip); 184extern void zfs_inode_destroy(struct inode *); 185extern void zfs_mark_inode_dirty(struct inode *); 186extern boolean_t zfs_relatime_need_update(const struct inode *); 187 188#if defined(HAVE_UIO_RW) 189extern caddr_t zfs_map_page(page_t *, enum seg_rw); 190extern void zfs_unmap_page(page_t *, caddr_t); 191#endif /* HAVE_UIO_RW */ 192 193extern zil_replay_func_t *const zfs_replay_vector[TX_MAX_TYPE]; 194 195#ifdef __cplusplus 196} 197#endif 198 199#endif /* _SYS_ZFS_ZNODE_IMPL_H */ 200