mirror of
https://github.com/opnsense/src.git
synced 2026-06-23 15:40:20 -04:00
1daad98176
zhold() wraps igrab() on Linux, and igrab() may fail when the inode is in the process of being deleted. This means zhold() must only be called when a reference exists and therefore it cannot be deleted. This is the case for all existing consumers so add a VERIFY and a comment explaining this requirement. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Adam Moss <c@yotes.com> Closes #11704
182 lines
5.1 KiB
C
182 lines
5.1 KiB
C
/*
|
|
* 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, 2018 by Delphix. All rights reserved.
|
|
* Copyright 2016 Nexenta Systems, Inc. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _SYS_ZFS_ZNODE_IMPL_H
|
|
#define _SYS_ZFS_ZNODE_IMPL_H
|
|
|
|
#ifndef _KERNEL
|
|
#error "no user serviceable parts within"
|
|
#endif
|
|
|
|
#include <sys/isa_defs.h>
|
|
#include <sys/types32.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>
|
|
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define ZNODE_OS_FIELDS \
|
|
struct inode z_inode;
|
|
|
|
|
|
/*
|
|
* Convert between znode pointers and inode pointers
|
|
*/
|
|
#define ZTOI(znode) (&((znode)->z_inode))
|
|
#define ITOZ(inode) (container_of((inode), znode_t, z_inode))
|
|
#define ZTOZSB(znode) ((zfsvfs_t *)(ZTOI(znode)->i_sb->s_fs_info))
|
|
#define ITOZSB(inode) ((zfsvfs_t *)((inode)->i_sb->s_fs_info))
|
|
|
|
#define ZTOTYPE(zp) (ZTOI(zp)->i_mode)
|
|
#define ZTOGID(zp) (ZTOI(zp)->i_gid)
|
|
#define ZTOUID(zp) (ZTOI(zp)->i_uid)
|
|
#define ZTONLNK(zp) (ZTOI(zp)->i_nlink)
|
|
|
|
#define Z_ISBLK(type) S_ISBLK(type)
|
|
#define Z_ISCHR(type) S_ISCHR(type)
|
|
#define Z_ISLNK(type) S_ISLNK(type)
|
|
#define Z_ISDEV(type) (S_ISCHR(type) || S_ISBLK(type) || S_ISFIFO(type))
|
|
#define Z_ISDIR(type) S_ISDIR(type)
|
|
|
|
#define zn_has_cached_data(zp) ((zp)->z_is_mapped)
|
|
#define zn_rlimit_fsize(zp, uio) (0)
|
|
|
|
/*
|
|
* zhold() wraps igrab() on Linux, and igrab() may fail when the
|
|
* inode is in the process of being deleted. As zhold() must only be
|
|
* called when a ref already exists - so the inode cannot be
|
|
* mid-deletion - we VERIFY() this.
|
|
*/
|
|
#define zhold(zp) VERIFY3P(igrab(ZTOI((zp))), !=, NULL)
|
|
#define zrele(zp) iput(ZTOI((zp)))
|
|
|
|
/* Called on entry to each ZFS inode and vfs operation. */
|
|
#define ZFS_ENTER_ERROR(zfsvfs, error) \
|
|
do { \
|
|
ZFS_TEARDOWN_ENTER_READ(zfsvfs, FTAG); \
|
|
if (unlikely((zfsvfs)->z_unmounted)) { \
|
|
ZFS_TEARDOWN_EXIT_READ(zfsvfs, FTAG); \
|
|
return (error); \
|
|
} \
|
|
} while (0)
|
|
#define ZFS_ENTER(zfsvfs) ZFS_ENTER_ERROR(zfsvfs, EIO)
|
|
#define ZPL_ENTER(zfsvfs) ZFS_ENTER_ERROR(zfsvfs, -EIO)
|
|
|
|
/* Must be called before exiting the operation. */
|
|
#define ZFS_EXIT(zfsvfs) \
|
|
do { \
|
|
zfs_exit_fs(zfsvfs); \
|
|
ZFS_TEARDOWN_EXIT_READ(zfsvfs, FTAG); \
|
|
} while (0)
|
|
|
|
#define ZPL_EXIT(zfsvfs) \
|
|
do { \
|
|
rrm_exit(&(zfsvfs)->z_teardown_lock, FTAG); \
|
|
} while (0)
|
|
|
|
/* Verifies the znode is valid. */
|
|
#define ZFS_VERIFY_ZP_ERROR(zp, error) \
|
|
do { \
|
|
if (unlikely((zp)->z_sa_hdl == NULL)) { \
|
|
ZFS_EXIT(ZTOZSB(zp)); \
|
|
return (error); \
|
|
} \
|
|
} while (0)
|
|
#define ZFS_VERIFY_ZP(zp) ZFS_VERIFY_ZP_ERROR(zp, EIO)
|
|
#define ZPL_VERIFY_ZP(zp) ZFS_VERIFY_ZP_ERROR(zp, -EIO)
|
|
|
|
/*
|
|
* Macros for dealing with dmu_buf_hold
|
|
*/
|
|
#define ZFS_OBJ_MTX_SZ 64
|
|
#define ZFS_OBJ_MTX_MAX (1024 * 1024)
|
|
#define ZFS_OBJ_HASH(zfsvfs, obj) ((obj) & ((zfsvfs->z_hold_size) - 1))
|
|
|
|
extern unsigned int zfs_object_mutex_size;
|
|
|
|
/*
|
|
* Encode ZFS stored time values from a struct timespec / struct timespec64.
|
|
*/
|
|
#define ZFS_TIME_ENCODE(tp, stmp) \
|
|
do { \
|
|
(stmp)[0] = (uint64_t)(tp)->tv_sec; \
|
|
(stmp)[1] = (uint64_t)(tp)->tv_nsec; \
|
|
} while (0)
|
|
|
|
#if defined(HAVE_INODE_TIMESPEC64_TIMES)
|
|
/*
|
|
* Decode ZFS stored time values to a struct timespec64
|
|
* 4.18 and newer kernels.
|
|
*/
|
|
#define ZFS_TIME_DECODE(tp, stmp) \
|
|
do { \
|
|
(tp)->tv_sec = (time64_t)(stmp)[0]; \
|
|
(tp)->tv_nsec = (long)(stmp)[1]; \
|
|
} while (0)
|
|
#else
|
|
/*
|
|
* Decode ZFS stored time values to a struct timespec
|
|
* 4.17 and older kernels.
|
|
*/
|
|
#define ZFS_TIME_DECODE(tp, stmp) \
|
|
do { \
|
|
(tp)->tv_sec = (time_t)(stmp)[0]; \
|
|
(tp)->tv_nsec = (long)(stmp)[1]; \
|
|
} while (0)
|
|
#endif /* HAVE_INODE_TIMESPEC64_TIMES */
|
|
|
|
#define ZFS_ACCESSTIME_STAMP(zfsvfs, zp)
|
|
|
|
struct znode;
|
|
|
|
extern int zfs_sync(struct super_block *, int, cred_t *);
|
|
extern int zfs_inode_alloc(struct super_block *, struct inode **ip);
|
|
extern void zfs_inode_destroy(struct inode *);
|
|
extern void zfs_mark_inode_dirty(struct inode *);
|
|
extern boolean_t zfs_relatime_need_update(const struct inode *);
|
|
|
|
#if defined(HAVE_UIO_RW)
|
|
extern caddr_t zfs_map_page(page_t *, enum seg_rw);
|
|
extern void zfs_unmap_page(page_t *, caddr_t);
|
|
#endif /* HAVE_UIO_RW */
|
|
|
|
extern zil_replay_func_t *zfs_replay_vector[TX_MAX_TYPE];
|
|
extern int zfsfstype;
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SYS_ZFS_ZNODE_IMPL_H */
|