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 (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/zfs_vfsops.h> 40 #include <sys/rrwlock.h> 41 #include <sys/zfs_sa.h> 42 #include <sys/zfs_stat.h> 43 #include <sys/zfs_rlock.h> 44 45 46 #ifdef __cplusplus 47 extern "C" { 48 #endif 49 50 #define ZNODE_OS_FIELDS \ 51 struct inode z_inode; 52 53 54 /* 55 * Convert between znode pointers and inode pointers 56 */ 57 #define ZTOI(znode) (&((znode)->z_inode)) 58 #define ITOZ(inode) (container_of((inode), znode_t, z_inode)) 59 #define ZTOZSB(znode) ((zfsvfs_t *)(ZTOI(znode)->i_sb->s_fs_info)) 60 #define ITOZSB(inode) ((zfsvfs_t *)((inode)->i_sb->s_fs_info)) 61 62 #define ZTOTYPE(zp) (ZTOI(zp)->i_mode) 63 #define ZTOGID(zp) (ZTOI(zp)->i_gid) 64 #define ZTOUID(zp) (ZTOI(zp)->i_uid) 65 #define ZTONLNK(zp) (ZTOI(zp)->i_nlink) 66 67 #define Z_ISBLK(type) S_ISBLK(type) 68 #define Z_ISCHR(type) S_ISCHR(type) 69 #define Z_ISLNK(type) S_ISLNK(type) 70 #define Z_ISDEV(type) (S_ISCHR(type) || S_ISBLK(type) || S_ISFIFO(type)) 71 #define Z_ISDIR(type) S_ISDIR(type) 72 73 #define zn_has_cached_data(zp) ((zp)->z_is_mapped) 74 #define zn_rlimit_fsize(zp, uio, td) (0) 75 76 #define zhold(zp) igrab(ZTOI((zp))) 77 #define zrele(zp) iput(ZTOI((zp))) 78 79 /* Called on entry to each ZFS inode and vfs operation. */ 80 #define ZFS_ENTER_ERROR(zfsvfs, error) \ 81 do { \ 82 ZFS_TEARDOWN_ENTER_READ(zfsvfs, FTAG); \ 83 if (unlikely((zfsvfs)->z_unmounted)) { \ 84 ZFS_EXIT_READ(zfsvfs, FTAG); \ 85 return (error); \ 86 } \ 87 } while (0) 88 #define ZFS_ENTER(zfsvfs) ZFS_ENTER_ERROR(zfsvfs, EIO) 89 #define ZPL_ENTER(zfsvfs) ZFS_ENTER_ERROR(zfsvfs, -EIO) 90 91 /* Must be called before exiting the operation. */ 92 #define ZFS_EXIT(zfsvfs) \ 93 do { \ 94 zfs_exit_fs(zfsvfs); \ 95 ZFS_EXIT_READ(zfsvfs, FTAG); \ 96 } while (0) 97 98 #define ZPL_EXIT(zfsvfs) \ 99 do { \ 100 rrm_exit(&(zfsvfs)->z_teardown_lock, FTAG); \ 101 } while (0) 102 103 /* Verifies the znode is valid. */ 104 #define ZFS_VERIFY_ZP_ERROR(zp, error) \ 105 do { \ 106 if (unlikely((zp)->z_sa_hdl == NULL)) { \ 107 ZFS_EXIT(ZTOZSB(zp)); \ 108 return (error); \ 109 } \ 110 } while (0) 111 #define ZFS_VERIFY_ZP(zp) ZFS_VERIFY_ZP_ERROR(zp, EIO) 112 #define ZPL_VERIFY_ZP(zp) ZFS_VERIFY_ZP_ERROR(zp, -EIO) 113 114 /* 115 * Macros for dealing with dmu_buf_hold 116 */ 117 #define ZFS_OBJ_MTX_SZ 64 118 #define ZFS_OBJ_MTX_MAX (1024 * 1024) 119 #define ZFS_OBJ_HASH(zfsvfs, obj) ((obj) & ((zfsvfs->z_hold_size) - 1)) 120 121 extern unsigned int zfs_object_mutex_size; 122 123 /* 124 * Encode ZFS stored time values from a struct timespec / struct timespec64. 125 */ 126 #define ZFS_TIME_ENCODE(tp, stmp) \ 127 do { \ 128 (stmp)[0] = (uint64_t)(tp)->tv_sec; \ 129 (stmp)[1] = (uint64_t)(tp)->tv_nsec; \ 130 } while (0) 131 132 #if defined(HAVE_INODE_TIMESPEC64_TIMES) 133 /* 134 * Decode ZFS stored time values to a struct timespec64 135 * 4.18 and newer kernels. 136 */ 137 #define ZFS_TIME_DECODE(tp, stmp) \ 138 do { \ 139 (tp)->tv_sec = (time64_t)(stmp)[0]; \ 140 (tp)->tv_nsec = (long)(stmp)[1]; \ 141 } while (0) 142 #else 143 /* 144 * Decode ZFS stored time values to a struct timespec 145 * 4.17 and older kernels. 146 */ 147 #define ZFS_TIME_DECODE(tp, stmp) \ 148 do { \ 149 (tp)->tv_sec = (time_t)(stmp)[0]; \ 150 (tp)->tv_nsec = (long)(stmp)[1]; \ 151 } while (0) 152 #endif /* HAVE_INODE_TIMESPEC64_TIMES */ 153 154 #define ZFS_ACCESSTIME_STAMP(zfsvfs, zp) 155 156 struct znode; 157 158 extern int zfs_sync(struct super_block *, int, cred_t *); 159 extern int zfs_inode_alloc(struct super_block *, struct inode **ip); 160 extern void zfs_inode_destroy(struct inode *); 161 extern void zfs_inode_update(struct znode *); 162 extern void zfs_mark_inode_dirty(struct inode *); 163 extern boolean_t zfs_relatime_need_update(const struct inode *); 164 165 #if defined(HAVE_UIO_RW) 166 extern caddr_t zfs_map_page(page_t *, enum seg_rw); 167 extern void zfs_unmap_page(page_t *, caddr_t); 168 #endif /* HAVE_UIO_RW */ 169 170 extern zil_replay_func_t *zfs_replay_vector[TX_MAX_TYPE]; 171 extern int zfsfstype; 172 173 #ifdef __cplusplus 174 } 175 #endif 176 177 #endif /* _SYS_ZFS_ZNODE_IMPL_H */ 178